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Showing 401 - 500 of 515 results

Accurate Collection and Reporting of Worker Presence in Work Zones

Qing, Zhu

;

Adu-Gyamfi, Yaw

2026-03-01 | PDF

Highway work zones remain high-risk environments due to the close interaction between workers, live traffic, and heavy equipment. While platforms like the Work Zone Data Exchange (WZDx) and DOT traveler information maps provide location and traffic impact data, real-time, verified information regarding actual worker presence is often unavailable. T ...

03/16/2026

Title : Accurate Collection and Reporting of Worker Presence in Work Zones Creator(s) : Qing, Zhu;Adu-Gyamfi, Yaw;Edara, Praveen;Sun, Carlos;Brown, Henry;Baek, Ho Jun;Amo-Boateng, Mark; Corporate Creator(s) : University of Missouri--Columbia. Department of Civil and Environmental Engineering Corporate Contributor(s) : Missouri. Department of Transportation. Construction and Materials Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-03-01 Report Number : cmr 26-006 URL : https://rosap.ntl.bts.gov/view/dot/89391 Qing, Zhu et al. (2026). Accurate Collection and Reporting of Worker Presence in Work Zones. Qing, Zhu et al. "Accurate Collection and Reporting of Worker Presence in Work Zones" (2026) Qing, Zhu et al. "Accurate Collection and Reporting of Worker Presence in Work Zones" , 2026 Export RIS Citation Information. TY - Tech Report AU - Qing, Zhu AU - Adu-Gyamfi, Yaw AU - Edara, Praveen AU - Sun, Carlos AU - Brown, Henry AU - Baek, Ho Jun AU - Amo-Boateng, Mark A2 - University of Missouri--Columbia. Department of Civil and Environmental Engineering A3 - Missouri. Department of Transportation. Construction and Materials Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Highway work zones remain high-risk environments due to the close interaction between workers, live traffic, and heavy equipment. While platforms like the Work Zone Data Exchange (WZDx) and DOT traveler information maps provide location and traffic impact data, real-time, verified information regarding actual worker presence is often unavailable. This data gap limits the effectiveness of smart work zone deployments and emerging connected vehicle applications. This study evaluated device-based location technologies for highway work zone applications by comparing Global Navigation Satellite System (GNSS) and Bluetooth Low Energy (BLE) approaches. Results indicated that BLE devices relying on crowdsourced networks produced inconsistent reporting and large location errors, particularly in rural areas, while GNSS devices provided more stable and temporally consistent data but involved tradeoffs related to cost, battery life, and data accessibility. To address these limitations, the research developed the WZ-Gateway Node, an open-source prototype that utilizes shared communication to reduce recurring costs. Complementing the hardware, the MU Worker Presence Platform was developed to process device-level data into validated worker presence attributes. By applying spatial buffering and activity classification logic, the platform filters false positive s and protects worker privacy while accurately associating field activity with work zone characteristics. Field evaluations confirmed the platform’s ability to generate WZDx-compliant feeds with real-time, verified worker presence information. These findings offer a practical roadmap for Missouri DOT and other transportation agencies to enhance traveler safety, smart work zone operations, and connected vehicle applications by basing worker presence alerts on actual field conditions. AN - dot:89391 ET - Final Report (October 2024-March 2026) KW - Construction KW - Construction and maintenance KW - Construction and maintenance personnel KW - Data collection KW - Location KW - Occupational safety KW - Road construction KW - Work zone safety LA - English PB - Missouri. Department of Transportation. Construction and Materials Division PY - 2026-03-01 SN - cmr 26-006 TI - Accurate Collection and Reporting of Worker Presence in Work Zones M3 - Tech Report N1 - United States N1 - TR202515 UR - https://rosap.ntl.bts.gov/view/dot/89391 ER -
Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 [Summary]

Suksawang, Nakin ;

Nolan, Steven

2026-03-01 | PDF

The research aimed to evaluate how screw anchors actually perform in real FDOT conditions, understand why the current ACI design approach is conservative, and develop improved FDOT design guidelines that safely allow screw anchors to be used more widely, without unnecessary restrictions.

03/16/2026

Title : Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 [Summary] Creator(s) : Suksawang, Nakin;Nolan, Steven; Corporate Creator(s) : Florida Institute of Technology Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2026-03-01 Report Number : BED28-977-02 URL : https://rosap.ntl.bts.gov/view/dot/89390 Suksawang, Nakin and Nolan, Steven (2026). Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 [Summary]. Suksawang, Nakin and Nolan, Steven "Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 [Summary]" (2026) Suksawang, Nakin and Nolan, Steven "Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 [Summary]" , 2026 Export RIS Citation Information. TY - Brief AU - Suksawang, Nakin AU - Nolan, Steven A2 - Florida Institute of Technology A3 - Florida. Department of Transportation AB - The research aimed to evaluate how screw anchors actually perform in real FDOT conditions, understand why the current ACI design approach is conservative, and develop improved FDOT design guidelines that safely allow screw anchors to be used more widely, without unnecessary restrictions. AN - dot:89390 ET - Summary KW - Bridge railings KW - Ground anchors KW - Bridge design KW - Failure KW - Crash investigation KW - Resistance tests KW - Strength of materials KW - Test procedures KW - Baseplates KW - Confinement Modification Factor KW - Reaction Area KW - Screw Anchors LA - English PB - Florida. Department of Transportation PY - 2026-03-01 SN - BED28-977-02 TI - Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 [Summary] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89390 ER -
Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3

Suksawang, Nakin ;

Nolan, Steven

2024-01-01 | PDF

The AASHTO Committee on Bridges and Structures has approved the updated ACI CODE-318, 2019 edition (ACI CODE 318-19,) into the 10th edition of the AASHTO LRFD Bridge Design Specifications. This would allow the adoption of screw anchor designs that benefit from rapid, reliable, and simplified installation procedures. However, the ACI CODE approach h ...

03/16/2026

Title : Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 Creator(s) : Suksawang, Nakin;Nolan, Steven; Corporate Creator(s) : Florida Institute of Technology Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2024-01-01 URL : https://rosap.ntl.bts.gov/view/dot/89389 Suksawang, Nakin and Nolan, Steven (2024). Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3. Suksawang, Nakin and Nolan, Steven "Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3" (2024) Suksawang, Nakin and Nolan, Steven "Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3" , 2024 Export RIS Citation Information. TY - Tech Report AU - Suksawang, Nakin AU - Nolan, Steven A2 - Florida Institute of Technology A3 - Florida. Department of Transportation AB - The AASHTO Committee on Bridges and Structures has approved the updated ACI CODE-318, 2019 edition (ACI CODE 318-19,) into the 10th edition of the AASHTO LRFD Bridge Design Specifications. This would allow the adoption of screw anchor designs that benefit from rapid, reliable, and simplified installation procedures. However, the ACI CODE approach has been shown to be too conservative in typical FDOT applications because it does not account for the confinement effect caused by the metal baseplate's compressive force in the concrete breakout cone. Furthermore, previous studies have shown that the predominant failure mode of screw anchor is a combined failure with a much higher breakout capacity than the concrete breakout failure limited by the ACI CODE. Therefore, this research provides an experimental investigation of the failure mechanism and appropriate confinement effect of screw anchors used in typical FDOT applications. Results indicated that the screw anchors’ breakout resistance consistently exceeded nominal strength predicted by ACI CODE and the required design loads. It is recommended that FDOT permit the use of screw anchors because it reduces installation cost and time because there is no additional adhesive cost or need to wait for adhesive to cure. It is also recommended that FDOT adopts a strength reduction factor of ϕ = 0.75 for both design purposes and when evaluating future test results for screw anchors instead of the ACI CODE ϕ = 0.65. AN - dot:89389 ET - Draft Final: May 2021 – Dec 2023 KW - Bridge railings KW - Ground anchors KW - Bridge design KW - Failure KW - Crash investigation KW - Resistance tests KW - Strength of materials KW - Test procedures KW - Baseplates KW - Confinement Modification Factor KW - Reaction Area KW - Screw Anchors LA - English PB - Florida. Department of Transportation PY - 2024-01-01 TI - Confinement Effect of Narrow Baseplates or Reaction Area on Anchor Breakout, Part 3 M3 - Tech Report N1 - United States N1 - BDV28-977-09 & BED28-977-02 UR - https://rosap.ntl.bts.gov/view/dot/89389 ER -
Implementation of Roadside Erosion Control Research Results

Huffine, Wayne W. ;

Cargill, L. M.

1981-06-30 | PDF

Large scale areas were established to demonstrate implementation of research findings. These included: (1) johnsongrass control, (2) willow control, (3) bindweed control, (4) broadleaf weed control, (5) sandbur control, (6) seeding Plains bluestem, and (7) planting ground covers other than grass. As a result, the use of herbicides for roadside main ...

03/16/2026

Title : Implementation of Roadside Erosion Control Research Results Creator(s) : Huffine, Wayne W.;Cargill, L. M.; Corporate Creator(s) : Oklahoma State University. Department of Agronomy Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1981-06-30 Report Number : FHWA-OK-81-6 URL : https://rosap.ntl.bts.gov/view/dot/89388 Huffine, Wayne W. and Cargill, L. M. (1981). Implementation of Roadside Erosion Control Research Results. Huffine, Wayne W. and Cargill, L. M. "Implementation of Roadside Erosion Control Research Results" (1981) Huffine, Wayne W. and Cargill, L. M. "Implementation of Roadside Erosion Control Research Results" , 1981 Export RIS Citation Information. TY - Tech Report AU - Huffine, Wayne W. AU - Cargill, L. M. A2 - Oklahoma State University. Department of Agronomy A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Large scale areas were established to demonstrate implementation of research findings. These included: (1) johnsongrass control, (2) willow control, (3) bindweed control, (4) broadleaf weed control, (5) sandbur control, (6) seeding Plains bluestem, and (7) planting ground covers other than grass. As a result, the use of herbicides for roadside maintenance has increased dramatically in the period 1967 to 1981. In 1976, approximately 300 acres were treated with herbicides. By 1980, the total exceeded 109,000 acres. Meanwhile mowing has been reduced substantially, from 229,729 acres in 1976 to 157,912 acres in 1980. Cost savings have been especially significant. Mowing costs have continued to rise each year to $11.56 per acre in 1980, while chemical costs have decreased in the past three years to $7.65 per acre in 1980, a savings of almost $4.00 per acre. The selective control of johnsongrass along Oklahoma highways can be achieved with applications of MSMA (monosodium methanearsonate), or DSMA (disodium methanearsonate). Willows less than 4 to 5 inches in diameter, can effectively be controlled during the dormant season (February-March) by a basal bark treatment of 2,4-D low volatile ester in diesel oil (ratio 1:25). Two annual applications, for 2 to 3 years, made with 1 quart of 2, 4-D low volatile ester (4 lb. ai/gal) in water at 40 gpa, can eliminate 75% or more of the perennial bindweed from our roadsides. The preemergence application of Aatrex 4L, or Abatrex 0W, has provided 95 to 100% broadleaf control, and most annual grasses. Sandburs can be effectively eradicated with 2 to 3 annual applications of DSMA. The lack of precipitation during the year of establishment, resulted in very little success with Plains bluestem and Japanese honeysuckle, in producing erosion resistant ground cover. AN - dot:89388 ET - Final Report 1-2-76 to 6-30-81 KW - Roadside flora and fauna KW - Erosion control KW - Roadside improvement KW - Measures of effectiveness KW - Vegetation control KW - Weed control LA - English PB - Oklahoma. Department of Transportation PY - 1981-06-30 SN - FHWA-OK-81-6 TI - Implementation of Roadside Erosion Control Research Results M3 - Tech Report N1 - United States N1 - 76-04-03 UR - https://rosap.ntl.bts.gov/view/dot/89388 ER -
Discarded Tires in Highway Construction

Brewer, Wilson B.

1982-11-01 | PDF

This report discusses a single bituminous surface treatment using an asphalt-rubber binder and pre-coated aggregate over a bleeding and cracked asphalt concrete highway. Tests and evaluations include: a pavement condition rating, core sample descriptions, subgrade soils, pavement deflection measurements and pavement serviceability. An asphalt-rubbe ...

03/16/2026

Title : Discarded Tires in Highway Construction Creator(s) : Brewer, Wilson B. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1982-11-01 Report Number : FHWA/OK 82(4) URL : https://rosap.ntl.bts.gov/view/dot/89387 Brewer, Wilson B. (1982). Discarded Tires in Highway Construction. Brewer, Wilson B. "Discarded Tires in Highway Construction" (1982) Brewer, Wilson B. "Discarded Tires in Highway Construction" , 1982 Export RIS Citation Information. TY - Tech Report AU - Brewer, Wilson B. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This report discusses a single bituminous surface treatment using an asphalt-rubber binder and pre-coated aggregate over a bleeding and cracked asphalt concrete highway. Tests and evaluations include: a pavement condition rating, core sample descriptions, subgrade soils, pavement deflection measurements and pavement serviceability. An asphalt-rubber single bituminous surface treatment is more than twice the cost of a standard surface treatment. The asphalt-rubber treatment will have a three year evaluation. The roadway condition and the cost effectiveness will be evaluated at the end of that time period. AN - dot:89387 ET - Interim Report KW - Additives KW - Maintenance KW - Pavements KW - Recycling KW - Tires LA - English PB - Oklahoma. Department of Transportation PY - 1982-11-01 SN - FHWA/OK 82(4) TI - Discarded Tires in Highway Construction M3 - Tech Report N1 - United States N1 - DTFH71-81-37-0K-02 UR - https://rosap.ntl.bts.gov/view/dot/89387 ER -
Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary]

DeLorenzo, Richard ;

Riding, Kyle A.

2026-03-01 | PDF

The main objective of this research was to identify and quantify the factors that influence resistivity measurements in concrete samples, comparing field- and laboratory-fabricated specimens (per AASHTO T 358 and AASHTO TP 119).

03/16/2026

Title : Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary] Creator(s) : DeLorenzo, Richard;Riding, Kyle A.; Corporate Creator(s) : University of Florida (Gainesville). Engineering School of Sustainable Infrastructure and Environment Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2026-03-01 Report Number : BED05 URL : https://rosap.ntl.bts.gov/view/dot/89386 DeLorenzo, Richard and Riding, Kyle A. (2026). Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary]. DeLorenzo, Richard and Riding, Kyle A. "Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary]" (2026) DeLorenzo, Richard and Riding, Kyle A. "Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary]" , 2026 Export RIS Citation Information. TY - Brief AU - DeLorenzo, Richard AU - Riding, Kyle A. A2 - University of Florida (Gainesville). Engineering School of Sustainable Infrastructure and Environment A3 - Florida. Department of Transportation AB - The main objective of this research was to identify and quantify the factors that influence resistivity measurements in concrete samples, comparing field- and laboratory-fabricated specimens (per AASHTO T 358 and AASHTO TP 119). AN - dot:89386 ET - Summary KW - Concrete KW - Durability KW - Resistivity method KW - Variables KW - Laboratory tests KW - Moisture content KW - Temperature control (Structures) LA - English PB - Florida. Department of Transportation PY - 2026-03-01 SN - BED05 TI - Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89386 ER -
Flight Loads and Airframe Usage Analysis of Next-Generation Airtankers – BAe-146 and RJ-85

Rokhsaz, Kamran ;

Kliment, Linda K.

2026-01-01 | PDF

This report addresses in-flight recorded data from eight BAe-146s and eight RJ-85s flown in support of the United State Forest Service aerial firefighting operations. All flight data was recorded at 32 Hz by IONode100 units supported by Latitude Technologies, Corp. All data was examined for integrity, and anomalies and inaccuracies were identified ...

03/16/2026

Title : Flight Loads and Airframe Usage Analysis of Next-Generation Airtankers – BAe-146 and RJ-85 Creator(s) : Rokhsaz, Kamran;Kliment, Linda K.;Rollins, Elizabeth; Corporate Creator(s) : Wichita State University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. NextGen Human Factors Division (ANG-C1) Published Date : 2026-01-01 Report Number : DOT/FAA/TC-20/13 DOI : https://doi.org/10.21949/1f49-b349 Rokhsaz, Kamran et al. (2026). Flight Loads and Airframe Usage Analysis of Next-Generation Airtankers – BAe-146 and RJ-85. https://doi.org/10.21949/1f49-b349 Rokhsaz, Kamran and Kliment, Linda K. and Rollins, Elizabeth "Flight Loads and Airframe Usage Analysis of Next-Generation Airtankers – BAe-146 and RJ-85" (2026), https://doi.org/10.21949/1f49-b349 Rokhsaz, Kamran et al. "Flight Loads and Airframe Usage Analysis of Next-Generation Airtankers – BAe-146 and RJ-85" , 2026, https://doi.org/10.21949/1f49-b349 Export RIS Citation Information. TY - Tech Report AU - Rokhsaz, Kamran AU - Kliment, Linda K. AU - Rollins, Elizabeth A2 - Wichita State University A3 - United States. Department of Transportation. Federal Aviation Administration. NextGen Human Factors Division (ANG-C1) A4 - Mottaghi, Sohrob AB - This report addresses in-flight recorded data from eight BAe-146s and eight RJ-85s flown in support of the United State Forest Service aerial firefighting operations. All flight data was recorded at 32 Hz by IONode100 units supported by Latitude Technologies, Corp. All data was examined for integrity, and anomalies and inaccuracies were identified and outlined. Similarities between BAe-146 and RJ-85 were used to rationalize combining their results. Flights were divided into firefighting, ferry, and maintenance/training missions. Firefighting flights were divided into five separate phases. Statistical results of the airframe usage were presented and compared with aircraft limitations. This information includes altitude, airspeed, duration and distance, number of retardant drops per flight, maximum and minimum vertical load factors, flap cycling frequency, and takeoff and landing weights. Unreliable pitch-and-roll angle and cabin pressure recordings prevented examination of these parameters. In several cases, the vertical accelerations were shown to exceed the limit load factors with flaps extended. Detailed examination of the data revealed that these occurred mostly during the drop phase. Also, in a number of cases, the maximum indicated airspeed was shown to be slightly above the prescribed limits. The recorded normal accelerations were shown to contain frequencies due to structural vibration. Results of the effect of different filters on flight loads spectra are presented in an appendix. Based on these results, a low-pass, eighth-order Butterworth filter with an 8-Hz cutoff frequency was used to attenuate the structural frequencies. After filtering, vertical load factors were divided into gust and maneuver loads using the two-second rule. Using the method of peaks-between-means, exceedance spectra for gust and maneuver loads were developed for ground-air-ground cycles, as well as for specific flight phases. These results were compared to those of the legacy airtankers and other aircraft flown in support of firefighting missions and as civil transport. The gust load factor spectra are shown to be similar to other United States Forest Service aircraft being flown in the same environment. The maneuver load factor spectra are shown to indicate smaller loads than those of legacy airtankers, but considerably exceeding in frequency those of civil transport. Derived gust velocities were extracted for BAe-146 aircraft and their cumulative occurrences were presented. Erroneous recording of the aircraft weight prevented inclusion of data from RJ-85 airframes. The report concludes with some recommendations for improved data acquisition for future efforts. AN - dot:89385 DO - https://doi.org/10.21949/1f49-b349 ET - Phase I Final Report KW - Flight plans KW - Statistical analysis KW - Wing loading KW - Flight dynamics KW - Data KW - Flight profiles KW - Flight loads spectrum KW - Statistical loads data LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026-01-01 SN - DOT/FAA/TC-20/13 TI - Flight Loads and Airframe Usage Analysis of Next-Generation Airtankers – BAe-146 and RJ-85 M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89385 ER -
Hot Recycling of Asphalt Pavements

Pourkhosrow, Ghasem

1982-10-01 | PDF

The objective of this report is to evaluate the feasibility and benefit of utilizing asphalt pavement hot recycling in Oklahoma. The work began in April,1980 and lasted through June 1980. The 8 1/2 mile (13.6 km) project was located on I-40 in Caddo County. _The project involved cold milling the top one inch (25 mm) of roadway. A non-woven polyprop ...

03/16/2026

Title : Hot Recycling of Asphalt Pavements Creator(s) : Pourkhosrow, Ghasem Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1982-10-01 Report Number : FHWA/OK 82(4) URL : https://rosap.ntl.bts.gov/view/dot/89384 Pourkhosrow, Ghasem (1982). Hot Recycling of Asphalt Pavements. Pourkhosrow, Ghasem "Hot Recycling of Asphalt Pavements" (1982) Pourkhosrow, Ghasem "Hot Recycling of Asphalt Pavements" , 1982 Export RIS Citation Information. TY - Tech Report AU - Pourkhosrow, Ghasem A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of this report is to evaluate the feasibility and benefit of utilizing asphalt pavement hot recycling in Oklahoma. The work began in April,1980 and lasted through June 1980. The 8 1/2 mile (13.6 km) project was located on I-40 in Caddo County. _The project involved cold milling the top one inch (25 mm) of roadway. A non-woven polypropylene fabric, Petromat, was placed on the cold milled surface. This material was overlaid with 1 1/2 inches (38 mm) of the hot recycled mixture containing recycled asphalt concrete, virgin aggregate, and asphalt cement. AN - dot:89384 ET - Final Report KW - Asphalt pavements KW - Binder course KW - Bituminous bases KW - Cold mix paving mixtures KW - Hot mix asphalt KW - Pavement base course KW - Recycled materials KW - Specifications KW - Stabilized materials LA - English PB - Oklahoma. Department of Transportation PY - 1982-10-01 SN - FHWA/OK 82(4) TI - Hot Recycling of Asphalt Pavements M3 - Tech Report N1 - United States N1 - DOT-FH-15-391 UR - https://rosap.ntl.bts.gov/view/dot/89384 ER -
Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples

Grisales, Alvaro Mendoza ;

Ferraro, Christopher C.

2024-02-01 | PDF

Before specifications can be developed for use of electrical resistivity in quality control programs, potential differences between field- and laboratory-made samples must be quantified. The present research was conducted to provide a better understanding of the effect of each of the factors studied in the variability observed between field-fabrica ...

03/16/2026

Title : Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples Creator(s) : Grisales, Alvaro Mendoza;Ferraro, Christopher C.;Riding, Kyle A.; Corporate Creator(s) : University of Florida (Gainesville). Engineering School of Sustainable Infrastructure and Environment Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2024-02-01 Report Number : BED05 URL : https://rosap.ntl.bts.gov/view/dot/89383 Grisales, Alvaro Mendoza et al. (2024). Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples. Grisales, Alvaro Mendoza and Ferraro, Christopher C. and Riding, Kyle A. "Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples" (2024) Grisales, Alvaro Mendoza et al. "Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples" , 2024 Export RIS Citation Information. TY - Tech Report AU - Grisales, Alvaro Mendoza AU - Ferraro, Christopher C. AU - Riding, Kyle A. A2 - University of Florida (Gainesville). Engineering School of Sustainable Infrastructure and Environment A3 - Florida. Department of Transportation AB - Before specifications can be developed for use of electrical resistivity in quality control programs, potential differences between field- and laboratory-made samples must be quantified. The present research was conducted to provide a better understanding of the effect of each of the factors studied in the variability observed between field-fabricated and laboratory-fabricated samples, to establish expected variations and formulate recommendations to reduce these offsets to expand resistivity testing to field-fabricated samples. The resistivity results showed that frequency used was significant for the least number of mixtures and should have only a minor effect. Temperature control was found to be significant for only a few mixtures (7% to 20%) and RCONTM (13% to 27%). Time of demolding was found to be significant for more mixtures with surface resistivity than bulk resistivity. Limewater curing in a communal tank vs. in individual buckets was found significant in 40% of the mixtures in both surface and bulk resistivity at 28 days. Moisture state during testing was found to be a significant variable. Significant differences in resistivity measurements were found between equipment used. AN - dot:89383 ET - Final Report: 03/2022 – 02/2024 KW - Concrete KW - Durability KW - Resistivity method KW - Variables KW - Laboratory tests KW - Moisture content KW - Temperature control (Structures) LA - English PB - Florida. Department of Transportation PY - 2024-02-01 SN - BED05 TI - Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89383 ER -
Open-Graded Friction Courses Suitable for Suburban Environments [Summary]

Tran, Nam ;

Moseley, Howie

2026-03-01 | PDF

The project aimed to evaluate the impact of four strategies designed to improve the durability of FC-5 mixtures: employing a 9.5-mm nominal maximum aggregate size (NMAS) gradation; using a high polymer (HP) modified binder in the mixture; assessing the effectiveness of a 12.5-mm stone matrix asphalt (SMA); and exploring an alternative friction cour ...

03/16/2026

Title : Open-Graded Friction Courses Suitable for Suburban Environments [Summary] Creator(s) : Tran, Nam;Moseley, Howie; Corporate Creator(s) : Auburn University. National Center for Asphalt Technology Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2026-03-01 Report Number : BEB15 URL : https://rosap.ntl.bts.gov/view/dot/89382 Tran, Nam and Moseley, Howie (2026). Open-Graded Friction Courses Suitable for Suburban Environments [Summary]. Tran, Nam and Moseley, Howie "Open-Graded Friction Courses Suitable for Suburban Environments [Summary]" (2026) Tran, Nam and Moseley, Howie "Open-Graded Friction Courses Suitable for Suburban Environments [Summary]" , 2026 Export RIS Citation Information. TY - Brief AU - Tran, Nam AU - Moseley, Howie A2 - Auburn University. National Center for Asphalt Technology A3 - Florida. Department of Transportation AB - The project aimed to evaluate the impact of four strategies designed to improve the durability of FC-5 mixtures: employing a 9.5-mm nominal maximum aggregate size (NMAS) gradation; using a high polymer (HP) modified binder in the mixture; assessing the effectiveness of a 12.5-mm stone matrix asphalt (SMA); and exploring an alternative friction course (AFC).The study sought to ensure that these mixtures could provide adequate drainage, surface friction, and improved durability for use in suburban areas. AN - dot:89382 ET - Summary Report KW - Open graded aggregates KW - Mix design KW - Polymers KW - Durability KW - Permeability KW - Literature reviews KW - Socioeconomic areas KW - Rutting KW - Laboratory tests LA - English PB - Auburn University. National Center for Asphalt Technology PY - 2026-03-01 SN - BEB15 TI - Open-Graded Friction Courses Suitable for Suburban Environments [Summary] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89382 ER -
Open-Graded Friction Courses Suitable for Suburban Environments

Tran, Nam ;

Chen, Chen

2024-03-01 | PDF

The Florida Department of Transportation (FDOT) uses a 12.5-mm nominal maximum aggregate size (NMAS) open-graded friction course (OGFC) called FC-5 on multi-lane roads to enhance safety. However, FC-5 is susceptible to premature raveling on high-speed suburban roads due to increased lateral turning, braking and accelerating stresses. To address thi ...

03/16/2026

Title : Open-Graded Friction Courses Suitable for Suburban Environments Creator(s) : Tran, Nam;Chen, Chen;Tran, Trung;Taylor, Adam;Yin, Fan;Watson, Donald;Musselman, Jim; Corporate Creator(s) : Auburn University. National Center for Asphalt Technology Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2024-03-01 URL : https://rosap.ntl.bts.gov/view/dot/89381 Tran, Nam et al. (2024). Open-Graded Friction Courses Suitable for Suburban Environments. Tran, Nam et al. "Open-Graded Friction Courses Suitable for Suburban Environments" (2024) Tran, Nam et al. "Open-Graded Friction Courses Suitable for Suburban Environments" , 2024 Export RIS Citation Information. TY - Tech Report AU - Tran, Nam AU - Chen, Chen AU - Tran, Trung AU - Taylor, Adam AU - Yin, Fan AU - Watson, Donald AU - Musselman, Jim A2 - Auburn University. National Center for Asphalt Technology A3 - Florida. Department of Transportation AB - The Florida Department of Transportation (FDOT) uses a 12.5-mm nominal maximum aggregate size (NMAS) open-graded friction course (OGFC) called FC-5 on multi-lane roads to enhance safety. However, FC-5 is susceptible to premature raveling on high-speed suburban roads due to increased lateral turning, braking and accelerating stresses. To address this issue, the project explored using a finer 9.5-mm NMAS OGFC gradation, a high polymer (HP) modified binder, an alternative friction course (AFC), and a 12.5-mm NMAS stone matrix asphalt (SMA) to improve durability with minimal impact on permeability for its potential use in suburban environments. A literature review was first conducted to review the application of OGFC in the United States and design factors that influence OGFC performance. Subsequently, the study compared 9.5-mm NMAS OGFC, 12.5-mm AFC, and 12.5-mm SMA mixtures with current FC-5 mixtures using two asphalt binder types through comprehensive laboratory testing. Results indicated that the 9.5-mm gradation and HP binder independently impacted OGFC performance in a positive manner and enhanced durability and friction without compromising permeability or rutting resistance. The AFC mixtures demonstrated better durability than FC-5 and 9.5-mm OGFC mixtures while maintaining reasonable drainability and permeability. Therefore, it is recommended that FDOT consider using a 9.5-mm OGFC mixture, AFC mixture, and/or HP binder in suburban areas to improve pavement durability while maintaining safety characteristics. The increased cost of utilizing 9.5-mm OGFC and AFC mixtures is approximately $2 per ton. The study provides mix design procedures and performance requirements for these mixtures. These recommendations aim to facilitate the implementation of 9.5-mm OGFC and AFC mixtures, maintaining construction practices consistent with FC-5 mixtures. AN - dot:89381 ET - Final Report: May 2021 – April 2024 KW - Open graded aggregates KW - Mix design KW - Polymers KW - Durability KW - Permeability KW - Literature reviews KW - Socioeconomic areas KW - Rutting KW - Laboratory tests KW - OGFC Mix Design KW - FC-5 KW - High Polymer Modified Binder KW - OGFC Mixture Performance LA - English PB - Auburn University. National Center for Asphalt Technology PY - 2024-03-01 TI - Open-Graded Friction Courses Suitable for Suburban Environments M3 - Tech Report N1 - United States N1 - BEB15 UR - https://rosap.ntl.bts.gov/view/dot/89381 ER -
Related Studies to Cathodic Protection of Reinforced Structures

Locke, Carl E. ;

Dehghanian, Changiz

1983-01-01 | PDF

Cathodic protection of steel in portland cement concrete requires information concerning several different areas. This report describes studies which were pointed toward developing an understanding of several of these. A study of making an asphaltic concrete conductive was accomplished using coke breeze mixed with asphalt and aggregate. Mixes conta ...

03/16/2026

Title : Related Studies to Cathodic Protection of Reinforced Structures Creator(s) : Locke, Carl E.;Dehghanian, Changiz; Corporate Creator(s) : University of Oklahoma. School of Chemical Engineering and Materials Science Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1983-01-01 Report Number : FHWA/OK 82 (06) URL : https://rosap.ntl.bts.gov/view/dot/89380 Locke, Carl E. and Dehghanian, Changiz (1983). Related Studies to Cathodic Protection of Reinforced Structures. Locke, Carl E. and Dehghanian, Changiz "Related Studies to Cathodic Protection of Reinforced Structures" (1983) Locke, Carl E. and Dehghanian, Changiz "Related Studies to Cathodic Protection of Reinforced Structures" , 1983 Export RIS Citation Information. TY - Tech Report AU - Locke, Carl E. AU - Dehghanian, Changiz A2 - University of Oklahoma. School of Chemical Engineering and Materials Science A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Cathodic protection of steel in portland cement concrete requires information concerning several different areas. This report describes studies which were pointed toward developing an understanding of several of these. A study of making an asphaltic concrete conductive was accomplished using coke breeze mixed with asphalt and aggregate. Mixes containing 45% coke breeze, 7-11% asphalt and the remainder a standard aggregate were found to be appropriate for conductive layers for cathodic protection. It was found possible to determine corrosion rates electrochemically using linear polarization. This laboratory technique gave corrosion rates similar to values obtained in other laboratories using other techniques. Testing in the laboratory and bridge decks of molybdneum-molybdneum oxide electrodes indicated these would be useful as embeddable reference electrodes in concrete. Silver-silver chloride electrodes were not found to be stable in this application. These electrochemical half-cells, MoMo03, should prove to be useful for cathodic protection systems which require controlled potentials. Reinforced concrete cylinders were exposed to cathodic protection level currents for five years. Pullout strengths and concentrations of sodium, potassium and chloride ions were determined throughout this time period. These data indicate the cathodic protection currents reduce the bond strength of the steel and concrete after about 3.5 years, due to accumulation of sodium and potassium at the interface between steel and concrete. AN - dot:89380 ET - Final Report KW - Adhesive bond strength KW - Aggregates KW - Asphalt concrete KW - Bonding KW - Bridge decks KW - Cathodic protection KW - Coke KW - Corrosion KW - Molybdenum KW - Portland cement concrete LA - English PB - Oklahoma. Department of Transportation PY - 1983-01-01 SN - FHWA/OK 82 (06) TI - Related Studies to Cathodic Protection of Reinforced Structures M3 - Tech Report N1 - United States N1 - 77-03-2 UR - https://rosap.ntl.bts.gov/view/dot/89380 ER -
The Evaluation of Non-Woven Fabrics: Petromat and Mirafi

Pourkhosrow, Ghasem

1982-05-01 | PDF

The objective of this report is to study non-woven Thermoplastic fiber fabrics and their effects in eliminating and diminishing reflective cracking in asphalt concrete overlays. Two fabrics, namely Petromat and Mirafi 140, were placed on an existing Interstate highway. The road was overlayed with 1/2 inches of Type C asphalt concrete and 3/4 inches ...

03/16/2026

Title : The Evaluation of Non-Woven Fabrics: Petromat and Mirafi Creator(s) : Pourkhosrow, Ghasem Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1982-05-01 Report Number : FHWA/OK 82(6) URL : https://rosap.ntl.bts.gov/view/dot/89379 Pourkhosrow, Ghasem (1982). The Evaluation of Non-Woven Fabrics: Petromat and Mirafi. Pourkhosrow, Ghasem "The Evaluation of Non-Woven Fabrics: Petromat and Mirafi" (1982) Pourkhosrow, Ghasem "The Evaluation of Non-Woven Fabrics: Petromat and Mirafi" , 1982 Export RIS Citation Information. TY - Tech Report AU - Pourkhosrow, Ghasem A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of this report is to study non-woven Thermoplastic fiber fabrics and their effects in eliminating and diminishing reflective cracking in asphalt concrete overlays. Two fabrics, namely Petromat and Mirafi 140, were placed on an existing Interstate highway. The road was overlayed with 1/2 inches of Type C asphalt concrete and 3/4 inches open graded friction course. The fabrics appear to be performing in a cost effective manner. AN - dot:89379 ET - Final Report KW - Pavements KW - Reflection cracking KW - Fabrics KW - Nonwoven materials LA - English PB - Oklahoma. Department of Transportation PY - 1982-05-01 SN - FHWA/OK 82(6) TI - The Evaluation of Non-Woven Fabrics: Petromat and Mirafi M3 - Tech Report N1 - United States N1 - 78-15-1 Item 2278 UR - https://rosap.ntl.bts.gov/view/dot/89379 ER -
Shrink and Swell of Excavated Earth Materials

Hayes, Curtis J.

1983-01-01 | PDF

This study is an attempt to determine from laboratory tests the shrink or swell characteristics of excavated pedological soils. Twenty-six benchmark soils of various particle size classes were selected for study. It was found that sandy loam soils shrink the most. They shrink about 14 percent. Clay soils may not shrink at all. Standard Proctor dens ...

03/16/2026

Title : Shrink and Swell of Excavated Earth Materials Creator(s) : Hayes, Curtis J. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1983-01-01 Report Number : FHWA/OK 8 3(01) URL : https://rosap.ntl.bts.gov/view/dot/89378 Hayes, Curtis J. (1983). Shrink and Swell of Excavated Earth Materials. Hayes, Curtis J. "Shrink and Swell of Excavated Earth Materials" (1983) Hayes, Curtis J. "Shrink and Swell of Excavated Earth Materials" , 1983 Export RIS Citation Information. TY - Tech Report AU - Hayes, Curtis J. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This study is an attempt to determine from laboratory tests the shrink or swell characteristics of excavated pedological soils. Twenty-six benchmark soils of various particle size classes were selected for study. It was found that sandy loam soils shrink the most. They shrink about 14 percent. Clay soils may not shrink at all. Standard Proctor densities (AASHTO T99) were used as the compactive effort to induce the reduction in soil volume. The amount of shrinkage relates to the natural pore sizes and shapes as well as moisture content. Liquid limit values correlate fairly well with shrinkage factors. This report will be useful to design engineers when making estimates of soil shrinkage or verifying estimates derived from other information. Savings of up to $30,000 may be realized on a typical grade and drainage project, based on the information provided in this report. AN - dot:89378 ET - Final Report, January, 198 3 KW - Clay soils KW - Density KW - Laboratory tests KW - Liquid limits KW - Loam KW - Moisture content KW - Pore size distribution KW - Sandy soils KW - Soils KW - Shrinkage KW - Swelling soils LA - English PB - Oklahoma. Department of Transportation PY - 1983-01-01 SN - FHWA/OK 8 3(01) TI - Shrink and Swell of Excavated Earth Materials M3 - Tech Report N1 - United States N1 - 71-11-1, Item 23 UR - https://rosap.ntl.bts.gov/view/dot/89378 ER -
Enhanced Bridge Cost Estimating

Eamon, Christopher D. ;

Shinki, Kazuhiko

2023-11-01 | PDF

The primary objectives of this research were to: 1) develop an efficient and accurate method for bridge repair and replacement cost estimating; and 2) implement the developed method in a cost estimation worksheet; 3) provide an automated system that allows periodic updating of costs. To accomplish these objectives, several modeling approaches were ...

03/16/2026

Title : Enhanced Bridge Cost Estimating Creator(s) : Eamon, Christopher D.;Shinki, Kazuhiko;Darwish, Ihab;Garcia, Jose;Wong, Kin Hang;Alsendi, Ahmad;Hozeski, Erika; Corporate Creator(s) : Wayne State University. Department of Civil and Environmental Engineering Corporate Contributor(s) : Michigan. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2023-11-01 Report Number : SPR-1732 URL : https://rosap.ntl.bts.gov/view/dot/89377 Eamon, Christopher D. et al. (2023). Enhanced Bridge Cost Estimating. Eamon, Christopher D. et al. "Enhanced Bridge Cost Estimating" (2023) Eamon, Christopher D. et al. "Enhanced Bridge Cost Estimating" , 2023 Export RIS Citation Information. TY - Tech Report AU - Eamon, Christopher D. AU - Shinki, Kazuhiko AU - Darwish, Ihab AU - Garcia, Jose AU - Wong, Kin Hang AU - Alsendi, Ahmad AU - Hozeski, Erika A2 - Wayne State University. Department of Civil and Environmental Engineering A3 - Michigan. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The primary objectives of this research were to: 1) develop an efficient and accurate method for bridge repair and replacement cost estimating; and 2) implement the developed method in a cost estimation worksheet; 3) provide an automated system that allows periodic updating of costs. To accomplish these objectives, several modeling approaches were investigated, including simple linear regression, multiple linear regression, lasso regression, and two versions of case-based reasoning (CBR). Overall, it was found that all approaches could produce more accurate cost predictions for individual pay items than the existing MDOT engineering estimate, and that lasso regression was most effective. Next, cost estimation models were developed for the bridge work types currently used by MDOT. An approach was developed to identify work types within the cost database using primary pay items, and the total work type cost within a project was determined by summing all pay item costs associated with that work type. Several different work type cost approaches were developed: base, supplemental, substitute, and cost average approaches. Both average unit costs and regressed costs were provided. A time-series based MHCCI projection method was developed to consider future cost projections. A cost estimation spreadsheet and automated updating program were developed. AN - dot:89377 ET - Draft Final Report, 10/26/2022 to 11/1/2023 KW - Bridge construction KW - Cost estimating KW - Control system applications KW - Repairing KW - Regression analysis KW - Mathematical prediction KW - Time series KW - Databases LA - English PB - Michigan Department of Transportation. Research Administration PY - 2023-11-01 SN - SPR-1732 TI - Enhanced Bridge Cost Estimating M3 - Tech Report N1 - United States N1 - 2022-0435 Z1 UR - https://rosap.ntl.bts.gov/view/dot/89377 ER -
Using Connected Intelligent Transportation To Enhance Vulnerable Road User Safety

Huang, Zilin ;

Wan, Zhengyang

2025-12-01 | PDF

This project leverages connected intelligent transportation technologies to enhance the safety of vulnerable road users (VRUs) within evolving urban road systems. This project targets three fundamental barriers: the lack of high-fidelity experimental platforms, localization failures in GNSS-denied areas, and insufficient trajectory prediction for h ...

03/16/2026

Title : Using Connected Intelligent Transportation To Enhance Vulnerable Road User Safety Creator(s) : Huang, Zilin;Wan, Zhengyang;Sheng, Zihao;Ahn, Sue;Noyce, David A.;Chen, Sikai; Corporate Creator(s) : University of Wisconsin--Madison. Department of Civil and Environmental Engineering. Geological Engineering Program;Center for Connected and Automated Transportation (CCAT); Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2025-12-01 Report Number : GR000034956 DOI : https://doi.org/10.21231/W55Q-GM71 Huang, Zilin et al. (2025). Using Connected Intelligent Transportation To Enhance Vulnerable Road User Safety. https://doi.org/10.21231/W55Q-GM71 Huang, Zilin et al. "Using Connected Intelligent Transportation To Enhance Vulnerable Road User Safety" (2025), https://doi.org/10.21231/W55Q-GM71 Huang, Zilin et al. "Using Connected Intelligent Transportation To Enhance Vulnerable Road User Safety" , 2025, https://doi.org/10.21231/W55Q-GM71 Export RIS Citation Information. TY - Tech Report AU - Huang, Zilin AU - Wan, Zhengyang AU - Sheng, Zihao AU - Ahn, Sue AU - Noyce, David A. AU - Chen, Sikai A2 - University of Wisconsin--Madison. Department of Civil and Environmental Engineering. Geological Engineering Program A2 - Center for Connected and Automated Transportation (CCAT) A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This project leverages connected intelligent transportation technologies to enhance the safety of vulnerable road users (VRUs) within evolving urban road systems. This project targets three fundamental barriers: the lack of high-fidelity experimental platforms, localization failures in GNSS-denied areas, and insufficient trajectory prediction for heterogeneous agents. Our goal is to develop an integrated cooperative system that combines virtual reality, wireless communication, and physics-informed learning. To achieve this, we develop Sky-Drive, a distributed multi-agent simulation platform that enables human-in-the-loop interaction testing. Furthermore, the project implements a cellular Vehicle-to-Everything (C-V2X)-based cooperative localization framework to ensure lane-level accuracy and a kinematics-aware multigraph attention network for precise motion forecasting. The output of this project provides a comprehensive technological foundation for enabling the safe and equitable coexistence of autonomous vehicles (AVs) and VRUs in mixed traffic environments. AN - dot:89376 DO - https://doi.org/10.21231/W55Q-GM71 ET - Final Report, Jan 2024-Dec 2025 KW - Connected vehicles KW - Vulnerable road users KW - Traffic safety KW - Testing KW - Transportation KW - Wireless communication systems KW - Vehicle to everything communications KW - Virtual reality KW - Forecasting KW - Real-world Test LA - English PB - University of Michigan. Center for Connected and Automated Transportation PY - 2025-12-01 SN - GR000034956 TI - Using Connected Intelligent Transportation To Enhance Vulnerable Road User Safety M3 - Tech Report N1 - United States N1 - 69A3552348305 UR - https://rosap.ntl.bts.gov/view/dot/89376 ER -
Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System

Sheikh, Nauman M. ;

Bligh, Roger P.

2023-03-01 | PDF

Researchers at the Texas A&M Transportation Institute (TTI) designed and tested a Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) compliant guardrail transition system (hereafter referred to as Transition) that enables transitioning and terminating the ends of the Texas Department of Transportation MASH TL-4 guardrail system with MA ...

03/16/2026

Title : Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System Creator(s) : Sheikh, Nauman M.;Bligh, Roger P.;Schroeder, William J. L.;Kuhn, Darrell L.; Corporate Creator(s) : Texas A&M Transportation Institute Proving Ground Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2023-03-01 Report Number : FHWA/TX-23/0-7120-R1;441203-01; URL : https://rosap.ntl.bts.gov/view/dot/89375 Sheikh, Nauman M. et al. (2023). Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System. Sheikh, Nauman M. et al. "Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System" (2023) Sheikh, Nauman M. et al. "Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System" , 2023 Export RIS Citation Information. TY - Tech Report AU - Sheikh, Nauman M. AU - Bligh, Roger P. AU - Schroeder, William J. L. AU - Kuhn, Darrell L. A2 - Texas A&M Transportation Institute Proving Ground A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Researchers at the Texas A&M Transportation Institute (TTI) designed and tested a Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) compliant guardrail transition system (hereafter referred to as Transition) that enables transitioning and terminating the ends of the Texas Department of Transportation MASH TL-4 guardrail system with MASH-compliant guardrail end terminals. The researchers designed the Transition using finite element simulation analysis, details of which are presented in this report. The researchers performed vehicle impact simulations to improve the initial design concept of the Transition and developed the final design for full-scale crash testing. The researchers then constructed a test installation prototype and performed two full-scale crash tests that are also reported herein. The purpose of the tests was to assess the performance of the Transition according to the safety-performance evaluation guidelines included in the second edition of the American Association of State Highway and Transportation Officials MASH (1). The crash tests were performed in accordance with MASH TL-3 criteria, which require two crash tests:1. MASH Test 3-20: An 1100C vehicle weighing 2,420 lb. impacting the longitudinal barrier transition while traveling at 62 mi/h and 25 degrees.2. MASH Test 3-21: A 2270P vehicle weighing 5,000 lb. impacting the longitudinal barrier transition while traveling at 62 mi/h and 25 degrees. This report provides details of the Transition, the crash tests and results, and the performance assessment of the Transition for MASH TL-3 evaluation criteria for longitudinal barriers. The Transition met the MASH TL-3 performance criteria for longitudinal barriers. AN - dot:89375 ET - August 2021–November 2022 KW - Longitudinal control KW - Transition point KW - Crash tests KW - Steel KW - Guardrails KW - Beam bridges KW - Finite element method KW - Simulation KW - Manuals KW - Design KW - Evaluation KW - Performance KW - Longitudinal Barriers KW - TL-3 KW - TL-4 KW - MASH KW - Steel Post KW - W-beam LA - English PB - Texas A&M Transportation Institute Proving Ground PY - 2023-03-01 SN - FHWA/TX-23/0-7120-R1 TI - Design and Evaluation of Transition for TxDOT MASH Test Level 4 (TL-4) Guardrail System M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89375 ER -
Video Tape, A Research Implementation and Training Tool

Pederson, C. M.

1983-03-01 | PDF

The scope of this research was to the use of Tapes for research documentation and training within the Oklahoma Department of Transportation. Equipment that was acquired in this project consists of a distribution system, dubbing system, a field production system, and system. dubbing allows copies from one tape to another as well as copying from 3/4" ...

03/16/2026

Title : Video Tape, A Research Implementation and Training Tool Creator(s) : Pederson, C. M. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1983-03-01 Report Number : FHWA/OK 83 (03} URL : https://rosap.ntl.bts.gov/view/dot/89374 Pederson, C. M. (1983). Video Tape, A Research Implementation and Training Tool. Pederson, C. M. "Video Tape, A Research Implementation and Training Tool" (1983) Pederson, C. M. "Video Tape, A Research Implementation and Training Tool" , 1983 Export RIS Citation Information. TY - Tech Report AU - Pederson, C. M. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The scope of this research was to the use of Tapes for research documentation and training within the Oklahoma Department of Transportation. Equipment that was acquired in this project consists of a distribution system, dubbing system, a field production system, and system. dubbing allows copies from one tape to another as well as copying from 3/4" tape to 1/2" tape. The distribution system consists player/receivers. Each Field Division a player/receiver and the Central Office player/receiver. AN - dot:89374 ET - Final Report KW - Video KW - Information, data, and knowledge KW - Training KW - Research KW - Methodology LA - English PB - Oklahoma. Department of Transportation PY - 1983-03-01 SN - FHWA/OK 83 (03} TI - Video Tape, A Research Implementation and Training Tool M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89374 ER -
Conversion of Oklahoma Waste Coal Into Road Asphalt

Hagen, Arnulf

1983-09-01 | PDF

This report has been prepared to inform the Oklahoma Department of Transportation of the progress on the project: Conversion of Oklahoma Waste Coal into Road Asphalt, as well as to provide enough information so that co-workers at the ODOT can readily duplicate the described procedures. Part I provides background material which introduces the techni ...

03/16/2026

Title : Conversion of Oklahoma Waste Coal Into Road Asphalt Creator(s) : Hagen, Arnulf Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1983-09-01 Report Number : FHWA-OK 83(04) Final Rpt URL : https://rosap.ntl.bts.gov/view/dot/89373 Hagen, Arnulf (1983). Conversion of Oklahoma Waste Coal Into Road Asphalt. Hagen, Arnulf "Conversion of Oklahoma Waste Coal Into Road Asphalt" (1983) Hagen, Arnulf "Conversion of Oklahoma Waste Coal Into Road Asphalt" , 1983 Export RIS Citation Information. TY - Tech Report AU - Hagen, Arnulf A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report has been prepared to inform the Oklahoma Department of Transportation of the progress on the project: Conversion of Oklahoma Waste Coal into Road Asphalt, as well as to provide enough information so that co-workers at the ODOT can readily duplicate the described procedures. Part I provides background material which introduces the techniques normally used to separate and to characterize chemical samples, as well as examples of asphalt fingerprinting using these concepts. This initial effort clearly demonstrates that when a reference library of asphalts and their separation and spectroscopic properties is established, effective fingerprinting will be available. Part II describes the major effort of this project; a study of the laboratory feasibility of converting waste Oklahoma coal into an asphalt extender. This effort confirms the hypothesis that this coal can be converted into a liquid material by hydrogenation. This substance however, has no miscibility with petroleum asphalt. When animal fat or linseed oil is added to the reaction mixture prior to hydrogenation, a material is obtained which has short term miscibility with petroleum asphalt. This product has excellent chemical properties; however, it has a low penetration and ductility parameters which indicate that it would best serve as an asphalt extender. It is reasonable to assume that the fat or oil serves as a source of straight chain hydrocarbons which interact with the aromatic coal structure which is compatible with petroleum asphalt. (FHWA) AN - dot:89373 KW - Asphalt KW - Coal KW - Coal hydrogenation KW - Extenders KW - Petroleum KW - Properties of materials KW - Spectroscopic analysis KW - Waste products (Materials) LA - English PB - Oklahoma. Department of Transportation PY - 1983-09-01 SN - FHWA-OK 83(04) Final Rpt TI - Conversion of Oklahoma Waste Coal Into Road Asphalt M3 - Tech Report N1 - United States N1 - 81-05-2 2113 UR - https://rosap.ntl.bts.gov/view/dot/89373 ER -
Related Studies to Cathodic Protection of Reinforced Structures

Locke, Carl E. ;

Dehghanian, Changiz

1984-01-01 | PDF

Cathodic protection of steel in portland cement concrete requires information concerning several different areas. This report describes studies which were pointed toward developing an understanding of several of these. A study of making an asphaltic concrete conductive was accomplished using coke breeze mixed with asphalt and aggregate. Mixes conta ...

03/16/2026

Title : Related Studies to Cathodic Protection of Reinforced Structures Creator(s) : Locke, Carl E.;Dehghanian, Changiz; Corporate Creator(s) : University of Oklahoma. School of Chemical Engineering and Materials Science Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1984-01-01 Report Number : FHWA/OK 83 (06) URL : https://rosap.ntl.bts.gov/view/dot/89372 Locke, Carl E. and Dehghanian, Changiz (1984). Related Studies to Cathodic Protection of Reinforced Structures. Locke, Carl E. and Dehghanian, Changiz "Related Studies to Cathodic Protection of Reinforced Structures" (1984) Locke, Carl E. and Dehghanian, Changiz "Related Studies to Cathodic Protection of Reinforced Structures" , 1984 Export RIS Citation Information. TY - Tech Report AU - Locke, Carl E. AU - Dehghanian, Changiz A2 - University of Oklahoma. School of Chemical Engineering and Materials Science A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Cathodic protection of steel in portland cement concrete requires information concerning several different areas. This report describes studies which were pointed toward developing an understanding of several of these. A study of making an asphaltic concrete conductive was accomplished using coke breeze mixed with asphalt and aggregate. Mixes containing 45% coke breeze, 7-11% asphalt and the remainder a standard aggregate were found to be appropriate for conductive layers for cathodic protection. It was found possible to determine corrosion rates electrochemically using linear polarization. This laboratory technique gave corrosion rates similar to values obtained in other laboratories using other techniques. Testing in the laboratory and bridge decks of molybdneum-molybdneum oxide electrodes indicated these would be useful as embeddable reference electrodes in concrete. Silver-silver chloride electrodes were not found to be stable in this application. These electrochemical half-cells, MoMo03, should prove to be useful for cathodic protection systems which require controlled potentials. Reinforced concrete cylinders were exposed to cathodic protection level currents for five years. Pullout strengths and concentrations of sodium, potassium and chloride ions were determined throughout this time period. These data indicate the cathodic protection currents reduce the bond strength of the steel and concrete after about 3.5 years, due to accumulation of sodium and potassium at the interface between steel and concrete. AN - dot:89372 ET - Final Report KW - Adhesive bond strength KW - Aggregates KW - Asphalt concrete KW - Bonding KW - Bridge decks KW - Cathodic protection KW - Coke KW - Corrosion KW - Molybdenum KW - Portland cement concrete LA - English PB - Oklahoma. Department of Transportation PY - 1984-01-01 SN - FHWA/OK 83 (06) TI - Related Studies to Cathodic Protection of Reinforced Structures M3 - Tech Report N1 - United States N1 - 77-03-2 UR - https://rosap.ntl.bts.gov/view/dot/89372 ER -
Experimental Products and Equipment for Highway Construction and Maintenance [1984]

Smith, Mitchell D.

1984-01-01 | PDF

This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the ...

03/16/2026

Title : Experimental Products and Equipment for Highway Construction and Maintenance [1984] Creator(s) : Smith, Mitchell D. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1984-01-01 Report Number : FHWA/OR 84 (02) URL : https://rosap.ntl.bts.gov/view/dot/89371 Smith, Mitchell D. (1984). Experimental Products and Equipment for Highway Construction and Maintenance [1984]. Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance [1984]" (1984) Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance [1984]" , 1984 Export RIS Citation Information. TY - Tech Report AU - Smith, Mitchell D. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the progress or result of the evaluation. AN - dot:89371 ET - Annual-January, 1984 to January, 1985 KW - Adhesives KW - Admixtures KW - Annual reports KW - Bituminous materials KW - Construction equipment KW - Culverts KW - Deicing chemicals KW - Equipment KW - Fabrics KW - Herbicides KW - Highway maintenance KW - Joint fillers KW - Joint sealers KW - Testing equipment LA - English PB - Oklahoma. Department of Transportation PY - 1984-01-01 SN - FHWA/OR 84 (02) TI - Experimental Products and Equipment for Highway Construction and Maintenance [1984] M3 - Tech Report N1 - United States N1 - 73-06-1 UR - https://rosap.ntl.bts.gov/view/dot/89371 ER -
Full-Field Measurement of the Taylor-Quinney Coefficient in Tension Tests of Ti-6Al-4V, Aluminum 2024-T351, and Inconel 718 at Various Strain Rates

Smith, Jared

2020-10-01 | PDF

During plastic deformation of metals only a portion of the plastic work done on the material is expended to modify its physical properties while the remaining energy is converted to heat. The associated rise in temperature during deformation can affect the mechanical response of the material (e.g. strain hardening, thermal softening, precipitating ...

03/16/2026

Title : Full-Field Measurement of the Taylor-Quinney Coefficient in Tension Tests of Ti-6Al-4V, Aluminum 2024-T351, and Inconel 718 at Various Strain Rates Creator(s) : Smith, Jared Corporate Creator(s) : Ohio State University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2020-10-01 Report Number : DOT/FAA/TCTT-20/40 DOI : https://doi.org/10.21949/a3g4-pd12 Smith, Jared (2020). Full-Field Measurement of the Taylor-Quinney Coefficient in Tension Tests of Ti-6Al-4V, Aluminum 2024-T351, and Inconel 718 at Various Strain Rates. https://doi.org/10.21949/a3g4-pd12 Smith, Jared "Full-Field Measurement of the Taylor-Quinney Coefficient in Tension Tests of Ti-6Al-4V, Aluminum 2024-T351, and Inconel 718 at Various Strain Rates" (2020), https://doi.org/10.21949/a3g4-pd12 Smith, Jared "Full-Field Measurement of the Taylor-Quinney Coefficient in Tension Tests of Ti-6Al-4V, Aluminum 2024-T351, and Inconel 718 at Various Strain Rates" , 2020, https://doi.org/10.21949/a3g4-pd12 Export RIS Citation Information. TY - Tech Report AU - Smith, Jared A2 - Ohio State University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development A4 - Cordasco, Daniel AB - During plastic deformation of metals only a portion of the plastic work done on the material is expended to modify its physical properties while the remaining energy is converted to heat. The associated rise in temperature during deformation can affect the mechanical response of the material (e.g. strain hardening, thermal softening, precipitating localizations, etc.). At low strain rates the conditions are virtually isothermal as there is sufficient time for the heat to transfer to the surroundings. At high strain rates the temperature in the metal can increase significantly and the conditions can become nearly adiabatic as the heat cannot dissipate to the surroundings. The portion of plastic work that is converted to heat is determined by the Taylor-Quinney coefficient (β) and is quantified by measuring both the plastic work and temperature rise in a material during deformation. By including the Taylor- Quinney coefficient, complex material models can more accurately model the thermoplastic deformation of the material over a wide range of strains, strain rates, and temperatures. AN - dot:89370 DO - https://doi.org/10.21949/a3g4-pd12 KW - Plastics KW - Thermoplastic materials KW - Strain hardening KW - Infrared detectors KW - Taylor-Quinney KW - Thermal softening KW - Localization KW - Split- KW - Hopkinson bar KW - Digital image correlation KW - Aluminum 2024-T351, Ti-6Al-4V KW - Inconel 718 LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2020-10-01 SN - DOT/FAA/TCTT-20/40 TI - Full-Field Measurement of the Taylor-Quinney Coefficient in Tension Tests of Ti-6Al-4V, Aluminum 2024-T351, and Inconel 718 at Various Strain Rates M3 - Tech Report N1 - United States N1 - 16-G-007 UR - https://rosap.ntl.bts.gov/view/dot/89370 ER -
A Generalized Orthotropic Elasto-Plastic Material Model for Impact Analysis

Hoffarth, Canio

2017-10-01 | PDF

Composite materials are now beginning to provide uses hitherto reserved for metals in structural systems such as airframes and engine containment systems, wraps for repair and rehabilitation, and ballistic/blast mitigation systems. These structural systems are often subjected to impact loads and there is a pressing need for accurate prediction of d ...

03/16/2026

Title : A Generalized Orthotropic Elasto-Plastic Material Model for Impact Analysis Creator(s) : Hoffarth, Canio Corporate Creator(s) : Arizona State University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2017-10-01 Report Number : DOT/FAA/TC-TT17/54 DOI : https://doi.org/10.21949/49jh-1313 Hoffarth, Canio (2017). A Generalized Orthotropic Elasto-Plastic Material Model for Impact Analysis. https://doi.org/10.21949/49jh-1313 Hoffarth, Canio "A Generalized Orthotropic Elasto-Plastic Material Model for Impact Analysis" (2017), https://doi.org/10.21949/49jh-1313 Hoffarth, Canio "A Generalized Orthotropic Elasto-Plastic Material Model for Impact Analysis" , 2017, https://doi.org/10.21949/49jh-1313 Export RIS Citation Information. TY - Tech Report AU - Hoffarth, Canio A2 - Arizona State University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development A4 - Cordasco, Daniel AB - Composite materials are now beginning to provide uses hitherto reserved for metals in structural systems such as airframes and engine containment systems, wraps for repair and rehabilitation, and ballistic/blast mitigation systems. These structural systems are often subjected to impact loads and there is a pressing need for accurate prediction of deformation, damage and failure. There are numerous material models that have been developed to analyze the dynamic impact response of polymer matrix composites. However, there are key features that are missing in those models that prevent them from providing accurate predictive capabilities. In this dissertation, a general purpose orthotropic elasto-plastic computational constitutive material model has been developed to predict the response of composites subjected to high velocity impacts. The constitutive model is divided into three components – deformation model, damage model and failure model, with failure to be added at a later date. The deformation model generalizes the Tsai-Wu failure criteria and extends it using a strain-hardening-based orthotropic yield function with a non-associative flow rule. A strain equivalent formulation is utilized in the damage model that permits plastic and damage calculations to be uncoupled and capture the nonlinear unloading and local softening of the stress-strain response. A diagonal damage tensor is defined to account for the directionally dependent variation of damage. However, in composites it has been found that loading in one direction can lead to damage in multiple coordinate directions. To account for this phenomena, the terms in the damage matrix are semi-coupled such that the damage in a particular coordinate direction is a function of the stresses and plastic strains in all of the coordinate directions. The overall framework is driven by experimental tabulated temperature and rate-dependent stress-strain data as well as data that characterizes the damage matrix and failure. The developed theory has been implemented in a commercial explicit finite element analysis code, LS-DYNA®, as MAT213. Several verification and validation tests using a commonly available carbon-fiber composite, Toyobo’s T800/F3900, have been carried and the results show that the theory and implementation are efficient, robust and accurate. AN - dot:89369 DO - https://doi.org/10.21949/49jh-1313 ET - Final Report KW - Composite materials KW - Engineering tolerances KW - Mechanical failure KW - Shear strain KW - Aviation KW - Impact loads KW - Temperature KW - Plasticity KW - Orthotropic KW - Mechanical elasticity KW - T800/F3900 KW - MAT213 KW - LS-DYNA LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2017-10-01 SN - DOT/FAA/TC-TT17/54 TI - A Generalized Orthotropic Elasto-Plastic Material Model for Impact Analysis M3 - Tech Report N1 - United States N1 - 12-G-001 UR - https://rosap.ntl.bts.gov/view/dot/89369 ER -
Technical Appendix: Mapping High-Quality Transit

Wasserman, Jacob L.

;

Barrall, Aaron

2026-03-01 | PDF

“Major transit stop”: how these three words are defined determines what can be built where, throughout much of California. In order to address housing supply constraints, the state legislature has enacted a number of laws that streamline approval and remove zoning constraints in areas close to high-quality transit. But what, exactly, is a “major tr ...

03/16/2026

Title : Technical Appendix: Mapping High-Quality Transit Creator(s) : Wasserman, Jacob L.;Barrall, Aaron;Millard-Ball, Adam;Lee, Amy; Corporate Creator(s) : University of California, Davis, Institute of Transportation Studies;Lewis Center for Regional Policy Studies; Corporate Contributor(s) : University of California Institute of Transportation Studies Published Date : 2026-03-01 Report Number : UC-ITS-2025-16 URL : https://rosap.ntl.bts.gov/view/dot/89368 Wasserman, Jacob L. et al. (2026). Technical Appendix: Mapping High-Quality Transit. Wasserman, Jacob L. et al. "Technical Appendix: Mapping High-Quality Transit" (2026) Wasserman, Jacob L. et al. "Technical Appendix: Mapping High-Quality Transit" , 2026 Export RIS Citation Information. TY - Tech Report AU - Wasserman, Jacob L. AU - Barrall, Aaron AU - Millard-Ball, Adam AU - Lee, Amy A2 - University of California, Davis, Institute of Transportation Studies A2 - Lewis Center for Regional Policy Studies A3 - University of California Institute of Transportation Studies AB - “Major transit stop”: how these three words are defined determines what can be built where, throughout much of California. In order to address housing supply constraints, the state legislature has enacted a number of laws that streamline approval and remove zoning constraints in areas close to high-quality transit. But what, exactly, is a “major transit stop”? Planners, developers, and elected officials construe the sparse definition in state law in many ways — though genuine interpretive disagreement, due to modeling and data constraints, and/or in order to serve political goals of encouraging or stymying development. Differences in interpreting the definition of “major transit stop” collectively make a big difference in what areas are covered by state zoning incentives. A maximal approach to defining “major transit stop” grows the eligible area by over three times more than a minimal approach. The area within half a mile of a major transit stop has generally increased over time. But areas with low vehicle travel are doing more to drive affordable housing eligibility than areas with quality transit. Finally, tying transit service to land use regulations has created a perverse incentive to cut transit service in order to avoid state housing mandates. AN - dot:89368 ET - Technical Appendix (October 2024 – March 2026) KW - Transit centers KW - Routes KW - Headways KW - Data collection KW - Information processing KW - Zoning KW - Land use KW - Housing KW - Development KW - Mapping KW - Legislation LA - English PB - University of California Institute of Transportation Studies PY - 2026-03-01 SN - UC-ITS-2025-16 TI - Technical Appendix: Mapping High-Quality Transit M3 - Tech Report N1 - United States N1 - UC-ITS-2025-16 UR - https://rosap.ntl.bts.gov/view/dot/89368 ER -
Repair of Bridge Deck Fascias

Cakmak, Furkan ;

Menkulasi, Fatmir

2023-09-30 | PDF

The relatively high supply of moisture in bridge deck fascias often causes them to deteriorate more quickly than other portions of the bridge. This causes the fascia concrete to become de-bonded from the reinforcement and fall, posing a safety hazard to traffic or pedestrians beneath the bridge. A related concern is that the deterioration of the co ...

03/16/2026

Title : Repair of Bridge Deck Fascias Creator(s) : Cakmak, Furkan;Menkulasi, Fatmir;Eamon, Christopher D.;Wu, Hwai-Chung; Corporate Creator(s) : Reinforcement Innovations;Wayne State University; Corporate Contributor(s) : Michigan. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2023-09-30 Report Number : SPR-1730 URL : https://rosap.ntl.bts.gov/view/dot/89367 Cakmak, Furkan et al. (2023). Repair of Bridge Deck Fascias. Cakmak, Furkan et al. "Repair of Bridge Deck Fascias" (2023) Cakmak, Furkan et al. "Repair of Bridge Deck Fascias" , 2023 Export RIS Citation Information. TY - Tech Report AU - Cakmak, Furkan AU - Menkulasi, Fatmir AU - Eamon, Christopher D. AU - Wu, Hwai-Chung A2 - Reinforcement Innovations A2 - Wayne State University A3 - Michigan. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The relatively high supply of moisture in bridge deck fascias often causes them to deteriorate more quickly than other portions of the bridge. This causes the fascia concrete to become de-bonded from the reinforcement and fall, posing a safety hazard to traffic or pedestrians beneath the bridge. A related concern is that the deterioration of the connection between the barrier and deck may significantly degrade the crashworthiness of the barrier, thus undermining its main function. A literature review, nationwide survey, and several examinations of bridges in Michigan that exhibit bridge deck fascia deterioration were conducted with the goal of determining the cause of the deterioration. Alternative repair details were developed. The repair details were divided into two categories: 1) restoration of original geometry and strength, and 2) maintain current geometry and prevent further deterioration. The restoration of original geometry and strength requires drilling and epoxying dowels and using a repair cementitious material. Small-scale and large-scale testing was conducted with the goal of evaluating the proposed repair detail for restoring the original geometry and strength. A computer program called MDOT Barrier was developed to evaluate the crashworthiness of bridge barriers that feature deck fascia deterioration and to determine whether intervention is required. Guidelines for designing and detailing future repair details and new barrier to deck overhang connections were developed. A special provision for the repair of bridge deck fascia and an implementation plan was prepared. It was determined that the main cause of deck fascia deterioration was the excessive amount of moisture which led to reinforcement corrosion and freeze-thaw deterioration. Several alternative details aimed at reducing the moisture content in the deck fascia were developed for new bridges. For cases, when a repair is required, two repair concrete materials combined with epoxy coated dowels, which are drilled and epoxied into the existing deck were proposed: 1) a self-consolidating concrete mix, and 2) a fiber reinforced self-consolidating concrete mix. The proposed repair details were proved viable through small-scale and large-scale testing. Small-scale testing included tests for: 1) material characterization; 2) relative material durability; and 3) strength of the repair concrete host concrete interface to direct shear. The FRSCC was deemed as the most appropriate mixture as it possesses self-consolidating properties, and good initial and sustained tensile strength. The proposed repair detail was evaluated at full scale using barrier deck subassemblies. A total of three tests were conducted. Both selected repair concrete materials were able to provide the equivalent of TL-4 level crashworthiness. It was demonstrated that both hooked and straight rebars in the deck overhang were able to transfer forces form the barrier to the deck during vehicle impact. AN - dot:89367 ET - Final Report, 10/1/2021 - 09/30/2023 KW - Deterioration KW - Corrosion KW - Freeze thaw tests KW - Repairing KW - Crashworthiness KW - Surface treating KW - Corrosion resistance KW - Material reinforcement KW - Field tests KW - Core samples KW - Bridge decks KW - Literature reviews KW - Evaluation KW - Deck fascia KW - deterioration mechanism KW - corrosion resistant reinforcement LA - English PB - Michigan. Department of Transportation PY - 2023-09-30 SN - SPR-1730 TI - Repair of Bridge Deck Fascias M3 - Tech Report N1 - United States N1 - 2019-0314Z2 UR - https://rosap.ntl.bts.gov/view/dot/89367 ER -
Evaluation of Electronic Enforcement of Motor Carrier Compliance and Safety

Hernandez, Salvador

;

Anderson, Jason C.

2025-04-01 | PDF

This study evaluates the implementation of electronic enforcement. A review of electronic enforcement technology was conducted, and best practices of electronic enforcement were documented. Using inspection and violation data, a statewide and site-specific analysis were conducted to determine violations that occurred most often. Upon identification ...

03/16/2026

Title : Evaluation of Electronic Enforcement of Motor Carrier Compliance and Safety Creator(s) : Hernandez, Salvador;Anderson, Jason C.;Timilsina, Namu; Corporate Creator(s) : Oregon State University;Portland State University; Corporate Contributor(s) : Oregon. Department of Transportation. Research Section;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-04-01 Report Number : FHWA-OR-RD-26-07 URL : https://rosap.ntl.bts.gov/view/dot/89366 Hernandez, Salvador et al. (2025). Evaluation of Electronic Enforcement of Motor Carrier Compliance and Safety. Hernandez, Salvador and Anderson, Jason C. and Timilsina, Namu "Evaluation of Electronic Enforcement of Motor Carrier Compliance and Safety" (2025) Hernandez, Salvador et al. "Evaluation of Electronic Enforcement of Motor Carrier Compliance and Safety" , 2025 Export RIS Citation Information. TY - Tech Report AU - Hernandez, Salvador AU - Anderson, Jason C. AU - Timilsina, Namu A2 - Oregon State University A2 - Portland State University A3 - Oregon. Department of Transportation. Research Section A3 - United States. Department of Transportation. Federal Highway Administration AB - This study evaluates the implementation of electronic enforcement. A review of electronic enforcement technology was conducted, and best practices of electronic enforcement were documented. Using inspection and violation data, a statewide and site-specific analysis were conducted to determine violations that occurred most often. Upon identification of the most occurring violations, a series of site-specific benefit-cost analyses were conducted to identify electronic enforcement technologies that can be implemented with economic justification. Electronic enforcement technologies to address driver-related violations and vehicle-related violations were considered. The results from the benefit-cost analysis were used to rank-order locations for potential implementation based on the mean return-on-investment over a range of estimated implementation costs. This study concludes by providing a comprehensive conclusion and recommendations. AN - dot:89366 ET - Draft Final Report KW - Law enforcement KW - Best practices KW - Freight service KW - Benefit cost analysis KW - Safety KW - Evaluation KW - Compliance KW - Motor carriers KW - Return on investment KW - Implementation KW - Data collection KW - Electronic control KW - Traffic violations LA - English PB - Oregon. Department of Transportation. Research Section PY - 2025-04-01 SN - FHWA-OR-RD-26-07 TI - Evaluation of Electronic Enforcement of Motor Carrier Compliance and Safety M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89366 ER -
Windpower Demonstration Project

Bergey, Karl H. ;

Craig, Kenneth

1984-06-01 | PDF

A wind power demonstration program was carried out to assess the potential of wind power energy for highway uses in Oklahoma. A secondary purpose of the program was to provide information for the public on the use of wind power for more general applications. Winds peed measuring equipment was installed at the Erick Information Center along I-40 in ...

03/16/2026

Title : Windpower Demonstration Project Creator(s) : Bergey, Karl H.;Craig, Kenneth; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division Published Date : 1984-06-01 Report Number : FHWA/OK-84(6) URL : https://rosap.ntl.bts.gov/view/dot/89365 Bergey, Karl H. and Craig, Kenneth (1984). Windpower Demonstration Project. Bergey, Karl H. and Craig, Kenneth "Windpower Demonstration Project" (1984) Bergey, Karl H. and Craig, Kenneth "Windpower Demonstration Project" , 1984 Export RIS Citation Information. TY - Tech Report AU - Bergey, Karl H. AU - Craig, Kenneth A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division AB - A wind power demonstration program was carried out to assess the potential of wind power energy for highway uses in Oklahoma. A secondary purpose of the program was to provide information for the public on the use of wind power for more general applications. Winds peed measuring equipment was installed at the Erick Information Center along I-40 in Western Oklahoma and at the Oklahoma DOT Maintenance Yard at Hydro, west of Oklahoma City, A wind power generator with a nomina1 rating of 25 kw was installed on a 60-ft tower at the Erick site. From a reliability standpoint, the wind power generator performed satisfactorily. Its availability for the one-year test period was 94%. Its annual energy output, however, was less than expected, primarily due to the lower than expected wind speed at the Erick site. The measured windspeed was approximately 25% 1ower than predicted on the basis of long-term recorded data from the Department of Commerce. Further testing and analysis will be required to determine whether the low average windspeeds represent an anomaly or a long-term trend that differs significantly from earlier Department of Commerce data. AN - dot:89365 ET - Final Report KW - Wind power generation KW - Solar energy KW - Renewable energy sources KW - Wind KW - Anemometry LA - English PB - Oklahoma. Department of Transportation PY - 1984-06-01 SN - FHWA/OK-84(6) TI - Windpower Demonstration Project M3 - Tech Report N1 - United States N1 - DTFH71-R1-52-0K-03 UR - https://rosap.ntl.bts.gov/view/dot/89365 ER -
Comprehensive Study on the Behavior of Steel Girder Bridges

Masoudi, Mohammad Javad ;

Song, Wei

2025-11-30 | PDF

This research investigates the impact of cross-frame detailing on the behavior of horizontally curved and skewed steel I-girder bridges. An analysis procedure based on three-dimensional (3D) finite element (FE) method is developed to accurately capture the complex behavior of steel girder bridges with various cross-frame detailing methods. By follo ...

03/16/2026

Title : Comprehensive Study on the Behavior of Steel Girder Bridges Creator(s) : Masoudi, Mohammad Javad;Song, Wei; Corporate Creator(s) : University of Alabama, Tuscaloosa Corporate Contributor(s) : Alabama. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-11-30 Report Number : FHWA/CA/OR URL : https://rosap.ntl.bts.gov/view/dot/89364 Masoudi, Mohammad Javad and Song, Wei (2025). Comprehensive Study on the Behavior of Steel Girder Bridges. Masoudi, Mohammad Javad and Song, Wei "Comprehensive Study on the Behavior of Steel Girder Bridges" (2025) Masoudi, Mohammad Javad and Song, Wei "Comprehensive Study on the Behavior of Steel Girder Bridges" , 2025 Export RIS Citation Information. TY - Tech Report AU - Masoudi, Mohammad Javad AU - Song, Wei A2 - University of Alabama, Tuscaloosa A3 - Alabama. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This research investigates the impact of cross-frame detailing on the behavior of horizontally curved and skewed steel I-girder bridges. An analysis procedure based on three-dimensional (3D) finite element (FE) method is developed to accurately capture the complex behavior of steel girder bridges with various cross-frame detailing methods. By following this procedure, a sophisticated FE model of a representative bridge is developed in Abaqus, utilizing its shell elements, and incorporating geometric and material nonlinearities, stress redistribution, and locked-in forces. The analyses assess three cross-frame detailing methods, No-Load Fit (NLF), Steel Dead Load Fit (SDLF), and Total Dead Load Fit (TDLF), with respect to girder deflections, cross-frame forces, layovers, and stress distributions. Findings demonstrate that detailing methods significantly affect cross-frame erection-stage initial forces and final locked-in forces, while having little impact on global deflections, layovers, or overall girder stresses. With the representative bridge, the TDLF method achieves the lowest locked-in forces but requires the largest erection efforts, the NLF method yields the opposite effects, and the SDLF method provides a balanced result between the two. The research provides a promising numerical procedure for analyzing cross-frame detailing to improve constructability and bridge performance and can support the development of generalized criteria for selecting appropriate cross-frame fitting strategies as a function of bridge design. AN - dot:89364 ET - Final Report: January 1, 2017 to September 30, 2025 KW - Curved beams KW - Steel KW - Girder bridges KW - Skewed structures KW - Finite element method KW - Horizontal supports KW - Deflectometers KW - Bridge performance KW - Cross-frame detailing methods KW - Locked-in forces LA - English PB - Alabama. Department of Transportation PY - 2025-11-30 SN - FHWA/CA/OR TI - Comprehensive Study on the Behavior of Steel Girder Bridges M3 - Tech Report N1 - United States N1 - 930-939 (GR 25905) UR - https://rosap.ntl.bts.gov/view/dot/89364 ER -
Georgia: Bridge Over Interstate 75, Henry County: Tentative Site

United States. Department of Transportation. Federal Highway Administration

1997-01-01 | PDF

This HPC bridge project is being conducted by the Georgia Department of Transportation (GADOT). Funding for this project comes from GADOT, FHWA, and 10 states that pooled their research funds. The project is being conducted in cooperation with the Georgia Institute of Technology. The objective is to design, construct, test and evaluate a highway br ...

03/16/2026

Title : Georgia: Bridge Over Interstate 75, Henry County: Tentative Site Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Simon, Marcia;Crane, Richard;Burch, Ted;Deaver, Rick; Published Date : 1997-01-01 Report Number : FHWA-RD-97-057 URL : https://rosap.ntl.bts.gov/view/dot/89363 United States. Department of Transportation. Federal Highway Administration (1997). Georgia: Bridge Over Interstate 75, Henry County: Tentative Site. United States. Department of Transportation. Federal Highway Administration "Georgia: Bridge Over Interstate 75, Henry County: Tentative Site" (1997) United States. Department of Transportation. Federal Highway Administration "Georgia: Bridge Over Interstate 75, Henry County: Tentative Site" , 1997 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Simon, Marcia A4 - Crane, Richard A4 - Burch, Ted A4 - Deaver, Rick AB - This HPC bridge project is being conducted by the Georgia Department of Transportation (GADOT). Funding for this project comes from GADOT, FHWA, and 10 states that pooled their research funds. The project is being conducted in cooperation with the Georgia Institute of Technology. The objective is to design, construct, test and evaluate a highway bridge in the Atlanta area utilizing HPC AASHTO prestressed concrete beam shapes and an HPC composite deck. AN - dot:89363 KW - Design build KW - Design KW - Girder bridges KW - High performance concrete KW - Prestressed concrete bridges KW - Prestressed concrete KW - Bridges KW - High-Performance Concrete program LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 1997-01-01 SN - FHWA-RD-97-057 TI - Georgia: Bridge Over Interstate 75, Henry County: Tentative Site M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89363 ER -
Determination of Interrelationships between Organizational System Variables during Implementation of Change: Preliminary Findings of Qualitative [Research. Report 1 of 17]

Singh, Amarjit

1997-03-18 | PDF

Qualitative studies were undertaken by having group. discussions and one-on-one interview sessions with all engineers working for the Oahu District. Among the positive findings are that there is adequate team work, engineers are motivated by the nature of work and challenges posed, engineers wish to enhance their knowledge, and job responsibilities ...

03/16/2026

Title : Determination of Interrelationships between Organizational System Variables during Implementation of Change: Preliminary Findings of Qualitative [Research. Report 1 of 17] Creator(s) : Singh, Amarjit Corporate Creator(s) : University of Hawaii (Honolulu) Corporate Contributor(s) : Hawaii. Department of Transportation. Highways Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1997-03-18 Report Number : HWY-L-UH-96-01 URL : https://rosap.ntl.bts.gov/view/dot/89362 Singh, Amarjit (1997). Determination of Interrelationships between Organizational System Variables during Implementation of Change: Preliminary Findings of Qualitative [Research. Report 1 of 17]. Singh, Amarjit "Determination of Interrelationships between Organizational System Variables during Implementation of Change: Preliminary Findings of Qualitative [Research. Report 1 of 17]" (1997) Singh, Amarjit "Determination of Interrelationships between Organizational System Variables during Implementation of Change: Preliminary Findings of Qualitative [Research. Report 1 of 17]" , 1997 Export RIS Citation Information. TY - Tech Report AU - Singh, Amarjit A2 - University of Hawaii (Honolulu) A3 - Hawaii. Department of Transportation. Highways Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Qualitative studies were undertaken by having group. discussions and one-on-one interview sessions with all engineers working for the Oahu District. Among the positive findings are that there is adequate team work, engineers are motivated by the nature of work and challenges posed, engineers wish to enhance their knowledge, and job responsibilities were clear. AB - Among the negative findings are that the change order procedure is unduly cumbersome, design-construction coordination and integration is inadequate, and engineers have insufficient knowledge and training in their construction management vocation. Oahu District engineers perceive a complete lack of trust, faith, or support from upper management. AB - There is a lack of formal motivation by HOOT; organization structure is inadequate to respond to tasks; some field offices have serious management and morale problems; and janitorial work is disliked. Whereas the recent induction of computers is a positive change, quite a few engineers were not sure how to use them. Resident engineers reported difficulties with CE Ill's and inspectors alike. Inspectors reported inexperience and the unwillingness of engineers to do field work as a reason for poor engineering caliber. AB - Among the recommendations are to downsize, increase specialization, increase workload of engineers, delegate more authority to all level of engineers, streamline change order process, create new sub-divisions for planning and scheduling and claims and change orders, increase standards for hiring inspectors, consider making contractor responsible for quality control, and curtail the new hiring at CE III level. The organization structure should be revamped. AN - dot:89362 ET - Association Findings KW - Construction management KW - Coordination KW - Downsizing KW - Engineering KW - Inspectors KW - Reorganization KW - Job satisfaction KW - Cooperation LA - English PB - Hawaii. Department of Transportation. Highways Division PY - 1997-03-18 SN - HWY-L-UH-96-01 TI - Determination of Interrelationships between Organizational System Variables during Implementation of Change: Preliminary Findings of Qualitative [Research. Report 1 of 17] M3 - Tech Report N1 - United States N1 - 41527 UR - https://rosap.ntl.bts.gov/view/dot/89362 ER -
Creating a Data Science Competition for Intersection Safety Systems — Insights from the U.S. DOT Intersection Safety Challenge Stage 1B System Assessment and Virtual Testing

Goli, Mohammad ;

Townsend, Haley

2026-02-01 | PDF

To assess the technological maturity of data fusion and artificial intelligence (AI) capabilities of intersection safety systems (ISS), the U.S. DOT designed the Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing as a data science competition. For this data science competition, the U.S. DOT collected and provided real-wor ...

03/13/2026

Title : Creating a Data Science Competition for Intersection Safety Systems — Insights from the U.S. DOT Intersection Safety Challenge Stage 1B System Assessment and Virtual Testing Creator(s) : Goli, Mohammad;Townsend, Haley;Scarano, Stephen;Seshadri, Anand;Young, Caden;Silverstein, Claire;Wang, Peiwei;Wunderlich, Karl; Corporate Creator(s) : Noblis, Inc. Corporate Contributor(s) : United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office Published Date : 2026-02-01 Report Number : FHWA-JPO-26-005 URL : https://rosap.ntl.bts.gov/view/dot/89361 Goli, Mohammad et al. (2026). Creating a Data Science Competition for Intersection Safety Systems — Insights from the U.S. DOT Intersection Safety Challenge Stage 1B System Assessment and Virtual Testing. Goli, Mohammad et al. "Creating a Data Science Competition for Intersection Safety Systems — Insights from the U.S. DOT Intersection Safety Challenge Stage 1B System Assessment and Virtual Testing" (2026) Goli, Mohammad et al. "Creating a Data Science Competition for Intersection Safety Systems — Insights from the U.S. DOT Intersection Safety Challenge Stage 1B System Assessment and Virtual Testing" , 2026 Export RIS Citation Information. TY - Tech Report AU - Goli, Mohammad AU - Townsend, Haley AU - Scarano, Stephen AU - Seshadri, Anand AU - Young, Caden AU - Silverstein, Claire AU - Wang, Peiwei AU - Wunderlich, Karl A2 - Noblis, Inc. A3 - United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office A4 - Ocel, Norah AB - To assess the technological maturity of data fusion and artificial intelligence (AI) capabilities of intersection safety systems (ISS), the U.S. DOT designed the Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing as a data science competition. For this data science competition, the U.S. DOT collected and provided real-world sensor data from a controlled test intersection at the Federal Highway Administration’s (FHWA’s) Turner-Fairbank Highway Research Center (TFHRC) in McLean, VA. The data was collected over several months of operation in 2023 and 2024 from multiple roadway sensors of different types (e.g., camera, Light Detection and Ranging [LiDAR], radar, thermal camera) and covered multiple scenarios, including non-conflicts, potential conflicts, and actual collisions between vehicles and pedestrians. Please note that surrogate pedestrians were used when necessary, and no one was harmed in the data collection process. The purpose of this document is to describe the impetus, assumptions, practical considerations, evolution, and lessons learned for designing and facilitating a data science competition for AI-based ISS, grounded in experiences from the U.S. DOT Intersection Safety Challenge Stage 1B. AN - dot:89361 ET - Final Report KW - Safety KW - Transportation safety KW - Artificial intelligence KW - Machine learning KW - Sensors KW - Data fusion KW - Calibration KW - Intersections KW - Predictive models KW - Pedestrians KW - Evaluation LA - English PB - United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office (ITS JPO) PY - 2026-02-01 SN - FHWA-JPO-26-005 TI - Creating a Data Science Competition for Intersection Safety Systems — Insights from the U.S. DOT Intersection Safety Challenge Stage 1B System Assessment and Virtual Testing M3 - Tech Report N1 - United States N1 - 693JJ321D000021 UR - https://rosap.ntl.bts.gov/view/dot/89361 ER -
Insights from the U.S. DOT Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing Primary Track Competition

Scarano, Stephen ;

Silverstein, Claire

2025-06-01 | PDF

In response to growing concerns regarding the safety of vulnerable road users at intersections, the U.S. Department of Transportation launched the Intersection Safety Challenge in Spring 2023 with the vision to transform intersection safety through the development of innovative intersection safety systems that can identify, predict, and mitigate un ...

03/13/2026

Title : Insights from the U.S. DOT Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing Primary Track Competition Creator(s) : Scarano, Stephen;Silverstein, Claire;Seshadri, Anand;Townsend, Haley;Wang, Peiwei;Wunderlich, Karl E;Thompson, Blake; Corporate Creator(s) : Noblis, Inc. Corporate Contributor(s) : United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office Published Date : 2025-06-01 Report Number : FHWA-JPO-25-157 URL : https://rosap.ntl.bts.gov/view/dot/89360 Scarano, Stephen et al. (2025). Insights from the U.S. DOT Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing Primary Track Competition. Scarano, Stephen et al. "Insights from the U.S. DOT Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing Primary Track Competition" (2025) Scarano, Stephen et al. "Insights from the U.S. DOT Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing Primary Track Competition" , 2025 Export RIS Citation Information. TY - Tech Report AU - Scarano, Stephen AU - Silverstein, Claire AU - Seshadri, Anand AU - Townsend, Haley AU - Wang, Peiwei AU - Wunderlich, Karl E AU - Thompson, Blake A2 - Noblis, Inc. A3 - United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office A4 - Ocel, Norah AB - In response to growing concerns regarding the safety of vulnerable road users at intersections, the U.S. Department of Transportation launched the Intersection Safety Challenge in Spring 2023 with the vision to transform intersection safety through the development of innovative intersection safety systems that can identify, predict, and mitigate unsafe conditions involving vehicles and vulnerable road users in real time. The Challenge began with Stage 1, which had two substages—Stage 1A: Concept Assessment and Stage 1B: System Assessment and Virtual Testing. For Stage 1A, participants submitted design concepts for their proposed systems. The U.S. Department of Transportation received 120 innovative concept papers and selected 15 for prize awards. The 15 winners of Stage 1A were invited to participate in the Stage 1B Primary Track data science competition using multi-sensor data collected at the Turner- Fairbank Highway Research Center Smart Intersection facility. AN - dot:89360 ET - Final Report KW - Intersections KW - Safety KW - Artificial intelligence KW - Data fusion KW - Restricted crossing U turn intersections KW - Pedestrian safety KW - Transportation safety KW - Conflict prediction LA - English PB - United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office (ITS JPO) PY - 2025-06-01 SN - FHWA-JPO-25-157 TI - Insights from the U.S. DOT Intersection Safety Challenge Stage 1B: System Assessment and Virtual Testing Primary Track Competition M3 - Tech Report N1 - United States N1 - 693JJ321D000021 UR - https://rosap.ntl.bts.gov/view/dot/89360 ER -
Buckle Up Phone Down in Jackson, Mississippi and Sioux Falls, South Dakota [Traffic Tech]

Tucker, Annette ;

Ostergaard, Melissa

2026-03-01 | PDF

This Traffic Tech briefly summarizes the results of process and outcome evaluations conducted for the Buckle Up Phone Down program implemented in two demonstration cities. The Traffic Tech additionally includes a summary of the implementation of the demonstration programs.

03/12/2026

Title : Buckle Up Phone Down in Jackson, Mississippi and Sioux Falls, South Dakota [Traffic Tech] Creator(s) : Tucker, Annette;Ostergaard, Melissa;Selden, R. Z., Jr; Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Behavioral Safety Research Published Date : 2026-03-01 Report Number : DOT HS 813 760 DOI : https://doi.org/10.21949/g2ct-v404 Tucker, Annette et al. (2026). Buckle Up Phone Down in Jackson, Mississippi and Sioux Falls, South Dakota [Traffic Tech]. https://doi.org/10.21949/g2ct-v404 Tucker, Annette and Ostergaard, Melissa and Selden, R. Z., Jr "Buckle Up Phone Down in Jackson, Mississippi and Sioux Falls, South Dakota [Traffic Tech]" (2026), https://doi.org/10.21949/g2ct-v404 Tucker, Annette et al. "Buckle Up Phone Down in Jackson, Mississippi and Sioux Falls, South Dakota [Traffic Tech]" , 2026, https://doi.org/10.21949/g2ct-v404 Export RIS Citation Information. TY - Brief AU - Tucker, Annette AU - Ostergaard, Melissa AU - Selden, R. Z., Jr A2 - United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Behavioral Safety Research AB - This Traffic Tech briefly summarizes the results of process and outcome evaluations conducted for the Buckle Up Phone Down program implemented in two demonstration cities. The Traffic Tech additionally includes a summary of the implementation of the demonstration programs. AN - dot:89359 DO - https://doi.org/10.21949/g2ct-v404 ET - Traffic Tech KW - Distraction KW - Drivers KW - Highway safety KW - Safety campaigns KW - Seat belt use LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 2026-03-01 SN - DOT HS 813 760 TI - Buckle Up Phone Down in Jackson, Mississippi and Sioux Falls, South Dakota [Traffic Tech] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89359 ER -
2026 Spring DLC: National Transportation Library Resources and Services

Alleman, Rosalyn

2026-03-04 | PDF

The National Transportation Library (NTL) is a born-digital library which collects Government-funded transportation research and other materials, provides reference services to the public, coordinates the National Transportation Knowledge Network, and supports BTS transportation statistical data products. Created by the Transportation Equity Act fo ...

03/09/2026

Supporting Files

Title : 2026 Spring DLC: National Transportation Library Resources and Services Creator(s) : Alleman, Rosalyn Corporate Creator(s) : United States. Department of Transportation. National Transportation Library Published Date : 2026-03-04 DOI : https://doi.org/10.21949/86mp-hk36 Alleman, Rosalyn (2026). 2026 Spring DLC: National Transportation Library Resources and Services. https://doi.org/10.21949/86mp-hk36 Alleman, Rosalyn "2026 Spring DLC: National Transportation Library Resources and Services" (2026), https://doi.org/10.21949/86mp-hk36 Alleman, Rosalyn "2026 Spring DLC: National Transportation Library Resources and Services" , 2026, https://doi.org/10.21949/86mp-hk36 Export RIS Citation Information. TY - Presentations AU - Alleman, Rosalyn A2 - United States. Department of Transportation. National Transportation Library AB - The National Transportation Library (NTL) is a born-digital library which collects Government-funded transportation research and other materials, provides reference services to the public, coordinates the National Transportation Knowledge Network, and supports BTS transportation statistical data products. Created by the Transportation Equity Act for the 21st Century, it is funded under the highway trust fund laws that are passed every five years. NTL also hosts the USDOT archives, and our historian/archivist manages that collection and makes materials available to DOT staff and the public. AB - Video recording available at: https://www.fdlp.gov/training/2026-spring-dlc-national-transportation-library-resources-and-services AN - dot:89358 DO - https://doi.org/10.21949/86mp-hk36 KW - Libraries KW - Library operations KW - Collection development KW - Digitization KW - Transportation departments KW - Federal government agencies KW - Archives LA - English PB - United States. Federal Depository Library Program PY - 2026-03-04 TI - 2026 Spring DLC: National Transportation Library Resources and Services M3 - Presentations N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89358 ER -
Evaluation of Oklahoma Pavement Design Procedures

Nixon, John F. ;

Kabir, Jobaid

1995-08-01 | PDF

This report covers the results of Phases II and III of the research project. Based upon the findings of this study, recommendations were made for possible improvement of the currently used design and management procedures. Specific recommendations were made for improved material specifications to avoid stripping in the pavement structure as this wa ...

03/09/2026

Title : Evaluation of Oklahoma Pavement Design Procedures Creator(s) : Nixon, John F.;Kabir, Jobaid;McCullough, Frank;Finn, Fred; Corporate Creator(s) : ARE Inc. Corporate Contributor(s) : Oklahoma. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 1995-08-01 Report Number : FHWA/OK 85 (01) URL : https://rosap.ntl.bts.gov/view/dot/89357 Nixon, John F. et al. (1995). Evaluation of Oklahoma Pavement Design Procedures. Nixon, John F. et al. "Evaluation of Oklahoma Pavement Design Procedures" (1995) Nixon, John F. et al. "Evaluation of Oklahoma Pavement Design Procedures" , 1995 Export RIS Citation Information. TY - Tech Report AU - Nixon, John F. AU - Kabir, Jobaid AU - McCullough, Frank AU - Finn, Fred A2 - ARE Inc. A3 - Oklahoma. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This report covers the results of Phases II and III of the research project. Based upon the findings of this study, recommendations were made for possible improvement of the currently used design and management procedures. Specific recommendations were made for improved material specifications to avoid stripping in the pavement structure as this was found to be the most important reason for the failure of pavements. A research plan has been proposed for future research. AN - dot:89357 ET - Final Report, May, 1984 to August, 1985 KW - Composite pavements KW - Evaluation KW - Flexible pavements KW - Nondestructive tests KW - Pavements KW - Rigid pavements KW - Rutting KW - Pavement stripping LA - English PB - Oklahoma. Department of Transportation PY - 1995-08-01 SN - FHWA/OK 85 (01) TI - Evaluation of Oklahoma Pavement Design Procedures M3 - Tech Report N1 - United States N1 - 84-02-4 UR - https://rosap.ntl.bts.gov/view/dot/89357 ER -
Experimental Products and Equipment for Highway Construction and Maintenance [1986]

Smith, Mitchell D.

1986-01-01 | PDF

This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the ...

03/09/2026

Title : Experimental Products and Equipment for Highway Construction and Maintenance [1986] Creator(s) : Smith, Mitchell D. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1986-01-01 Report Number : FHWA/OK 86(02) URL : https://rosap.ntl.bts.gov/view/dot/89356 Smith, Mitchell D. (1986). Experimental Products and Equipment for Highway Construction and Maintenance [1986]. Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance [1986]" (1986) Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance [1986]" , 1986 Export RIS Citation Information. TY - Tech Report AU - Smith, Mitchell D. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the progress or result of the evaluation. AN - dot:89356 ET - Annual Report, January, 1986 to January, 1987 KW - Adhesives KW - Admixtures KW - Annual reports KW - Bituminous materials KW - Construction equipment KW - Culverts KW - Deicing chemicals KW - Equipment KW - Fabrics KW - Herbicides KW - Highway maintenance KW - Joint fillers KW - Joint sealers KW - Testing equipment LA - English PB - Oklahoma. Department of Transportation PY - 1986-01-01 SN - FHWA/OK 86(02) TI - Experimental Products and Equipment for Highway Construction and Maintenance [1986] M3 - Tech Report N1 - United States N1 - 73-06-1 UR - https://rosap.ntl.bts.gov/view/dot/89356 ER -
MPO Board Member Training on Congestion Reduction [Policy Brief]

Kramer, Jeff ;

Dinehart, Taylor

2023-12-01 | PDF

The goal of this project is to change that paradigm by developing a training program that educates MPO board members on the potential for enacting system-wide and corridor-level congestion management and reduction strategies through the federally required metropolitan transportation planning process. More specific goals of this project include aidi ...

03/09/2026

Title : MPO Board Member Training on Congestion Reduction [Policy Brief] Creator(s) : Kramer, Jeff;Dinehart, Taylor;Boyd, Tia; Corporate Creator(s) : University of South Florida. Center for Urban Transportation Research. National Center for Urban Transportation Research Corporate Contributor(s) : University of South Florida. National Institute for Congestion Reduction;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2023-12-01 DOI : https://doi.org/10.5038/CUTR-NICR-Y2-E2 Kramer, Jeff et al. (2023). MPO Board Member Training on Congestion Reduction [Policy Brief]. https://doi.org/10.5038/CUTR-NICR-Y2-E2 Kramer, Jeff and Dinehart, Taylor and Boyd, Tia "MPO Board Member Training on Congestion Reduction [Policy Brief]" (2023), https://doi.org/10.5038/CUTR-NICR-Y2-E2 Kramer, Jeff et al. "MPO Board Member Training on Congestion Reduction [Policy Brief]" , 2023, https://doi.org/10.5038/CUTR-NICR-Y2-E2 Export RIS Citation Information. TY - Brief AU - Kramer, Jeff AU - Dinehart, Taylor AU - Boyd, Tia A2 - University of South Florida. Center for Urban Transportation Research. National Center for Urban Transportation Research A3 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The goal of this project is to change that paradigm by developing a training program that educates MPO board members on the potential for enacting system-wide and corridor-level congestion management and reduction strategies through the federally required metropolitan transportation planning process. More specific goals of this project include aiding MPO board members in recognizing:•The responsibilities of their MPO under federal regulations.• Their role in the MPO decision-making process as members of the MPO governing board and as transportation decision-makers outside of the MPO process.• The definition of “congestion” as it relates to transportation networks, the root causes of congestion, and the pros and cons associated with congestion.• Approaches to managing and reducing congestion at a system-wide and corridor level.• How to apply what they learn about MPOs and their role as MPO board members to address system-wide and corridor level congestion through the MPO decision-making process. AN - dot:89355 DO - https://doi.org/10.5038/CUTR-NICR-Y2-E2 ET - Policy Brief KW - Metropolitan areas KW - Metropolitan planning organizations KW - Traffic congestion KW - Transportation planning KW - Training KW - Communities KW - Regulations LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2023-12-01 TI - MPO Board Member Training on Congestion Reduction [Policy Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89355 ER -
MPO Board Member Training on Congestion Reduction

Kramer, Jeff ;

Dinehart, Taylor

2023-12-01 | PDF

Metropolitan Planning Organization (MPO) board members are responsible for establishing a long-range transportation vision for their metropolitan area and for making a variety of other significant transportation planning and programming decisions. These decisions have noteworthy and long-lasting impacts on the character of their communities, includ ...

03/09/2026

Title : MPO Board Member Training on Congestion Reduction Creator(s) : Kramer, Jeff;Dinehart, Taylor;Boyd, Tia; Corporate Creator(s) : University of South Florida. Center for Urban Transportation Research Corporate Contributor(s) : University of South Florida. National Institute for Congestion Reduction;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;United States. Department of Transportation. University Transportation Centers (UTC) Program; Published Date : 2023-12-01 DOI : https://doi.org/10.5038/CUTR-NICR-Y2-E2 Kramer, Jeff et al. (2023). MPO Board Member Training on Congestion Reduction. https://doi.org/10.5038/CUTR-NICR-Y2-E2 Kramer, Jeff and Dinehart, Taylor and Boyd, Tia "MPO Board Member Training on Congestion Reduction" (2023), https://doi.org/10.5038/CUTR-NICR-Y2-E2 Kramer, Jeff et al. "MPO Board Member Training on Congestion Reduction" , 2023, https://doi.org/10.5038/CUTR-NICR-Y2-E2 Export RIS Citation Information. TY - Tech Report AU - Kramer, Jeff AU - Dinehart, Taylor AU - Boyd, Tia A2 - University of South Florida. Center for Urban Transportation Research A3 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program AB - Metropolitan Planning Organization (MPO) board members are responsible for establishing a long-range transportation vision for their metropolitan area and for making a variety of other significant transportation planning and programming decisions. These decisions have noteworthy and long-lasting impacts on the character of their communities, including the impact on system-wide and corridor-level congestion. Yet, the vast majority of MPO board members come to their position without any background in transportation system development and even less on the nature of congestion. This training program, created under the guidance of the Association of Metropolitan Planning Organizations (AMPO), the National Association of Regional Councils (NARC), and the Florida MPO Advisory Council (MPOAC), educates MPO board members on their role in managing and reducing congestion in their metropolitan area. The modular podcast-style video training program covers a number of topics including the definition of transportation congestion, the root causes of congestion, the advantages and disadvantages of congestion, and the techniques for managing and reducing congestion where appropriate. It also includes a description of the basic process and product requirements for MPOs and the role played by MPO board members. Upon completion of the training, MPO board members will better understand their role in defining the future of congestion on their regional transportation system, resulting in a more robust planning and programming approach to congestion reduction nationwide. AN - dot:89354 DO - https://doi.org/10.5038/CUTR-NICR-Y2-E2 ET - Final Report January 2022 – December 2023 KW - Metropolitan planning organizations KW - Traffic congestion KW - Transportation planning KW - Training KW - Metropolitan areas KW - Communities KW - Regulations KW - congestion management strategies KW - MPO board members LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2023-12-01 TI - MPO Board Member Training on Congestion Reduction M3 - Tech Report N1 - United States N1 - 69A3551947136, #79075-20 UR - https://rosap.ntl.bts.gov/view/dot/89354 ER -
Evaluation of Dynamic Compaction in Tulsa, Oklahoma

Snethen, Donald R. ;

Homan, Michael H

1986-01-01 | PDF

This report describes the installation and monitoring of three test sections to evaluate dynamic compaction as it was applied as a foundation treatment for the approach fills of an interchange on the Gilcrease Expressway (SH 11) in north central Tulsa. The test sections were monitored to assess the performance of dynamic compaction and to provide t ...

03/09/2026

Title : Evaluation of Dynamic Compaction in Tulsa, Oklahoma Creator(s) : Snethen, Donald R.;Homan, Michael H; Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1986-01-01 Report Number : FHWA/OK 86(3) URL : https://rosap.ntl.bts.gov/view/dot/89353 Snethen, Donald R. and Homan, Michael H (1986). Evaluation of Dynamic Compaction in Tulsa, Oklahoma. Snethen, Donald R. and Homan, Michael H "Evaluation of Dynamic Compaction in Tulsa, Oklahoma" (1986) Snethen, Donald R. and Homan, Michael H "Evaluation of Dynamic Compaction in Tulsa, Oklahoma" , 1986 Export RIS Citation Information. TY - Tech Report AU - Snethen, Donald R. AU - Homan, Michael H A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This report describes the installation and monitoring of three test sections to evaluate dynamic compaction as it was applied as a foundation treatment for the approach fills of an interchange on the Gilcrease Expressway (SH 11) in north central Tulsa. The test sections were monitored to assess the performance of dynamic compaction and to provide the data base for recommending changes to the construction process as foundation conditions varied. AN - dot:89353 ET - Final Report KW - Soil mechanics KW - Foundation soils KW - Soil stabilization KW - Soil compaction KW - Tamping KW - Deep compaction KW - Dynamic compaction KW - Dynamic consolidation LA - English PB - Oklahoma. Department of Transportation PY - 1986-01-01 SN - FHWA/OK 86(3) TI - Evaluation of Dynamic Compaction in Tulsa, Oklahoma M3 - Tech Report N1 - United States N1 - 84-15-3, Item 2141 UR - https://rosap.ntl.bts.gov/view/dot/89353 ER -
Performance of Plastic Striping Tape

Borg, Tim M.

1986-04-01 | PDF

Standard thermoplastic traffic marking stripe was compared with 3M "STAMARK" Brand 5730 plastic marking tape. Both products were placed on two new PCC pavement projects and evaluated over two years. The "STAMARK" was found to be more expensive, easier to place, just as durable, but less reflective at night than standard thermoplastic stripe.

03/09/2026

Title : Performance of Plastic Striping Tape Creator(s) : Borg, Tim M. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1986-04-01 Report Number : FHWA/OK 86(3), 73-06-1 URL : https://rosap.ntl.bts.gov/view/dot/89352 Borg, Tim M. (1986). Performance of Plastic Striping Tape. Borg, Tim M. "Performance of Plastic Striping Tape" (1986) Borg, Tim M. "Performance of Plastic Striping Tape" , 1986 Export RIS Citation Information. TY - Tech Report AU - Borg, Tim M. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Standard thermoplastic traffic marking stripe was compared with 3M "STAMARK" Brand 5730 plastic marking tape. Both products were placed on two new PCC pavement projects and evaluated over two years. The "STAMARK" was found to be more expensive, easier to place, just as durable, but less reflective at night than standard thermoplastic stripe. AN - dot:89352 ET - Final Report, Nov. 1983-Feb. J.986 KW - Alternatives analysis KW - Costs KW - Durability KW - Plastics KW - Reflectivity KW - Road marking tapes KW - Thermoplastic materials LA - English PB - Oklahoma. Department of Transportation PY - 1986-04-01 SN - FHWA/OK 86(3), 73-06-1 TI - Performance of Plastic Striping Tape M3 - Tech Report N1 - United States N1 - 10(9), Part II UR - https://rosap.ntl.bts.gov/view/dot/89352 ER -
Silane Chemical Protection of Bridge Decks

Smith, Mitchell D.

1986-12-01 | PDF

This report describes the performance of alkyltrialkoxysilane chemical products and their ability to protect bridge structures from moisture, chloride ingression, and corrosion of reinforcing steel. As a result of the evaluation, the following recommendations are made: (1) The application of silane should be used to protect bridge structures from m ...

03/09/2026

Title : Silane Chemical Protection of Bridge Decks Creator(s) : Smith, Mitchell D. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1986-12-01 Report Number : FHWA/OK 86(4) URL : https://rosap.ntl.bts.gov/view/dot/89351 Smith, Mitchell D. (1986). Silane Chemical Protection of Bridge Decks. Smith, Mitchell D. "Silane Chemical Protection of Bridge Decks" (1986) Smith, Mitchell D. "Silane Chemical Protection of Bridge Decks" , 1986 Export RIS Citation Information. TY - Tech Report AU - Smith, Mitchell D. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This report describes the performance of alkyltrialkoxysilane chemical products and their ability to protect bridge structures from moisture, chloride ingression, and corrosion of reinforcing steel. As a result of the evaluation, the following recommendations are made: (1) The application of silane should be used to protect bridge structures from moisture and chloride ingression, and corrosion of reinforcing steel. (2) The silane treatment should be used on both new and existing bridge structures in which the chloride content at the rebar depth has not exceeded 2.5 lb/cu yd, or the corrosion potentials over the bridge deck area numerically do not exceed -350 millivolts. (3) A dry concrete surface is essential for successful application. An application rate of 125 sq ft/gal for horizontal surfaces and 175 sq ft/gal for vertical surfaces is recommended. After application, and the silane has penetrated, water should be applied to assure sufficient moisture for chemical reaction between the silane and concrete. (4) The Oklahoma Department of Transportation field testing of the bridge decks selected for the silane performance evaluation should be continued through 1996 to determine the long term performance. AN - dot:89351 ET - Final Report, 1976 to 1986 KW - Bridge decks KW - Corrosion protection KW - Field tests KW - Moisture barriers KW - Performance KW - Reinforcing steel KW - Silane LA - English PB - Oklahoma. Department of Transportation PY - 1986-12-01 SN - FHWA/OK 86(4) TI - Silane Chemical Protection of Bridge Decks M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89351 ER -
Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 22, Data Complete Through 2/27/2026

United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information

2026-03-04 | Special Issue - Weekly Motor Fuel Report | PDF

The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration ...

03/09/2026

Title : Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 22, Data Complete Through 2/27/2026 Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Published Date : 2026-03-04 Series : Special Issue - Weekly Motor Fuel Report URL : https://rosap.ntl.bts.gov/view/dot/89350 United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2026). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 22, Data Complete Through 2/27/2026. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 22, Data Complete Through 2/27/2026" (2026) United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 22, Data Complete Through 2/27/2026" , 2026 Export RIS Citation Information. TY - Statistical Report A2 - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information AB - The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration (EIA) website. The EIA publishes the average daily amount of gasoline supplied in barrels, which HPPI converts to an average number of gallons of gasoline per week. AN - dot:89350 KW - Fuel consumption KW - Gasoline KW - Supply KW - Traffic volume KW - Data collection KW - Data analysis LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information PY - 2026-03-04 T2 - Special Issue - Weekly Motor Fuel Report TI - Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 22, Data Complete Through 2/27/2026 M3 - Statistical Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89350 ER -
The Feasibility of Using Fly Ash as a Binder in Coarse and Fine Aggregates for Base Courses

Laguros, Joakim G. ;

Zenieris, Petros

1987-06-01 | PDF

Aggregate-fly ash mixes consisting of fine aggregate bases (FAB), coarse aggregate bases (CAB) and Class C fly ash additions of 15, 25 and 35% were tested in compressive and flexural strength for curing periods of up to six months. X-ray diffraction (XRD) was employed to study the mineralogical composition of the mixes and identify the fly ash hydr ...

03/09/2026

Title : The Feasibility of Using Fly Ash as a Binder in Coarse and Fine Aggregates for Base Courses Creator(s) : Laguros, Joakim G.;Zenieris, Petros; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1987-06-01 Report Number : FHWA/OK 86(8) URL : https://rosap.ntl.bts.gov/view/dot/89349 Laguros, Joakim G. and Zenieris, Petros (1987). The Feasibility of Using Fly Ash as a Binder in Coarse and Fine Aggregates for Base Courses. Laguros, Joakim G. and Zenieris, Petros "The Feasibility of Using Fly Ash as a Binder in Coarse and Fine Aggregates for Base Courses" (1987) Laguros, Joakim G. and Zenieris, Petros "The Feasibility of Using Fly Ash as a Binder in Coarse and Fine Aggregates for Base Courses" , 1987 Export RIS Citation Information. TY - Tech Report AU - Laguros, Joakim G. AU - Zenieris, Petros A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Aggregate-fly ash mixes consisting of fine aggregate bases (FAB), coarse aggregate bases (CAB) and Class C fly ash additions of 15, 25 and 35% were tested in compressive and flexural strength for curing periods of up to six months. X-ray diffraction (XRD) was employed to study the mineralogical composition of the mixes and identify the fly ash hydration products. Scanning electron microscopy (SEM) was used to verify the XRD findings and study the microstructural developments in the mixes. The compressive strength of the mixes varied considerably during the first week of curing but exhibited better uniformity in later ages. The variation was attributed to the massive formation of ettringite. Later, when ettringite was transformed to monosulfoaluminate and the CAH, CASH and CSH hydration phases formed, the strength of the mixes gained uniformity and magnitude. After a month's curing, the mixes presented little resistance to flexural failure but in 90 days the flexural strength level was substantial. The mixes were characterized as stiff but structurally flexible and a flexural design approach was devised. SEM observations indicated packing and densification of the mix matrix with time, as the hydration products form skeletal matrices in the mixes, resulting in better strength. The study establishes the dual role of the fly ash as a filler and a chemical agent (binder). AN - dot:89349 KW - Binders KW - Coarse aggregates KW - Compression tests KW - Concrete curing KW - Diffraction KW - Electron microscopy KW - Ettringite KW - Feasibility analysis KW - Fine aggregates KW - Flexural strength KW - Fly ash LA - English PB - Oklahoma. Department of Transportation PY - 1987-06-01 SN - FHWA/OK 86(8) TI - The Feasibility of Using Fly Ash as a Binder in Coarse and Fine Aggregates for Base Courses M3 - Tech Report N1 - United States N1 - ODOT 83-03-2 UR - https://rosap.ntl.bts.gov/view/dot/89349 ER -
Material Request Form Response [Form]

United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology

2000-01-01 | PDF

This is the standard form attached to material requests from the Federal Highway Administration Office of Research, Development, and Technology.

03/09/2026

Title : Material Request Form Response [Form] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2000-01-01 Report Number : FHWA-RD-00-163 URL : https://rosap.ntl.bts.gov/view/dot/89348 United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology (2000). Material Request Form Response [Form]. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology "Material Request Form Response [Form]" (2000) United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology "Material Request Form Response [Form]" , 2000 Export RIS Citation Information. TY - Other A2 - United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - This is the standard form attached to material requests from the Federal Highway Administration Office of Research, Development, and Technology. AN - dot:89348 KW - Forms KW - Documents LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology PY - 2000-01-01 SN - FHWA-RD-00-163 TI - Material Request Form Response [Form] M3 - Other N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89348 ER -
ARENS Photometric and Visibility Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The Photometric and Visibility Laboratory (PVL) enables researchers to evaluate the photometric and colorimetric properties of signing and marking materials, including fluorescent and retroreflective materials. Studies of human-centered systems related to visibility issues are also performed in this laboratory.

03/09/2026

Title : ARENS Photometric and Visibility Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-110 URL : https://rosap.ntl.bts.gov/view/dot/89347 United States. Department of Transportation. Federal Highway Administration (2001). ARENS Photometric and Visibility Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "ARENS Photometric and Visibility Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "ARENS Photometric and Visibility Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Photometric and Visibility Laboratory (PVL) enables researchers to evaluate the photometric and colorimetric properties of signing and marking materials, including fluorescent and retroreflective materials. Studies of human-centered systems related to visibility issues are also performed in this laboratory. AN - dot:89347 KW - Laboratory tests KW - Laboratories KW - Road marking materials KW - Traffic signs KW - Visibility LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-110 TI - ARENS Photometric and Visibility Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89347 ER -
Structures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The primary mission of the Structures Laboratory is to conduct experimental studies to determine the behavior of bridge components and full-size bridges. Data from these studies are used to improve the national bridge design specifications and to improve the safety, reliability, and cost-effectiveness of bridge construction in the United States. Th ...

03/09/2026

Title : Structures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-109 URL : https://rosap.ntl.bts.gov/view/dot/89346 United States. Department of Transportation. Federal Highway Administration (2001). Structures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Structures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Structures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The primary mission of the Structures Laboratory is to conduct experimental studies to determine the behavior of bridge components and full-size bridges. Data from these studies are used to improve the national bridge design specifications and to improve the safety, reliability, and cost-effectiveness of bridge construction in the United States. The development and evaluation of advanced high-performance materials and systems - e.g., high-performance steels, high-performance concrete, fiber-reinforced polymer composites, and adhesives - is a major focus of the current research program. The laboratory also investigates structural failures that occur in service to determine the cause of failure and to develop practices and procedures to prevent similar failures anywhere in the Nation. AN - dot:89346 KW - Laboratory tests KW - Laboratories KW - Structures LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-109 TI - Structures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89346 ER -
Aerodynamics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The Aerodynamics Laboratory is used to study the complex interactions between wind and bridges or other highway structures.

03/09/2026

Title : Aerodynamics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-111 URL : https://rosap.ntl.bts.gov/view/dot/89345 United States. Department of Transportation. Federal Highway Administration (2001). Aerodynamics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Aerodynamics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Aerodynamics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Aerodynamics Laboratory is used to study the complex interactions between wind and bridges or other highway structures. AN - dot:89345 KW - Laboratory tests KW - Laboratories KW - Aerodynamics KW - Highway bridges LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-111 TI - Aerodynamics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89345 ER -
Highway Safety Information System Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The Highway Safety Information System (HSIS) Laboratory offers value to FHWA's Research and Development program, to other offices within FHWA and DOT, to the safety research community in general, arid to State and local engineers/planners. The purpose of the lab is to operate and maintain HSIS, to conduct research to support FHWA's focus areas, and ...

03/09/2026

Title : Highway Safety Information System Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-108 URL : https://rosap.ntl.bts.gov/view/dot/89344 United States. Department of Transportation. Federal Highway Administration (2001). Highway Safety Information System Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Highway Safety Information System Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Highway Safety Information System Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Highway Safety Information System (HSIS) Laboratory offers value to FHWA's Research and Development program, to other offices within FHWA and DOT, to the safety research community in general, arid to State and local engineers/planners. The purpose of the lab is to operate and maintain HSIS, to conduct research to support FHWA's focus areas, and to provide data to a wide variety of highway safety researchers. The HSIS lab also supports the development and use of data collection and analytical tools for the study of highway safety. Computerized photologs are used to visually verify existing data and collect supplemental data through traditional methods and advanced techniques, such as image recognition algorithms, and GIS-based tools applied to display and analyze safety data. AN - dot:89344 KW - Laboratory tests KW - Laboratories KW - Highway safety KW - Information systems LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-108 TI - Highway Safety Information System Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89344 ER -
Saxton Highway Electronics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The Saxton Highway Electronics Laboratory (SHEL) started as a small electrical repair shop. Today, it is a modern design and fabrication facility, consisting of a large three-bay vehicle preparation laboratory, model shop, test and storage area, and the main electronics laboratory. The mission of the Highway Electronics Laboratory is to provide ele ...

03/09/2026

Title : Saxton Highway Electronics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-104 URL : https://rosap.ntl.bts.gov/view/dot/89343 United States. Department of Transportation. Federal Highway Administration (2001). Saxton Highway Electronics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Saxton Highway Electronics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Saxton Highway Electronics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Saxton Highway Electronics Laboratory (SHEL) started as a small electrical repair shop. Today, it is a modern design and fabrication facility, consisting of a large three-bay vehicle preparation laboratory, model shop, test and storage area, and the main electronics laboratory. The mission of the Highway Electronics Laboratory is to provide electronic engineering support services to the offices of Research, Development and Technology (RD&T) and other offices of the Federal Highway Administration (FHWA). SHEL provides electronic design engineering and electronic technician support, including design, fabrication, wiring, repair, and other associated electronic services, to all of RD&T's research labs. AN - dot:89343 KW - Laboratory tests KW - Laboratories KW - Electronics KW - Fabrication LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-104 TI - Saxton Highway Electronics Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89343 ER -
FHWA Office of Research, Development, and Technology (RD&T), Turner-Fairbank Highway Research Center (TFHRC) - Our Vision for the Future, Management Philosophy, and Top Challenges & Commitments [2001]

United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology

2001-08-01 | PDF

To guide our Business and Performance Plan, the RD&T Leadership Council has a vision to conductresearch and provide products and services that are essential, indispensable, and connected to our customers and partners. We are committed to continuing our quality journey; to initiating improvements in programs, processes, and the quality of work life; ...

03/09/2026

Title : FHWA Office of Research, Development, and Technology (RD&T), Turner-Fairbank Highway Research Center (TFHRC) - Our Vision for the Future, Management Philosophy, and Top Challenges & Commitments [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-08-01 Report Number : FHWA-RD-01-125 URL : https://rosap.ntl.bts.gov/view/dot/89342 United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology (2001). FHWA Office of Research, Development, and Technology (RD&T), Turner-Fairbank Highway Research Center (TFHRC) - Our Vision for the Future, Management Philosophy, and Top Challenges & Commitments [2001]. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology "FHWA Office of Research, Development, and Technology (RD&T), Turner-Fairbank Highway Research Center (TFHRC) - Our Vision for the Future, Management Philosophy, and Top Challenges & Commitments [2001]" (2001) United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology "FHWA Office of Research, Development, and Technology (RD&T), Turner-Fairbank Highway Research Center (TFHRC) - Our Vision for the Future, Management Philosophy, and Top Challenges & Commitments [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - To guide our Business and Performance Plan, the RD&T Leadership Council has a vision to conduct AB - research and provide products and services that are essential, indispensable, and connected to our customers and partners. We are committed to continuing our quality journey; to initiating improvements in programs, processes, and the quality of work life; to conducting outstanding research; and to providing services that "drive" the achievement of FHWA strategic goals and performance indicators. AN - dot:89342 KW - Laboratory tests KW - Laboratories KW - Strategic planning LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology PY - 2001-08-01 SN - FHWA-RD-01-125 TI - FHWA Office of Research, Development, and Technology (RD&T), Turner-Fairbank Highway Research Center (TFHRC) - Our Vision for the Future, Management Philosophy, and Top Challenges & Commitments [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89342 ER -
Comparing Pricing Mechanisms for Managed Lanes: Performance Assessment of PR-22 Dynamic Toll Lanes

Figueroa-Medina, Alberto M

;

Colucci-Ríos, Benjamín

2021-09-01 | PDF

A performance assessment and willingness-to-pay (WTP) analysis were conducted of the reversible dynamic toll lanes (DTL) of freeway PR-22 in Puerto Rico. This is the first managed lane facility of its kind in a toll freeway in Puerto Rico. Toll transactions from the year 2019 were used to calculate seven performance measures to assess the impact of ...

03/09/2026

Title : Comparing Pricing Mechanisms for Managed Lanes: Performance Assessment of PR-22 Dynamic Toll Lanes Creator(s) : Figueroa-Medina, Alberto M;Colucci-Ríos, Benjamín;Rodríguez-Román, Daniel;Valle-González, Carlos del;Nieves-Díaz, Luis J.;O’Neill-Medina, Gilmarie;Cortez-Cuervo, Isaac; Corporate Creator(s) : University of Puerto Rico (Mayaguez Campus). Dept. of Civil Engineering & Surveying Corporate Contributor(s) : University of South Florida. National Institute for Congestion Reduction;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2021-09-01 DOI : https://doi.org/10.5038/CUTR-NICR-Y1-4-1.1 Figueroa-Medina, Alberto M et al. (2021). Comparing Pricing Mechanisms for Managed Lanes: Performance Assessment of PR-22 Dynamic Toll Lanes. https://doi.org/10.5038/CUTR-NICR-Y1-4-1.1 Figueroa-Medina, Alberto M et al. "Comparing Pricing Mechanisms for Managed Lanes: Performance Assessment of PR-22 Dynamic Toll Lanes" (2021), https://doi.org/10.5038/CUTR-NICR-Y1-4-1.1 Figueroa-Medina, Alberto M et al. "Comparing Pricing Mechanisms for Managed Lanes: Performance Assessment of PR-22 Dynamic Toll Lanes" , 2021, https://doi.org/10.5038/CUTR-NICR-Y1-4-1.1 Export RIS Citation Information. TY - Tech Report AU - Figueroa-Medina, Alberto M AU - Colucci-Ríos, Benjamín AU - Rodríguez-Román, Daniel AU - Valle-González, Carlos del AU - Nieves-Díaz, Luis J. AU - O’Neill-Medina, Gilmarie AU - Cortez-Cuervo, Isaac A2 - University of Puerto Rico (Mayaguez Campus). Dept. of Civil Engineering & Surveying A3 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - A performance assessment and willingness-to-pay (WTP) analysis were conducted of the reversible dynamic toll lanes (DTL) of freeway PR-22 in Puerto Rico. This is the first managed lane facility of its kind in a toll freeway in Puerto Rico. Toll transactions from the year 2019 were used to calculate seven performance measures to assess the impact of the managed lanes on travel times and vehicle speeds on the 12 km-long (7.7 mi) segment. The results demonstrate that the dynamic pricing algorithm behaves as expected, increasing the price for the DTL as traffic increases and vehicle speeds decrease on the facility, and provided satisfactory performance for the conditions at PR-22. The DTL provided an average travel time savings of 7 minutes and enhanced travel time reliability when compared with the general toll lanes (GTL) during the morning peak period. Compared to six other managed lane facilities in the U.S., the results from the PR-22 DTL show higher travel time savings and reliability. A survey of PR-22 users was conducted to estimate their willingness-to-pay (WTP) and their attitudes and perceptions associated with the quality and usage of the DTL. The aggregate analysis of PR-22 users using the Van Westerndorp Price Sensitivity Meter resulted in a WTP range for the DTL of $1.00 to $2.79, which is less than the $4.95 maximum toll charged for the managed lane facility. Even though the maximum price exceeds their WTP, the level of congestion in the GTL during peak periods still motivates users to pay the extra fee for the DTL outside of their preference. A regression analysis found that the factors that significantly reduce the WTP of the freeway users include subjects from higher income levels, higher ages, and females. As stated by freeway users, the congestion in the GTL is the main factor that influence them to use the DTL. Therefore, a recommendation to increase the usage of the PR-22 DTL is to provide commuters with relevant information about the real-time benefits of the DTL. The implementation of a high-occupancy vehicle (HOV) policy for the freeway corridor should also be studied. A HOV policy could promote ridesharing on the corridor while providing economic relief and enhancing the equity of the toll freeway by reducing or eliminating the premium toll fee of the managed lanes to those commuters. AN - dot:89341 DO - https://doi.org/10.5038/CUTR-NICR-Y1-4-1.1 ET - Final Research Report (January 2020 – September 2021) KW - Congestion management systems KW - Road pricing KW - Managed lanes KW - Performance measurement KW - Pricing KW - High occupancy toll lanes LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2021-09-01 TI - Comparing Pricing Mechanisms for Managed Lanes: Performance Assessment of PR-22 Dynamic Toll Lanes M3 - Tech Report N1 - United States N1 - 69A3551947136 UR - https://rosap.ntl.bts.gov/view/dot/89341 ER -
FHWA Nondestructive Evaluation (NDE) Validation Center [2000]

United States. Department of Transportation. Federal Highway Administration

2000-01-01 | PDF

Nondestructive Evaluation (NDE) technologies that determine the condition of the infrastructure can improve our ability to make important maintenance and safety decisions, and will play a critical role in the future success of the highway system. The FHWA NDE Validation Center (NDEVC) is designed to evaluate the effectiveness of NOE technologies an ...

03/09/2026

Title : FHWA Nondestructive Evaluation (NDE) Validation Center [2000] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Washer, Glenn Published Date : 2000-01-01 Report Number : FHWA-RD-00-041 URL : https://rosap.ntl.bts.gov/view/dot/89340 United States. Department of Transportation. Federal Highway Administration (2000). FHWA Nondestructive Evaluation (NDE) Validation Center [2000]. United States. Department of Transportation. Federal Highway Administration "FHWA Nondestructive Evaluation (NDE) Validation Center [2000]" (2000) United States. Department of Transportation. Federal Highway Administration "FHWA Nondestructive Evaluation (NDE) Validation Center [2000]" , 2000 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Washer, Glenn AB - Nondestructive Evaluation (NDE) technologies that determine the condition of the infrastructure can improve our ability to make important maintenance and safety decisions, and will play a critical role in the future success of the highway system. The FHWA NDE Validation Center (NDEVC) is designed to evaluate the effectiveness of NOE technologies and promote the use of NDE to improve our ability to determine the health and safety of the Nation's highways. AN - dot:89340 KW - Laboratory tests KW - Laboratories KW - Nondestructive tests KW - Highway bridges LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2000-01-01 SN - FHWA-RD-00-041 TI - FHWA Nondestructive Evaluation (NDE) Validation Center [2000] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89340 ER -
FHWA/NHTSA National Crash Analysis Center - Research that is Essential, Indispensable, and Connected to our Customers [2003]

United States. Department of Transportation. Federal Highway Administration

2003-01-01 | PDF

When safety experts worldwide need to review crash data, look at computer models of vehicles, or analyze roadside hardware designs, they rely on the researchers and the resources available at the National Crash Analysis Center (NCAC). As a unique storehouse of safety information and safety expertise throughout the world, NCAC supports the Federal H ...

03/09/2026

Title : FHWA/NHTSA National Crash Analysis Center - Research that is Essential, Indispensable, and Connected to our Customers [2003] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Meczkowski, Leonard Published Date : 2003-01-01 Report Number : FHWA-RD-03-058 URL : https://rosap.ntl.bts.gov/view/dot/89339 United States. Department of Transportation. Federal Highway Administration (2003). FHWA/NHTSA National Crash Analysis Center - Research that is Essential, Indispensable, and Connected to our Customers [2003]. United States. Department of Transportation. Federal Highway Administration "FHWA/NHTSA National Crash Analysis Center - Research that is Essential, Indispensable, and Connected to our Customers [2003]" (2003) United States. Department of Transportation. Federal Highway Administration "FHWA/NHTSA National Crash Analysis Center - Research that is Essential, Indispensable, and Connected to our Customers [2003]" , 2003 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Meczkowski, Leonard AB - When safety experts worldwide need to review crash data, look at computer models of vehicles, or analyze roadside hardware designs, they rely on the researchers and the resources available at the National Crash Analysis Center (NCAC). As a unique storehouse of safety information and safety expertise throughout the world, NCAC supports the Federal Highway Administration's (FHWA) strategic objective to reduce fatalities and injuries by 20 percent in 10 years. NCAC's research goal is to curtail the safety problems of occupants in crashes. NCAC's resources help researchers understand and quantify a vehicle's performance and its components, occupants, and roadside hardware in crashes, and provide optimum design solutions to minimize crash impact severity. AN - dot:89339 KW - Laboratory tests KW - Laboratories KW - Traffic crashes KW - Crash data KW - Traffic safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2003-01-01 SN - FHWA-RD-03-058 TI - FHWA/NHTSA National Crash Analysis Center - Research that is Essential, Indispensable, and Connected to our Customers [2003] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89339 ER -
Bridge Management Information Systems Laboratory - Research that is Essential, Indispensable, and Connected to our Customers [2003]

United States. Department of Transportation. Federal Highway Administration

2003-01-01 | PDF

The Bridge Management Information Systems (BMIS) Laboratory identifies and analyzes the causes and trends of deficiencies in the Nation's bridge inventory and develops methods to enhance bridge management practices. Using the National Bridge Inventory (NBI), BMIS provides the Federal Highway Administration (FHWA) and its customers with applications ...

03/09/2026

Title : Bridge Management Information Systems Laboratory - Research that is Essential, Indispensable, and Connected to our Customers [2003] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Hooks, John M. Published Date : 2003-01-01 Report Number : FHWA-RD-03-075 URL : https://rosap.ntl.bts.gov/view/dot/89338 United States. Department of Transportation. Federal Highway Administration (2003). Bridge Management Information Systems Laboratory - Research that is Essential, Indispensable, and Connected to our Customers [2003]. United States. Department of Transportation. Federal Highway Administration "Bridge Management Information Systems Laboratory - Research that is Essential, Indispensable, and Connected to our Customers [2003]" (2003) United States. Department of Transportation. Federal Highway Administration "Bridge Management Information Systems Laboratory - Research that is Essential, Indispensable, and Connected to our Customers [2003]" , 2003 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Hooks, John M. AB - The Bridge Management Information Systems (BMIS) Laboratory identifies and analyzes the causes and trends of deficiencies in the Nation's bridge inventory and develops methods to enhance bridge management practices. Using the National Bridge Inventory (NBI), BMIS provides the Federal Highway Administration (FHWA) and its customers with applications that enhance and supplement the data collected and maintained in the NBI. AN - dot:89338 KW - Laboratory tests KW - Laboratories KW - Bridge management systems KW - Inventory LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2003-01-01 SN - FHWA-RD-03-075 TI - Bridge Management Information Systems Laboratory - Research that is Essential, Indispensable, and Connected to our Customers [2003] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89338 ER -
Human Centered Systems Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The Human Centered Systems (HCS) Laboratory aids the design of a safe and efficient roadway infrastructure through the analysis of driver and pedestrian behavior.

03/09/2026

Title : Human Centered Systems Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-138 URL : https://rosap.ntl.bts.gov/view/dot/89337 United States. Department of Transportation. Federal Highway Administration (2001). Human Centered Systems Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Human Centered Systems Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Human Centered Systems Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Human Centered Systems (HCS) Laboratory aids the design of a safe and efficient roadway infrastructure through the analysis of driver and pedestrian behavior. AN - dot:89337 KW - Laboratory tests KW - Laboratories KW - Human factors KW - Driving behavior LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-138 TI - Human Centered Systems Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89337 ER -
Corridor-Wide Surveillance Using Unmanned Aircraft Systems [Policy Brief]

Zhang, Yu

;

Kourtellis, Achilleas

2023-12-01 | PDF

The main objective was to provide the outcome in traffic engineering terms that can be used by the TMC, the team needed to translate the traffic congestion recorded into Level of Service (LOS), and traffic density, or occupancy. The team enhanced the algorithm developed in Phase I by following a specific framework and pieces of algorithm to perform ...

03/09/2026

Title : Corridor-Wide Surveillance Using Unmanned Aircraft Systems [Policy Brief] Creator(s) : Zhang, Yu;Kourtellis, Achilleas;Post, Joseph;Tang, Hualong;Yelchuri, Keerthana;Porter, Brian; Corporate Creator(s) : University of South Florida. National Institute for Congestion Reduction Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2023-12-01 URL : https://rosap.ntl.bts.gov/view/dot/89336 Zhang, Yu et al. (2023). Corridor-Wide Surveillance Using Unmanned Aircraft Systems [Policy Brief]. Zhang, Yu et al. "Corridor-Wide Surveillance Using Unmanned Aircraft Systems [Policy Brief]" (2023) Zhang, Yu et al. "Corridor-Wide Surveillance Using Unmanned Aircraft Systems [Policy Brief]" , 2023 Export RIS Citation Information. TY - Brief AU - Zhang, Yu AU - Kourtellis, Achilleas AU - Post, Joseph AU - Tang, Hualong AU - Yelchuri, Keerthana AU - Porter, Brian A2 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The main objective was to provide the outcome in traffic engineering terms that can be used by the TMC, the team needed to translate the traffic congestion recorded into Level of Service (LOS), and traffic density, or occupancy. The team enhanced the algorithm developed in Phase I by following a specific framework and pieces of algorithm to perform different tasks as described here:1)Training and testing of You Only Look Once (YOLO) model for object detection, which included training YOLO v4 on videos collected via the UAS in the Tampa Bay area. The model was trained on detecting vehicles of varied sizes using both the Red-Green-Blue (RGB) video and the infrared (thermal) video. The model was then tested on untrained video to establish accuracy and was tuned to detect moving vehicles in the videos.2)The algorithm was then expanded to extract traffic features from the video to establish parameters for traffic monitoring. Vehicle speed including median speed, max speed, and standard deviation of speed were calculated. Traffic density was then calculated based on the road segment available in the video. AN - dot:89336 ET - Policy Brief KW - Unmanned aircraft systems KW - Drones KW - Traffic KW - Transportation KW - Incident management KW - Applications KW - Experiments KW - Machine learning KW - Traffic data KW - Literature reviews KW - Traffic congestion KW - Cameras KW - Object detection KW - Design KW - Data collection KW - Infrared analysis LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2023-12-01 TI - Corridor-Wide Surveillance Using Unmanned Aircraft Systems [Policy Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89336 ER -
Geotechnical Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]

United States. Department of Transportation. Federal Highway Administration

2002-01-01 | PDF

The Geotechnical Laboratory studies the complex interactions between soil and those structural elements made of steel, concrete, and timber used for bridge foundations and retaining wall systems. New materials, new designs, and new methods of construction are tested and evaluated in both indoor and outdoor environments to determine their acceptabil ...

03/09/2026

Title : Geotechnical Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2002-01-01 Report Number : FHWA-RD-02-048 URL : https://rosap.ntl.bts.gov/view/dot/89335 United States. Department of Transportation. Federal Highway Administration (2002). Geotechnical Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]. United States. Department of Transportation. Federal Highway Administration "Geotechnical Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" (2002) United States. Department of Transportation. Federal Highway Administration "Geotechnical Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" , 2002 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Geotechnical Laboratory studies the complex interactions between soil and those structural elements made of steel, concrete, and timber used for bridge foundations and retaining wall systems. New materials, new designs, and new methods of construction are tested and evaluated in both indoor and outdoor environments to determine their acceptability and to identify opportunities for improvement. AN - dot:89335 KW - Laboratory tests KW - Laboratories KW - Geotechnical engineering KW - Soil mechanics LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2002-01-01 SN - FHWA-RD-02-048 TI - Geotechnical Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89335 ER -
Experimental Study of Two Prestressed Steel Beam Concrete Slab Bridge Units [1987]

Densford, Thomas A ;

Murray, Thomas M.,

1987-05-01 | PDF

The behavior of two 55 ft. long prestressed, composite steel beam concrete slab bridge units was studied. The type of unit tested is currently used in county road bridge construction, where the use of prefabricated units is especially economical.

03/09/2026

Title : Experimental Study of Two Prestressed Steel Beam Concrete Slab Bridge Units [1987] Creator(s) : Densford, Thomas A;Murray, Thomas M.,; Corporate Creator(s) : University of Oklahoma. College of Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1987-05-01 Report Number : FHWA/OK 87 (1) URL : https://rosap.ntl.bts.gov/view/dot/89334 Densford, Thomas A and Murray, Thomas M., (1987). Experimental Study of Two Prestressed Steel Beam Concrete Slab Bridge Units [1987]. Densford, Thomas A and Murray, Thomas M., "Experimental Study of Two Prestressed Steel Beam Concrete Slab Bridge Units [1987]" (1987) Densford, Thomas A and Murray, Thomas M., "Experimental Study of Two Prestressed Steel Beam Concrete Slab Bridge Units [1987]" , 1987 Export RIS Citation Information. TY - Tech Report AU - Densford, Thomas A AU - Murray, Thomas M., A2 - University of Oklahoma. College of Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The behavior of two 55 ft. long prestressed, composite steel beam concrete slab bridge units was studied. The type of unit tested is currently used in county road bridge construction, where the use of prefabricated units is especially economical. AN - dot:89334 ET - Final Report, Jan '85 -May '87 KW - Breaking loads KW - Bridge decks KW - Composite materials KW - Failure analysis KW - Forecasting KW - Loads KW - Mechanical fatigue KW - Prefabricated structures KW - Prestressing KW - Static loads KW - Stud connectors LA - English PB - Oklahoma. Department of Transportation PY - 1987-05-01 SN - FHWA/OK 87 (1) TI - Experimental Study of Two Prestressed Steel Beam Concrete Slab Bridge Units [1987] M3 - Tech Report N1 - United States N1 - 28, 82-02-2 UR - https://rosap.ntl.bts.gov/view/dot/89334 ER -
Corridor-Wide Surveillance Using Unmanned Aircraft Systems

Zhang, Yu

;

Kourtellis, Achilleas

2023-12-01 | PDF

In the second phase of the project, the research team continued traffic data collection with unmanned aerial systems (UAS) and dual sensors (RGB and thermal cameras) for roadways under normal operational condition and during incident clearance. The research team conducted a thorough literature review of incident detection methods. Based on the revi ...

03/09/2026

Title : Corridor-Wide Surveillance Using Unmanned Aircraft Systems Creator(s) : Zhang, Yu;Kourtellis, Achilleas;Post, Joseph;Tang, Hualong;Yelchuri, Keerthana;Porter, Brian; Corporate Creator(s) : University of South Florida. National Institute for Congestion Reduction Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2023-12-01 URL : https://rosap.ntl.bts.gov/view/dot/89333 Zhang, Yu et al. (2023). Corridor-Wide Surveillance Using Unmanned Aircraft Systems. Zhang, Yu et al. "Corridor-Wide Surveillance Using Unmanned Aircraft Systems" (2023) Zhang, Yu et al. "Corridor-Wide Surveillance Using Unmanned Aircraft Systems" , 2023 Export RIS Citation Information. TY - Tech Report AU - Zhang, Yu AU - Kourtellis, Achilleas AU - Post, Joseph AU - Tang, Hualong AU - Yelchuri, Keerthana AU - Porter, Brian A2 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - In the second phase of the project, the research team continued traffic data collection with unmanned aerial systems (UAS) and dual sensors (RGB and thermal cameras) for roadways under normal operational condition and during incident clearance. The research team conducted a thorough literature review of incident detection methods. Based on the review outcomes, the research team extracted traffic features from learning the video data and trained several learning models for identifying non-congestion conditions caused by incidents. This method was tested on a two-minute video with data captured by a drone at a location at which traffic was passing through an incident site. The results show that some machine learning models (support vector machine, K nearest neighbor, and random forest) performed very well in F1 scoring. AN - dot:89333 ET - Final Report [September 2021 – August 2022] KW - Unmanned aircraft systems KW - Drones KW - Traffic KW - Transportation KW - Incident management KW - Applications KW - Experiments KW - Machine learning KW - Traffic data KW - Literature reviews KW - Traffic congestion KW - Cameras KW - Object detection KW - Design KW - Data collection KW - object detection algorithm KW - experimental design LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2023-12-01 TI - Corridor-Wide Surveillance Using Unmanned Aircraft Systems M3 - Tech Report N1 - United States N1 - 69A3551947136, 79075-14, 79075-15 UR - https://rosap.ntl.bts.gov/view/dot/89333 ER -
Traffic Research Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The Traffic Research Laboratory (TReL) is a unique combination of advanced hardware and software systems that can be used by researchers and practicing traffic engineers to assess and evaluate the impact of various combinations of advanced technologies, strategies, and policies prior to field installation. State-of-the-art traffic research and deve ...

03/09/2026

Title : Traffic Research Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-112 URL : https://rosap.ntl.bts.gov/view/dot/89332 United States. Department of Transportation. Federal Highway Administration (2001). Traffic Research Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Traffic Research Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Traffic Research Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Traffic Research Laboratory (TReL) is a unique combination of advanced hardware and software systems that can be used by researchers and practicing traffic engineers to assess and evaluate the impact of various combinations of advanced technologies, strategies, and policies prior to field installation. State-of-the-art traffic research and development of these systems are conducted in the laboratory. The laboratory provides an experimental testbed and analysis toolbox to facilitate FHWA's Research and Development (R&D) program in Advanced Traffic Management Systems (ATMS). AN - dot:89332 KW - Laboratory tests KW - Laboratories KW - Traffic engineering KW - Visualization KW - Simulation KW - Communication LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-112 TI - Traffic Research Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89332 ER -
Paint and Corrosion Laboratory Fact Sheet: Research that Is Essential, Indispensable, and Connected to Our Customers [2001]

United States. Department of Transportation. Federal Highway Administration

2001-01-01 | PDF

The mission of the Paint and Corrosion Laboratory (PCL) is to provide technical support to the Office of Infrastructure Research and Development to develop and analyze the effectiveness of innovative coatings test procedures while evaluating the durability of new coating systems, especially environmentally compliant materials for the corrosion prot ...

03/09/2026

Title : Paint and Corrosion Laboratory Fact Sheet: Research that Is Essential, Indispensable, and Connected to Our Customers [2001] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2001-01-01 Report Number : FHWA-RD-01-139 URL : https://rosap.ntl.bts.gov/view/dot/89331 United States. Department of Transportation. Federal Highway Administration (2001). Paint and Corrosion Laboratory Fact Sheet: Research that Is Essential, Indispensable, and Connected to Our Customers [2001]. United States. Department of Transportation. Federal Highway Administration "Paint and Corrosion Laboratory Fact Sheet: Research that Is Essential, Indispensable, and Connected to Our Customers [2001]" (2001) United States. Department of Transportation. Federal Highway Administration "Paint and Corrosion Laboratory Fact Sheet: Research that Is Essential, Indispensable, and Connected to Our Customers [2001]" , 2001 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The mission of the Paint and Corrosion Laboratory (PCL) is to provide technical support to the Office of Infrastructure Research and Development to develop and analyze the effectiveness of innovative coatings test procedures while evaluating the durability of new coating systems, especially environmentally compliant materials for the corrosion protection of steel bridges. AN - dot:89331 KW - Laboratory tests KW - Laboratories KW - Paint KW - Corrosion KW - Corrosion protection KW - Coatings LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2001-01-01 SN - FHWA-RD-01-139 TI - Paint and Corrosion Laboratory Fact Sheet: Research that Is Essential, Indispensable, and Connected to Our Customers [2001] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89331 ER -
Nondestructive Evaluation Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]

United States. Department of Transportation. Federal Highway Administration

2002-01-01 | PDF

Researchers at the Federal Highway Administration's Nondestructive Evaluation (NDE) Laboratory, located at the Turner Fairbank Highway Research Center, develop and test NDE technologies to assess the condition of highway bridges. This assessment includes evaluating current technologies and developing new tools that will advance the practice of brid ...

03/09/2026

Title : Nondestructive Evaluation Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2002-01-01 Report Number : FHWA-RD-02-055 URL : https://rosap.ntl.bts.gov/view/dot/89330 United States. Department of Transportation. Federal Highway Administration (2002). Nondestructive Evaluation Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]. United States. Department of Transportation. Federal Highway Administration "Nondestructive Evaluation Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" (2002) United States. Department of Transportation. Federal Highway Administration "Nondestructive Evaluation Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" , 2002 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - Researchers at the Federal Highway Administration's Nondestructive Evaluation (NDE) Laboratory, located at the Turner Fairbank Highway Research Center, develop and test NDE technologies to assess the condition of highway bridges. This assessment includes evaluating current technologies and developing new tools that will advance the practice of bridge inspection. AN - dot:89330 KW - Laboratory tests KW - Laboratories KW - Nondestructive tests KW - Highway bridges LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2002-01-01 SN - FHWA-RD-02-055 TI - Nondestructive Evaluation Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89330 ER -
Office of Operations R&D [2002]

United States. Department of Transportation. Federal Highway Administration. Office of Operations

2002-02-01 | PDF

The Office of Operations R&D is making major contributions to assist FHWA in meeting its mobility, safety, and security goals through completed or planned products and activities with the following strategies: Implementing an Integrated Intelligent Transportation System (ITS)Infrastructure; Focusing on Weather, Security, and Lifesaving Technologies ...

03/09/2026

Title : Office of Operations R&D [2002] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Operations Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2002-02-01 Report Number : FHWA-RD-02-076 URL : https://rosap.ntl.bts.gov/view/dot/89329 United States. Department of Transportation. Federal Highway Administration. Office of Operations (2002). Office of Operations R&D [2002]. United States. Department of Transportation. Federal Highway Administration. Office of Operations "Office of Operations R&D [2002]" (2002) United States. Department of Transportation. Federal Highway Administration. Office of Operations "Office of Operations R&D [2002]" , 2002 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration. Office of Operations A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - The Office of Operations R&D is making major contributions to assist FHWA in meeting its mobility, safety, and security goals through completed or planned products and activities with the following strategies: Implementing an Integrated Intelligent Transportation System (ITS) AB - Infrastructure; Focusing on Weather, Security, and Lifesaving Technologies; and Developing and Implementing a Reliable Nationwide Differential GPS. AN - dot:89329 KW - Laboratory tests KW - Laboratories KW - Transportation operations KW - Intelligent transportation systems programs KW - Weather KW - Global Positioning System LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Operations PY - 2002-02-01 SN - FHWA-RD-02-076 TI - Office of Operations R&D [2002] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89329 ER -
Bituminous Mixtures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]

United States. Department of Transportation. Federal Highway Administration

2002-01-01 | PDF

The Bituminous Mixtures Laboratory (Mix Lab) develops and improves bituminous mixture design technology and performance-based tests, and evaluates aggregates, binders, additives, and new materials. The laboratory also provides the Federal Highway Administration (FHWA) and its customers with an unbiased evaluation of mixtures and test procedures.

03/09/2026

Title : Bituminous Mixtures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Stuart, Kevin Published Date : 2002-01-01 Report Number : FHWA-RD-02-080 URL : https://rosap.ntl.bts.gov/view/dot/89328 United States. Department of Transportation. Federal Highway Administration (2002). Bituminous Mixtures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]. United States. Department of Transportation. Federal Highway Administration "Bituminous Mixtures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" (2002) United States. Department of Transportation. Federal Highway Administration "Bituminous Mixtures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" , 2002 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Stuart, Kevin AB - The Bituminous Mixtures Laboratory (Mix Lab) develops and improves bituminous mixture design technology and performance-based tests, and evaluates aggregates, binders, additives, and new materials. The laboratory also provides the Federal Highway Administration (FHWA) and its customers with an unbiased evaluation of mixtures and test procedures. AN - dot:89328 KW - Laboratory tests KW - Laboratories KW - Bituminous mixtures KW - Aggregates KW - Bituminous binders KW - Additives LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2002-01-01 SN - FHWA-RD-02-080 TI - Bituminous Mixtures Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89328 ER -
Simulation, Imaging, and Mechanics of Asphalt Pavements (SIMAP) Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]

United States. Department of Transportation. Federal Highway Administration

2002-01-01 | PDF

The SIMAP Laboratory provides FHWA and its customers with applications of diverse cutting-edge technologies that provide a complete description and understanding of pavement performance, including design and construction, and properties of asphalt pavements with long service lives. This highway research lab actively focuses on analysis of asphalt s ...

03/09/2026

Title : Simulation, Imaging, and Mechanics of Asphalt Pavements (SIMAP) Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Petros, Katherine;Azari, Haleh;Masad, Eyad;Wang, Linbing; Published Date : 2002-01-01 Report Number : FHWA-RD-02-093 URL : https://rosap.ntl.bts.gov/view/dot/89327 United States. Department of Transportation. Federal Highway Administration (2002). Simulation, Imaging, and Mechanics of Asphalt Pavements (SIMAP) Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]. United States. Department of Transportation. Federal Highway Administration "Simulation, Imaging, and Mechanics of Asphalt Pavements (SIMAP) Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" (2002) United States. Department of Transportation. Federal Highway Administration "Simulation, Imaging, and Mechanics of Asphalt Pavements (SIMAP) Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" , 2002 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Petros, Katherine A4 - Azari, Haleh A4 - Masad, Eyad A4 - Wang, Linbing AB - The SIMAP Laboratory provides FHWA and its customers with applications of diverse cutting-edge technologies that provide a complete description and understanding of pavement performance, including design and construction, and properties of asphalt pavements with long service lives. This highway research lab actively focuses on analysis of asphalt specimens sent from all over the United States. AN - dot:89327 KW - Laboratory tests KW - Laboratories KW - Asphalt pavements KW - Pavement performance LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2002-01-01 SN - FHWA-RD-02-093 TI - Simulation, Imaging, and Mechanics of Asphalt Pavements (SIMAP) Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89327 ER -
Binder Rheology Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]

United States. Department of Transportation. Federal Highway Administration

2002-01-01 | PDF

The Binder Rheology Laboratory conducts Superpave® performance-based binder (asphalt) specification testing, research and development, and advanced rheological research in binders (asphalts, modified asphalts, and mastics [binder and rock dust]) to improve the durability, longevity, quality, and life-cycle cost of asphalt pavements. One way to unde ...

03/09/2026

Title : Binder Rheology Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Bastian, Ernest Published Date : 2002-01-01 Report Number : FHWA-RD-02-081 URL : https://rosap.ntl.bts.gov/view/dot/89326 United States. Department of Transportation. Federal Highway Administration (2002). Binder Rheology Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]. United States. Department of Transportation. Federal Highway Administration "Binder Rheology Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" (2002) United States. Department of Transportation. Federal Highway Administration "Binder Rheology Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002]" , 2002 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Bastian, Ernest AB - The Binder Rheology Laboratory conducts Superpave® performance-based binder (asphalt) specification testing, research and development, and advanced rheological research in binders (asphalts, modified asphalts, and mastics [binder and rock dust]) to improve the durability, longevity, quality, and life-cycle cost of asphalt pavements. One way to understand and consequently extend pavement life is by studying the flow and deformation - the rheology - of the paving material. AN - dot:89326 KW - Laboratory tests KW - Laboratories KW - Binders KW - Bituminous binders KW - Rheology LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2002-01-01 SN - FHWA-RD-02-081 TI - Binder Rheology Laboratory Fact Sheet - Research that is Essential, Indispensable, and Connected to our Customers [2002] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89326 ER -
Experimental Products and Equipment for Highway Construction and Maintenance [1987]

Smith, Mitchell D.

1987-01-01 | PDF

This is a listing pertaining to the status of the research evaluation of products and equipment which may possibly be used in highway construction or maintenance by the Oklahoma Department of Transportation. Products and equipment are continually being evaluated and implemented into use by the Department. The status of their evaluation therefore is ...

03/09/2026

Title : Experimental Products and Equipment for Highway Construction and Maintenance [1987] Creator(s) : Smith, Mitchell D. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1987-01-01 Report Number : FHWA/OK 95(01) URL : https://rosap.ntl.bts.gov/view/dot/89325 Smith, Mitchell D. (1987). Experimental Products and Equipment for Highway Construction and Maintenance [1987]. Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance [1987]" (1987) Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance [1987]" , 1987 Export RIS Citation Information. TY - Tech Report AU - Smith, Mitchell D. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This is a listing pertaining to the status of the research evaluation of products and equipment which may possibly be used in highway construction or maintenance by the Oklahoma Department of Transportation. Products and equipment are continually being evaluated and implemented into use by the Department. The status of their evaluation therefore is continually changing as progress is made. Products and equipment that are approved by research evaluations are recommended for consideration for use by the Department. AN - dot:89325 ET - Annual -January, 1987 to January, 1988 KW - Equipment KW - Evaluation KW - Highway maintenance KW - Materials KW - New products KW - Road construction LA - English PB - Oklahoma. Department of Transportation PY - 1987-01-01 SN - FHWA/OK 95(01) TI - Experimental Products and Equipment for Highway Construction and Maintenance [1987] M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89325 ER -
Evaluating Regional Traffic Signal Performance Measures Using Crowd-Sourced Data in 2021 Urban Mobility Report [Policy Brief]

Jha, Kartikeya ;

Albert, Luke P.

2022-06-09 | PDF

The Urban Mobility Report (UMR) has been providing information on urban congestion levels in the U.S. for more than three decades. The UMR uses private-sector crowdsourced travel speed data from INRIX® combined with traditional public-agency roadway inventory data to measure mobility conditions. The current UMR statistics describe overall congestio ...

03/09/2026

Title : Evaluating Regional Traffic Signal Performance Measures Using Crowd-Sourced Data in 2021 Urban Mobility Report [Policy Brief] Creator(s) : Jha, Kartikeya;Albert, Luke P.;Albert, Debbie;Schrank, David; Corporate Creator(s) : Texas A&M Transportation Institute Corporate Contributor(s) : University of South Florida. National Institute for Congestion Reduction;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2022-06-09 DOI : https://doi.org/10.5038/CUTR-NICR-Y2-1.7 Jha, Kartikeya et al. (2022). Evaluating Regional Traffic Signal Performance Measures Using Crowd-Sourced Data in 2021 Urban Mobility Report [Policy Brief]. https://doi.org/10.5038/CUTR-NICR-Y2-1.7 Jha, Kartikeya et al. "Evaluating Regional Traffic Signal Performance Measures Using Crowd-Sourced Data in 2021 Urban Mobility Report [Policy Brief]" (2022), https://doi.org/10.5038/CUTR-NICR-Y2-1.7 Jha, Kartikeya et al. "Evaluating Regional Traffic Signal Performance Measures Using Crowd-Sourced Data in 2021 Urban Mobility Report [Policy Brief]" , 2022, https://doi.org/10.5038/CUTR-NICR-Y2-1.7 Export RIS Citation Information. TY - Brief AU - Jha, Kartikeya AU - Albert, Luke P. AU - Albert, Debbie AU - Schrank, David A2 - Texas A&M Transportation Institute A3 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - The Urban Mobility Report (UMR) has been providing information on urban congestion levels in the U.S. for more than three decades. The UMR uses private-sector crowdsourced travel speed data from INRIX® combined with traditional public-agency roadway inventory data to measure mobility conditions. The current UMR statistics describe overall congestion levels, but do not categorize causes of congestion. With the advent of improvements in the third-party provider data streams, it is now possible to quantify at least some aspects of the mobility contribution provided by enhanced traffic signal systems. This evaluation used detailed crowdsourced intersection traffic data collected by INRIX® to report on the performance of traffic signal systems. One week of October 2020 data for approximately 210,000 traffic signals in the United States was used for this study. INRIX has continued to exponentially expand their probe vehicle coverage and data quality. The use of this data allows agencies to leverage existing probe data for the measurement of traffic signal performance and improve traffic signal operations. This dataset is useful for evaluation of signal operations using traditional metrics such as average delay and level of service, in addition to newer metrics such as arrivals on green and traffic signal efficiency index. AN - dot:89324 DO - https://doi.org/10.5038/CUTR-NICR-Y2-1.7 KW - Data analysis KW - Datasets KW - Traffic signal control systems KW - Arterial highways KW - Traffic congestion KW - Automatic data collection systems KW - Performance KW - Probe vehicles KW - Traffic signals KW - Mobility KW - Urban areas LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2022-06-09 TI - Evaluating Regional Traffic Signal Performance Measures Using Crowd-Sourced Data in 2021 Urban Mobility Report [Policy Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89324 ER -
Computational Materials for Qualification and Certification (CM4QC) Strategy Document: Maturation of Computational Materials Methods for Aviation-Focused Qualification and Certification of Metal Additive Manufacturing (as an Example of Process-Intensive Materials)

Glaessgen, Edward H ;

Gorelik, Michael

2026-03-01 | PDF

This report was written to address the U.S. aviation industry’s need to increase the efficiency of qualification and certification (Q&C) of process-intensive aviation components through the maturation and adoption of computational materials (CM) methods. A key challenge in the introduction of these CM approaches is overcoming the valley of death, w ...

03/09/2026

Supporting Files

Title : Computational Materials for Qualification and Certification (CM4QC) Strategy Document: Maturation of Computational Materials Methods for Aviation-Focused Qualification and Certification of Metal Additive Manufacturing (as an Example of Process-Intensive Materials) Creator(s) : Glaessgen, Edward H;Gorelik, Michael;Battaile, Corbett C;Lamm, Derrick;Levine, Lyle E;Millwater, Harry R;Peralta-Duran, Alonso;Raghavan, Narendran;Rollett, Anthony D;Schwalbach, Edwin J; Corporate Creator(s) : United States. National Aeronautics and Space Administration;Sandia National Laboratories;Lockheed Martin;National Institute of Standards and Technology (U.S.);University of Texas at San Antonio;Honeywell Aerospace Advanced Technology;Carnegie Mellon University;Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio); Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 2026-03-01 Report Number : DOT/FAA/TC-26/10, NASA/TM-20260001729 DOI : https://doi.org/10.21949/cxrq-cf95 Glaessgen, Edward H et al. (2026). Computational Materials for Qualification and Certification (CM4QC) Strategy Document: Maturation of Computational Materials Methods for Aviation-Focused Qualification and Certification of Metal Additive Manufacturing (as an Example of Process-Intensive Materials). https://doi.org/10.21949/cxrq-cf95 Glaessgen, Edward H et al. "Computational Materials for Qualification and Certification (CM4QC) Strategy Document: Maturation of Computational Materials Methods for Aviation-Focused Qualification and Certification of Metal Additive Manufacturing (as an Example of Process-Intensive Materials)" (2026), https://doi.org/10.21949/cxrq-cf95 Glaessgen, Edward H et al. "Computational Materials for Qualification and Certification (CM4QC) Strategy Document: Maturation of Computational Materials Methods for Aviation-Focused Qualification and Certification of Metal Additive Manufacturing (as an Example of Process-Intensive Materials)" , 2026, https://doi.org/10.21949/cxrq-cf95 Export RIS Citation Information. TY - Tech Report AU - Glaessgen, Edward H AU - Gorelik, Michael AU - Battaile, Corbett C AU - Lamm, Derrick AU - Levine, Lyle E AU - Millwater, Harry R AU - Peralta-Duran, Alonso AU - Raghavan, Narendran AU - Rollett, Anthony D AU - Schwalbach, Edwin J A2 - United States. National Aeronautics and Space Administration A2 - Sandia National Laboratories A2 - Lockheed Martin A2 - National Institute of Standards and Technology (U.S.) A2 - University of Texas at San Antonio A2 - Honeywell Aerospace Advanced Technology A2 - Carnegie Mellon University A2 - Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio) A3 - United States. Department of Transportation. Federal Aviation Administration AB - This report was written to address the U.S. aviation industry’s need to increase the efficiency of qualification and certification (Q&C) of process-intensive aviation components through the maturation and adoption of computational materials (CM) methods. A key challenge in the introduction of these CM approaches is overcoming the valley of death, where promising low-TRL CM-based Q&C technologies struggle to progress toward industry deployment. Despite the inherent promise of CM capabilities, their application has been primarily limited to the early phases of the product development cycle due to insufficient trust in CM outputs, fragmented industry adoption, regulatory acceptance, and a lack of standardized frameworks for integrating computational methods into established Q&C practices. As the pace of technological advancement accelerates globally, increasing the speed and reducing the cost of innovation are critical to ensuring that U.S. industry remains competitive and can rapidly adopt new materials and manufacturing processes. By outlining industry needs, regulatory considerations, key software capabilities, validation strategies, uncertainty quantification, and the current state of computational methods and practices, this report provides a roadmap for building confidence in CM tools and integrating them into Q&C frameworks. It also introduces a simulation maturity framework and maturation pathways within a broader CM ecosystem, concluding with recommended next steps to drive progress in this critical domain. AN - dot:89323 DO - https://doi.org/10.21949/cxrq-cf95 KW - Finite element method KW - Fluid dynamics KW - Mathematical models KW - Simulation KW - Additives KW - Manufacturing KW - Aviation KW - Computational Materials LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026-03-01 SN - DOT/FAA/TC-26/10, NASA/TM-20260001729 TI - Computational Materials for Qualification and Certification (CM4QC) Strategy Document: Maturation of Computational Materials Methods for Aviation-Focused Qualification and Certification of Metal Additive Manufacturing (as an Example of Process-Intensive Materials) M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89323 ER -
Scour Around Bridge Piers in Oklahoma Streams [Interim]

Tyagi, Avdhesh K.

1987-03-01 | PDF

This study consisted of a hydrographic survey and determined maximum scour around the piers at eighteen selected bridges on the Cimarron, Arkansas, and Caney Rivers. The survey was performed soon after the 50- to 100-year-frequency flood in October, 1986. It was determined from the survey that maximum scour varied from 0.60 to 18 feet with depth of ...

03/09/2026

Title : Scour Around Bridge Piers in Oklahoma Streams [Interim] Creator(s) : Tyagi, Avdhesh K. Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1987-03-01 Report Number : FHWA/OK 87(2), Rept No 87-1 URL : https://rosap.ntl.bts.gov/view/dot/89322 Tyagi, Avdhesh K. (1987). Scour Around Bridge Piers in Oklahoma Streams [Interim]. Tyagi, Avdhesh K. "Scour Around Bridge Piers in Oklahoma Streams [Interim]" (1987) Tyagi, Avdhesh K. "Scour Around Bridge Piers in Oklahoma Streams [Interim]" , 1987 Export RIS Citation Information. TY - Tech Report AU - Tyagi, Avdhesh K. A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This study consisted of a hydrographic survey and determined maximum scour around the piers at eighteen selected bridges on the Cimarron, Arkansas, and Caney Rivers. The survey was performed soon after the 50- to 100-year-frequency flood in October, 1986. It was determined from the survey that maximum scour varied from 0.60 to 18 feet with depth of flow ranging between 0.75 to 25 feet. Visual inspection and measurement showed that a sandy river bed and clayey river bed in the three streams seemed to affect scour depth. Also, heavy damages occurred in overflow structures in flood plains rather than at piers in the main stream. Because design criteria for scour depths at piers are based mostly on laboratory work and because some bridges designed according to these criteria have failed, it is recommended that this study be extended to collect field data on the maximum scour at selected bridges over a four-year period. Field data will be collected four times a year for various high and low flow conditions. Laboratory and field data are to be analyzed and used to produce design criteria so that damages to bridge piers are minimized. Further laboratory and field data will be generated for different river-bed soils (sand, silt and clay) and for varying hydraulic conditions. AN - dot:89322 ET - Interim Report; November 1986 - March 1987 KW - Bridge design KW - Bridge piers KW - Bridges KW - Clay KW - Depth KW - Hydrographic surveying KW - Sand KW - Scour KW - Streambeds LA - English PB - Oklahoma. Department of Transportation PY - 1987-03-01 SN - FHWA/OK 87(2), Rept No 87-1 TI - Scour Around Bridge Piers in Oklahoma Streams [Interim] M3 - Tech Report N1 - United States N1 - 86-05-3, Item 2150 UR - https://rosap.ntl.bts.gov/view/dot/89322 ER -
Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services Into Ridesharing Mode

Quadrifoglio, Luca

;

Zhang, Cheng

2024-02-28 | PDF

This research introduces practical optimization model for implementing ride-sharing in taxi services and studies the effects of ride-sharing on the congestion status through the case study of Chicago. Ride-sharing combines trips into one ride-shared trip with the objective of maximizing the total mileage saving. This research proposes a multi-stage ...

03/09/2026

Title : Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services Into Ridesharing Mode Creator(s) : Quadrifoglio, Luca;Zhang, Cheng;Sun, Min-Ci;delle Monache, Maria Laura;Yeo, Yuneil; Corporate Creator(s) : Texas A&M Transportation Institute;University of California, Berkeley; Corporate Contributor(s) : University of South Florida. National Institute for Congestion Reduction;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2024-02-28 URL : https://rosap.ntl.bts.gov/view/dot/89321 Quadrifoglio, Luca et al. (2024). Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services Into Ridesharing Mode. Quadrifoglio, Luca et al. "Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services Into Ridesharing Mode" (2024) Quadrifoglio, Luca et al. "Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services Into Ridesharing Mode" , 2024 Export RIS Citation Information. TY - Tech Report AU - Quadrifoglio, Luca AU - Zhang, Cheng AU - Sun, Min-Ci AU - delle Monache, Maria Laura AU - Yeo, Yuneil A2 - Texas A&M Transportation Institute A2 - University of California, Berkeley A3 - University of South Florida. National Institute for Congestion Reduction A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This research introduces practical optimization model for implementing ride-sharing in taxi services and studies the effects of ride-sharing on the congestion status through the case study of Chicago. Ride-sharing combines trips into one ride-shared trip with the objective of maximizing the total mileage saving. This research proposes a multi-stage model to optimize rider matches, aiming to reduce the total travel distance and enhance the matching of multiple riders. To validate the effectiveness of the model, real taxi data from Chicago is used, demonstrating significant improvements in distance reduction. Next, this study conduct congestion analysis by investigating the differences in congestion before and after the implementation of ridesharing mode. The traffic state is assessed through the computed congestion index before being graphically represented on congestion maps. After comparing the congestion map of community areas and census tracts before and after ride-sharing, we conclude that ride-sharing can improve the overall congestion status at the city level. This is particularly crucial given the increasing public awareness of environmental issues and the need for sustainable transportation solutions in cities. AN - dot:89321 ET - Final Report KW - Ridesharing KW - Taxi services KW - Scheduling KW - Traffic congestion KW - Metropolitan areas KW - Case studies KW - Before and after studies KW - Data analysis KW - Environmental impacts LA - English PB - University of South Florida. National Institute for Congestion Reduction PY - 2024-02-28 TI - Quantifying the Effect on Congestion of Converting Metropolitan Taxi Services Into Ridesharing Mode M3 - Tech Report N1 - United States N1 - 69A3551947136 UR - https://rosap.ntl.bts.gov/view/dot/89321 ER -
Intersection Safety Performance Function Calibration for Project Planning and Design

Appiah, Justice

2026-03-01 | PDF

This study calibrated the predictive models for conventional intersections in the Highway Safety Manual (HSM) second edition draft to account for local conditions in Virginia. The calibration ensures that predictions made with the HSM safety performance functions accurately reflect the crash experience, driver population, and environmental characte ...

03/09/2026

Title : Intersection Safety Performance Function Calibration for Project Planning and Design Creator(s) : Appiah, Justice Corporate Creator(s) : Virginia Transportation Research Council (VTRC) Corporate Contributor(s) : Virginia. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-03-01 Report Number : FHWA/VTRC 26-R34 URL : https://rosap.ntl.bts.gov/view/dot/89320 Appiah, Justice (2026). Intersection Safety Performance Function Calibration for Project Planning and Design. Appiah, Justice "Intersection Safety Performance Function Calibration for Project Planning and Design" (2026) Appiah, Justice "Intersection Safety Performance Function Calibration for Project Planning and Design" , 2026 Export RIS Citation Information. TY - Tech Report AU - Appiah, Justice A2 - Virginia Transportation Research Council (VTRC) A3 - Virginia. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This study calibrated the predictive models for conventional intersections in the Highway Safety Manual (HSM) second edition draft to account for local conditions in Virginia. The calibration ensures that predictions made with the HSM safety performance functions accurately reflect the crash experience, driver population, and environmental characteristics of the state. Crash, traffic, and geometric data were collected for 1,326 intersections across Virginia, representing minor road stop-controlled, all-way stop-controlled, and signal-controlled configurations on rural two-lane, rural multilane, and urban or suburban arterial highways. The study followed HSM-recommended procedures to estimate calibration factors and dispersion parameters for the conventional intersection site-type safety performance functions in the HSM second edition draft. Constant calibration factors provided a good fit for total crashes, with 20 of 21 site types meeting HSM acceptance criteria, but they did not perform as well for fatal and injury crashes. Calibration functions offered a superior fit for those crash types, with 14 of 19 site types achieving percent cumulative residual deviations within 5%. It is recommended that the Virginia Department of Transportation Traffic Operations Division use the constant calibration factors in Table 11 for total crashes and the calibration functions in Table 12 for fatal and injury crashes and incorporate these results into the Traffic Operations and Safety Analysis Manual to ensure consistent statewide application. AN - dot:89320 ET - Final Report KW - Highway safety KW - Manuals KW - Safety management KW - Calibration KW - Intersections KW - Programming (Planning) KW - Design KW - Project management KW - Performance KW - Procedures KW - Data analysis KW - Crashes KW - Drivers KW - Rural areas KW - Signals KW - Safety Performance Function KW - Conventional Intersection LA - English PB - Virginia Transportation Research Council (VTRC) PY - 2026-03-01 SN - FHWA/VTRC 26-R34 TI - Intersection Safety Performance Function Calibration for Project Planning and Design M3 - Tech Report N1 - United States N1 - 124329 UR - https://rosap.ntl.bts.gov/view/dot/89320 ER -
Halifax County Road Orders 1752–1767

Miller, Ann Brush

2026-03-01 | PDF

The road history projects undertaken by the Virginia Transportation Research Council establish the feasibility of studies of early road networks and their use in the environmental review process. These projects, by gathering and publishing the early road orders of the vast parent counties and other significant areas, also lay the foundation for add ...

03/09/2026

Title : Halifax County Road Orders 1752–1767 Creator(s) : Miller, Ann Brush Corporate Creator(s) : Virginia Transportation Research Council (VTRC) Corporate Contributor(s) : Virginia. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-03-01 Report Number : FHWA/VTRC 26-R33 URL : https://rosap.ntl.bts.gov/view/dot/89319 Miller, Ann Brush (2026). Halifax County Road Orders 1752–1767. Miller, Ann Brush "Halifax County Road Orders 1752–1767" (2026) Miller, Ann Brush "Halifax County Road Orders 1752–1767" , 2026 Export RIS Citation Information. TY - Tech Report AU - Miller, Ann Brush A2 - Virginia Transportation Research Council (VTRC) A3 - Virginia. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The road history projects undertaken by the Virginia Transportation Research Council establish the feasibility of studies of early road networks and their use in the environmental review process. These projects, by gathering and publishing the early road orders of the vast parent counties and other significant areas, also lay the foundation for additional research by local groups over a broad area of Virginia. This volume marks the 32nd entry in the Historic Roads of Virginia series, initiated in 1973 by the Virginia Highway & Transportation Research Council (subsequently the Virginia Transportation Research Council). Halifax County Road Orders 1752-1767 furthers the coverage of the early southern Virginia transportation records begun in the previously published Brunswick County Road Orders 1732-1749, Lunenburg County Road Orders 1746-1764, and Amelia County Road Orders 17351753. This volume covers the period of Halifax County’s greatest extent, from its creation from Lunenburg County in 1752 until its division to create Pittsylvania County in 1767. By the mid-18th century, Halifax County contained important east-west and north-south transportation routes. The county’s early transportation records provide important information relating to transportation connections with not only neighboring counties and other counties farther to the north, east, and west in Virginia, but also with North Carolina (which is located immediately to the south of Halifax County). This publication will have particular application to the cultural resource research relating to transportation projects in this area of southern Virginia. This information will eliminate the need for further research into the early Halifax County road order records of 1752-1767. If questions arise about early roads once a Virginia Department of Transportation road improvement project is already underway, or nearly underway, primary historical research of this nature can take 6 to 12 months to complete. Therefore, this volume can be a source of potentially significant cost savings for the Virginia Department of Transportation, including the avoided costs of project delays and avoided consultant costs for cultural resource studies should questions arise. AN - dot:89319 ET - Final Report KW - History KW - Roads KW - Feasibility analysis KW - Research KW - Cultural factors KW - Environmental impacts KW - Transportation KW - Road improvements KW - Neighborhoods KW - Project management KW - Early Roads KW - Halifax County KW - Southern Virginia KW - Historic Roads LA - English PB - Virginia Transportation Research Council (VTRC) PY - 2026-03-01 SN - FHWA/VTRC 26-R33 TI - Halifax County Road Orders 1752–1767 M3 - Tech Report N1 - United States N1 - 124068 UR - https://rosap.ntl.bts.gov/view/dot/89319 ER -
Operational Baseline and Structural Health Monitoring for the 2nd Avenue Network Arch Bridge

Attanayake, Upul ;

Amunugama, Harsha

2025-12-31 | PDF

A unique network tied-arch bridge with free-standing arches was designed to carry 2nd Avenue traffic over Interstate (I-94) in Detroit, Michigan. This 245-ft-long, 96.5-ft-wide bridge, skewed at 18 degrees, is the first skewed, unbraced network arch bridge constructed in the United States. The superstructure frame was erected off-site at a bridge s ...

03/09/2026

Title : Operational Baseline and Structural Health Monitoring for the 2nd Avenue Network Arch Bridge Creator(s) : Attanayake, Upul;Amunugama, Harsha;Basnayake, Kanchani; Corporate Creator(s) : Western Michigan University. College of Engineering and Applied Sciences Corporate Contributor(s) : Michigan. Dept. of Transportation. Research Administration;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-12-31 Report Number : SPR-1762 URL : https://rosap.ntl.bts.gov/view/dot/89318 Attanayake, Upul et al. (2025). Operational Baseline and Structural Health Monitoring for the 2nd Avenue Network Arch Bridge. Attanayake, Upul and Amunugama, Harsha and Basnayake, Kanchani "Operational Baseline and Structural Health Monitoring for the 2nd Avenue Network Arch Bridge" (2025) Attanayake, Upul et al. "Operational Baseline and Structural Health Monitoring for the 2nd Avenue Network Arch Bridge" , 2025 Export RIS Citation Information. TY - Tech Report AU - Attanayake, Upul AU - Amunugama, Harsha AU - Basnayake, Kanchani A2 - Western Michigan University. College of Engineering and Applied Sciences A3 - Michigan. Dept. of Transportation. Research Administration A3 - United States. Department of Transportation. Federal Highway Administration AB - A unique network tied-arch bridge with free-standing arches was designed to carry 2nd Avenue traffic over Interstate (I-94) in Detroit, Michigan. This 245-ft-long, 96.5-ft-wide bridge, skewed at 18 degrees, is the first skewed, unbraced network arch bridge constructed in the United States. The superstructure frame was erected off-site at a bridge staging area and subsequently transported and placed over the I-94 freeway using self-propelled modular transporters and a lateral launching technique to complete construction. Based on observations from analytical models and discussions with the Engineer of Record (EOR), the peer review engineer, and the Michigan Department of Transportation (MDOT), an instrumentation system consisting of 112 vibrating wire sensors was designed to: (i) monitor strains in major structural components during construction to establish post-construction stress states; (ii) track strain changes during the service life to support bridge maintenance and load rating decisions; and (iii) collect sufficient data to verify key design assumptions. Of these sensors, 96 were embedded in the concrete during construction, and 16 were mounted on the hangers after erection of the arches and hangers. This instrumentation strategy enabled continuous monitoring of strains in the concrete frame and forces in the hangers, providing a clear understanding of the structural behavior throughout construction. The collection of a little more than two years of post-construction monitoring data provided valuable insight into the bridge’s behavior under service conditions. Analysis of the monitoring data demonstrates that the structure is performing within established design limits, thereby increasing confidence in the implementation of innovative structural systems and complex construction methods that minimize traffic disruption and enhance safety. Load testing results indicate that the bridge exhibits minimal sensitivity to live loads, with seasonal temperature variations governing the stresses developed in the structure. A fully functional monitoring system, along with operational stress limits for each instrumented location, was delivered to MDOT. This system enables continuous, data-driven monitoring of the bridge, facilitating timely identification of maintenance, repair, and load rating needs over the long term without reliance solely on traditional visual inspection methods. AN - dot:89318 ET - Final Report: 01/01/2022 – 12/31/2025 KW - Accelerated bridge construction KW - Concrete tests KW - Load tests KW - Networks KW - Arches KW - Posttensioning KW - Modular structures KW - Structural health monitoring KW - Analysis KW - Arch bridges KW - Bridge construction LA - English PB - Michigan Department of Transportation. Research Administration PY - 2025-12-31 SN - SPR-1762 TI - Operational Baseline and Structural Health Monitoring for the 2nd Avenue Network Arch Bridge M3 - Tech Report N1 - United States N1 - 2019-0313z8 UR - https://rosap.ntl.bts.gov/view/dot/89318 ER -
Micro Surfacing with Natural Latex Modified Emulsion

Pederson, Carl M.

1986-11-01 | PDF

This is the final report for the use of emulsified asphalt in a relatively new process called "Ralumac Micro Surfacing". This process was developed in Germany and was first used in the United States in late 1980. In 1982, personnel from the Oklahoma Department of Transportation (ODOT) Observed projects in another state and proposed a project in Okl ...

03/09/2026

Title : Micro Surfacing with Natural Latex Modified Emulsion Creator(s) : Pederson, Carl M. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1986-11-01 Report Number : FHWA/OK 86(7) URL : https://rosap.ntl.bts.gov/view/dot/89317 Pederson, Carl M. (1986). Micro Surfacing with Natural Latex Modified Emulsion. Pederson, Carl M. "Micro Surfacing with Natural Latex Modified Emulsion" (1986) Pederson, Carl M. "Micro Surfacing with Natural Latex Modified Emulsion" , 1986 Export RIS Citation Information. TY - Tech Report AU - Pederson, Carl M. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This is the final report for the use of emulsified asphalt in a relatively new process called "Ralumac Micro Surfacing". This process was developed in Germany and was first used in the United States in late 1980. In 1982, personnel from the Oklahoma Department of Transportation (ODOT) Observed projects in another state and proposed a project in Oklahoma. AN - dot:89317 ET - Final Report. 6-83 thur 10-86 KW - Seal coats KW - Emulsified asphalt KW - Field tests KW - Latex asphalt KW - Rutting KW - Microsurfacing LA - English PB - Oklahoma. Department of Transportation PY - 1986-11-01 SN - FHWA/OK 86(7) TI - Micro Surfacing with Natural Latex Modified Emulsion M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89317 ER -
Research and Development and Design of a Steerable Transit Truck

Horwat, J. W.

1990-03-01 | PDF

This program was initiated as the result of the findings of the WMATA wheel wear/track wear study. Because of the close wheel/track tolerance and flange profile, WMATA noted a wear rate in both wheel and track which was several times higher than anticipated. Because earlier studies of a steerable truck concept had never been completed, WMATA reques ...

03/09/2026

Title : Research and Development and Design of a Steerable Transit Truck Creator(s) : Horwat, J. W. Corporate Creator(s) : Washington Metropolitan Area Transit Administration;UTDC Incorporated; Corporate Contributor(s) : United States. Department of Transportation. Urban Mass Transportation Administration Published Date : 1990-03-01 Report Number : UMTA-DC-06-0362-90-1, TR 443 700 001 URL : https://rosap.ntl.bts.gov/view/dot/89316 Horwat, J. W. (1990). Research and Development and Design of a Steerable Transit Truck. Horwat, J. W. "Research and Development and Design of a Steerable Transit Truck" (1990) Horwat, J. W. "Research and Development and Design of a Steerable Transit Truck" , 1990 Export RIS Citation Information. TY - Tech Report AU - Horwat, J. W. A2 - Washington Metropolitan Area Transit Administration A2 - UTDC Incorporated A3 - United States. Department of Transportation. Urban Mass Transportation Administration AB - This program was initiated as the result of the findings of the WMATA wheel wear/track wear study. Because of the close wheel/track tolerance and flange profile, WMATA noted a wear rate in both wheel and track which was several times higher than anticipated. Because earlier studies of a steerable truck concept had never been completed, WMATA requested UMTA assistance to complete the evaluation. The program objective was to design, analyze and recommend a steerable truck retrofit to the Washington Metro Rockwell trucks. The design features two-point, body-to-axle steering and replacement of the axle bearing rubber sleeve and end cap with an axle bearing box, top mount and laminated rubber/steel sandwiches. Steering input is by lever and push/pull rods. The brake housing-to-side frame mountings are modified to ensure maximum pad/disc contact area. The incorporated design was computer analyzed mathematically for performance with respect to dynamic stability and curving ability. The results of the analyses define a stable vehicle within the dynamic envelope of the WMATA system and flange-free curving ability on curves of radii above 500 feet. Because of the large design change at the side frame/axle interface, a finite element stress analysis was performed resulting in the requirement for a preliminary design side frame reinforcing cap to be welded to the side frame. AN - dot:89316 ET - Final Report KW - Design KW - Development KW - Noise control KW - Railroad rails KW - Rapid transit cars KW - Research KW - Wear KW - Wheels LA - English PB - United States. Department of Transportation. Urban Mass Transportation Administration PY - 1990-03-01 SN - UMTA-DC-06-0362-90-1, TR 443 700 001 TI - Research and Development and Design of a Steerable Transit Truck M3 - Tech Report N1 - United States N1 - UMTA-DC-06-0362 UR - https://rosap.ntl.bts.gov/view/dot/89316 ER -
An Upgrade Plan for FHWA Roadway Safety Simulation Models

Mcculough, Mike

1994-12-01 | PDF

Current Federal Highway Administration (FHWA) models were reviewed and the key mathematical formulations important to roadside hardware were defined. The review included identification of the important handling models as well as finite element based formulations. An outline for a single common user interface that organizes and automates data commun ...

03/09/2026

Title : An Upgrade Plan for FHWA Roadway Safety Simulation Models Creator(s) : Mcculough, Mike Corporate Creator(s) : FMC Corporation Corporate Contributor(s) : United States. Federal Highway Administration. Office of Safety and Traffic Operations R&D Contributor(s) : Viner, John Published Date : 1994-12-01 Report Number : FHWA-RD-93-189 URL : https://rosap.ntl.bts.gov/view/dot/89315 Mcculough, Mike (1994). An Upgrade Plan for FHWA Roadway Safety Simulation Models. Mcculough, Mike "An Upgrade Plan for FHWA Roadway Safety Simulation Models" (1994) Mcculough, Mike "An Upgrade Plan for FHWA Roadway Safety Simulation Models" , 1994 Export RIS Citation Information. TY - Tech Report AU - Mcculough, Mike A2 - FMC Corporation A3 - United States. Federal Highway Administration. Office of Safety and Traffic Operations R&D A4 - Viner, John A4 - Viner, John AB - Current Federal Highway Administration (FHWA) models were reviewed and the key mathematical formulations important to roadside hardware were defined. The review included identification of the important handling models as well as finite element based formulations. An outline for a single common user interface that organizes and automates data communications between and among the modeling capabilities was prepared. A survey of the vendors of nonlinear finite element analysis (FEA) codes was conducted as well as the collection of data defining computational requirements for the types of problems the FHWA would be considering in the design process. These data formed the basis for a recommended nonlinear FEA code. This study concluded that the public domain version of the DYNNNIKE suite of codes was preferred. A prototypical single common user interface was constructed and demonstrated. This demonstration software contained example programs of various kinds to illustrate functionality and key simulation technologies that st:10uld be developed in addition to nonlinear FEA. In particular, a prototype interactive vehicle dynamics model (IVM) was demonstrated. The interactive vehicle model demonstration was used to illustrate a "drive-through" capability for evaluating roadway design created on computer aided roadway design systems. AN - dot:89315 ET - Final Report KW - Simulation KW - Traffic models KW - Traffic safety KW - Highway safety LA - English PB - United States. Federal Highway Administration. Office of Safety and Traffic Operations PY - 1994-12-01 SN - FHWA-RD-93-189 TI - An Upgrade Plan for FHWA Roadway Safety Simulation Models M3 - Tech Report N1 - United States N1 - DTFH61-91-C-00097 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89315 ER -
Authorship Policy [Memorandum]

Everett, Thomas D.

2022-02-22 | PDF

This Policy will ensure that Federal Highway Administration staff and individuals that make substantial intellectual contributions to scientific and technical products such as, but not limited to, the American Concrete Institute Journals, American Journal of Physics, American Society of Civil Engineers, Institute of Electrical and Electronics Engin ...

03/09/2026

Title : Authorship Policy [Memorandum] Creator(s) : Everett, Thomas D. Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Baker, Shana Published Date : 2022-02-22 URL : https://rosap.ntl.bts.gov/view/dot/89314 Everett, Thomas D. (2022). Authorship Policy [Memorandum]. Everett, Thomas D. "Authorship Policy [Memorandum]" (2022) Everett, Thomas D. "Authorship Policy [Memorandum]" , 2022 Export RIS Citation Information. TY - Memorandum AU - Everett, Thomas D. A2 - United States. Department of Transportation. Federal Highway Administration A4 - Baker, Shana AB - This Policy will ensure that Federal Highway Administration staff and individuals that make substantial intellectual contributions to scientific and technical products such as, but not limited to, the American Concrete Institute Journals, American Journal of Physics, American Society of Civil Engineers, Institute of Electrical and Electronics Engineers are listed as contributors of the work product. Authorship and publication of scientific and technical products are important to the authors of these products, as authorship and publication influence their reputation and it establishes accountability and informs the public of those responsible for the information and conclusions of FHWA work products. AB - From: Thomas D. Everett, Executive Director, Office of The Federal Highway, Administrator. To: Associate Administrators, Chief Counsel, Chief Technical Services Officer, Directors of Field Services AN - dot:89314 KW - Policy KW - Guidelines KW - Information dissemination KW - Researchers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2022-02-22 TI - Authorship Policy [Memorandum] M3 - Memorandum N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89314 ER -
Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings [1986]

Allen, Gregory D ;

Murray, Thomas M.,

1986-08-01 | PDF

Twelve skewed elastomeric expansion bridge bearings were supplied by the Oklahoma Department of Transportation. To evaluate the performance of these skewed bearings, the following six phases of testing were conducted on each of the twelve bearings: I. Shear and compressive stiffness tests, II. Fatigue cycles representing 50 years of service with pa ...

03/09/2026

Title : Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings [1986] Creator(s) : Allen, Gregory D;Murray, Thomas M.,; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1986-08-01 Report Number : FHWA/OK 86(5) URL : https://rosap.ntl.bts.gov/view/dot/89313 Allen, Gregory D and Murray, Thomas M., (1986). Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings [1986]. Allen, Gregory D and Murray, Thomas M., "Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings [1986]" (1986) Allen, Gregory D and Murray, Thomas M., "Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings [1986]" , 1986 Export RIS Citation Information. TY - Tech Report AU - Allen, Gregory D AU - Murray, Thomas M., A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Twelve skewed elastomeric expansion bridge bearings were supplied by the Oklahoma Department of Transportation. To evaluate the performance of these skewed bearings, the following six phases of testing were conducted on each of the twelve bearings: I. Shear and compressive stiffness tests, II. Fatigue cycles representing 50 years of service with parallel bearing surfaces, III. Shear and compressive stiffness tests, IV. Shear stiffness tests with bearings at sub-freezing temperatures, V. Fatigue cycles representing 50 years of service with rotated bearing surfaces, and VI. Shear stiffness tests Phase I formed the basis of comparison with the post-fatigue results from Phases III and VI, and the low temperature tests from Phase IV. It was found that the fatigue loading with parallel bearing surfaces had very little effect on the compressive and shear stiffnesses of the skewed bearings. Some degradation of shear stiffness was found after the fatigue loading with rotated bearing surfaces, Phase V. However, the combined degradation due to both fatigue loadings was considered insignificant. AN - dot:89313 ET - Final Report KW - Skew bridges KW - Bridge engineering KW - Elastomers KW - Stiffness KW - Shear modulus KW - Bridges KW - Expansion device LA - English PB - Oklahoma. Department of Transportation PY - 1986-08-01 SN - FHWA/OK 86(5) TI - Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings [1986] M3 - Tech Report N1 - United States N1 - 34, 84-11-2 UR - https://rosap.ntl.bts.gov/view/dot/89313 ER -
Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings

Allen, Gregory D ;

Murray, Thomas M.,

1987-04-01 | PDF

Twelve skewed elastomeric expansion bridge bearings were supplied by the Oklahoma Department of Transportation. To evaluate the performance of these skewed bearings, the following six phases of testing were conducted on each of the twelve bearings: I. Shear and compressive stiffness tests, II. Fatigue cycles representing 50 years of service with pa ...

03/09/2026

Title : Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings Creator(s) : Allen, Gregory D;Murray, Thomas M.,; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1987-04-01 Report Number : FHWA/OK 87(3) URL : https://rosap.ntl.bts.gov/view/dot/89312 Allen, Gregory D and Murray, Thomas M., (1987). Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings. Allen, Gregory D and Murray, Thomas M., "Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings" (1987) Allen, Gregory D and Murray, Thomas M., "Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings" , 1987 Export RIS Citation Information. TY - Tech Report AU - Allen, Gregory D AU - Murray, Thomas M., A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Twelve skewed elastomeric expansion bridge bearings were supplied by the Oklahoma Department of Transportation. To evaluate the performance of these skewed bearings, the following six phases of testing were conducted on each of the twelve bearings: I. Shear and compressive stiffness tests, II. Fatigue cycles representing 50 years of service with parallel bearing surfaces, III. Shear and compressive stiffness tests, IV. Shear stiffness tests with bearings at sub-freezing temperatures, V. Fatigue cycles representing 50 years of service with rotated bearing surfaces, and VI. Shear stiffness tests Phase I formed the basis of comparison with the post-fatigue results from Phases III and VI, and the low temperature tests from Phase IV. It was found that the fatigue loading with parallel bearing surfaces had very little effect on the compressive and shear stiffnesses of the skewed bearings. Some degradation of shear stiffness was found after the fatigue loading with rotated bearing surfaces, Phase V. However, the combined degradation due to both fatigue loadings was considered insignificant. AN - dot:89312 ET - Executive Summary Jan, 85 - April'87 KW - Skew bridges KW - Bridge engineering KW - Elastomers KW - Stiffness KW - Shear modulus KW - Bridges KW - Expansion device LA - English PB - Oklahoma. Department of Transportation PY - 1987-04-01 SN - FHWA/OK 87(3) TI - Experimental Investigation of Skewed Elastomeric Expansion Bridge Bearings M3 - Tech Report N1 - United States N1 - 034, 84-11-2 UR - https://rosap.ntl.bts.gov/view/dot/89312 ER -
Roadside Development and Erosion Control [1987]

Brede, A. D. ;

Cargill, L. M.

1987-06-30 | PDF

The information contained within this report addresses: 1) implementation of roadside development and erosion control results, 2) herbicide evaluation for the effective and economical eradication of undesirable roadside vegetation, 3) evaluation of species and cultural practices for ground cover establishment, and 4) fertilizer evaluations for main ...

03/09/2026

Title : Roadside Development and Erosion Control [1987] Creator(s) : Brede, A. D.;Cargill, L. M.;Montgomery, D. P.;Samples, T. J.; Corporate Creator(s) : Oklahoma State University. Department of Horticulture and Landscape Architecture Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1987-06-30 Report Number : FHWA/OK 87(5), OK Proj No 81-04-3 URL : https://rosap.ntl.bts.gov/view/dot/89311 Brede, A. D. et al. (1987). Roadside Development and Erosion Control [1987]. Brede, A. D. et al. "Roadside Development and Erosion Control [1987]" (1987) Brede, A. D. et al. "Roadside Development and Erosion Control [1987]" , 1987 Export RIS Citation Information. TY - Tech Report AU - Brede, A. D. AU - Cargill, L. M. AU - Montgomery, D. P. AU - Samples, T. J. A2 - Oklahoma State University. Department of Horticulture and Landscape Architecture A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The information contained within this report addresses: 1) implementation of roadside development and erosion control results, 2) herbicide evaluation for the effective and economical eradication of undesirable roadside vegetation, 3) evaluation of species and cultural practices for ground cover establishment, and 4) fertilizer evaluations for maintenance of ground covers. The following are recommendations based upon the research results: (1) For control of johnsongrass alone or intermixed with silver bluestem, and bermudagrass release, apply 1.5 pints of Roundup plus 2 ounces of Oust in 20 to 40 gallons of water per acre during May after the bermudagrass has broken dormancy. (2) To control silver bluestem alone, apply 1.5 to 2.0 pints of Roundup in 20 to 40 gallons of water per acre during May, prior to seedhead formation. (3) For brush control: a) June application of 1 gallon Tordon K plus 1 gallon Garlon 4 in 50 gallons of water per acre (broadcast) or 100 gallons of water per acre (applied with handgun and spraying foliage to wet), or b) Krenite S at 3 gallons plus a crop oil in 50 gallons of water per acre (broadcast) or in 100 gallons of water per acre (handgun) applied in August to October, prior to first fall coloration, or c) Roundup at 1.5 gallons in 98.5 gallons of water per acre and applied as a spot-treatment with handgun only. (4) Kochia can be effectively controlled with a preemergence application of Karmex 80W at 3 pounds product in 25 to 40 gallons of water per acre, applied in February or early March, or a postemergence application of Banvel at 0.5 pounds active ingredient in 25 to 40 gallons of water per acre, applied in May or early June. (5) For preemergence control of annual grasses and broadleaf weeds, apply atrazine at 2 pounds active ingredient in 20 to 40 gallons of water per acre in February and not later than March 15. Karmex 80W can be used also at the same rate as given above for Kochia control. AN - dot:89311 ET - Final Report KW - Design KW - Erosion control KW - Highways KW - Roadside improvement KW - Soils KW - Vegetation KW - Weed control KW - Ground cover KW - Herbicides KW - Vegetation control LA - English PB - Oklahoma. Department of Transportation PY - 1987-06-30 SN - FHWA/OK 87(5), OK Proj No 81-04-3 TI - Roadside Development and Erosion Control [1987] M3 - Tech Report N1 - United States N1 - 81-04-3 UR - https://rosap.ntl.bts.gov/view/dot/89311 ER -
Construction and Performance of the Stabilized Base Course on U.S. 77 Ponca City, Kay County

Laguros, Joakim G. ;

Keshawarz, M Saleh

1987-07-05 | PDF

This study investigates the field implementation of shale stabilization on an experimental project. A number of test sections were set on the south bound lane of U.S. Highway 77, north of Ponca City, Kay County, Oklahoma. To compare the effectiveness of various stabilizing agents, the base courses of these test sections were stabilized with cement ...

03/09/2026

Title : Construction and Performance of the Stabilized Base Course on U.S. 77 Ponca City, Kay County Creator(s) : Laguros, Joakim G.;Keshawarz, M Saleh; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1987-07-05 Report Number : FHWA/OK 87(7), ORA 155-487, ODOT Study 83-07-2 URL : https://rosap.ntl.bts.gov/view/dot/89310 Laguros, Joakim G. and Keshawarz, M Saleh (1987). Construction and Performance of the Stabilized Base Course on U.S. 77 Ponca City, Kay County. Laguros, Joakim G. and Keshawarz, M Saleh "Construction and Performance of the Stabilized Base Course on U.S. 77 Ponca City, Kay County" (1987) Laguros, Joakim G. and Keshawarz, M Saleh "Construction and Performance of the Stabilized Base Course on U.S. 77 Ponca City, Kay County" , 1987 Export RIS Citation Information. TY - Tech Report AU - Laguros, Joakim G. AU - Keshawarz, M Saleh A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This study investigates the field implementation of shale stabilization on an experimental project. A number of test sections were set on the south bound lane of U.S. Highway 77, north of Ponca City, Kay County, Oklahoma. To compare the effectiveness of various stabilizing agents, the base courses of these test sections were stabilized with cement (14%), quicklime (4.5%), fly ash (25%), and an optimum mixture of 8% cement plus 3% quicklime plus 18% fly ash used conjunctively. Also a control (non-stabilized) section was set as a reference section. Analyses of the samples prepared during construction and those cored from under the pavement after construction showed significant amelioration of the engineering properties of stabilized shale as manifested by their plasticity, compressive and beam strength compared to raw (non-stabilized) shale. Benkelman beam measurements ascertained the improvement in deformation resistance. The microstructure of stabilized shale was studied using X-ray diffraction (XRD). The non basal (hkl) reflections in stabilized oriented specimens suggest that the clay particles in the stabilized shale acquired high resistance to dispersive forces. This, together with the reduction in the integrated intensities of clay minerals help explain the improved stability as a result of stabilization. SEM observations in conjunction with EDS, depicted the presence of some newly formed hydration products and a rather dense degree of packing. The various data converge to the conclusion that field stabilization is a viable solution to the use of expansive shales. AN - dot:89310 KW - Alternatives analysis KW - Benkelman beam KW - Calcium oxide KW - Cement KW - Compressive strength KW - Deformation LA - English PB - Oklahoma. Department of Transportation PY - 1987-07-05 SN - FHWA/OK 87(7), ORA 155-487, ODOT Study 83-07-2 TI - Construction and Performance of the Stabilized Base Course on U.S. 77 Ponca City, Kay County M3 - Tech Report N1 - United States N1 - 83-07-2, Item 2128 UR - https://rosap.ntl.bts.gov/view/dot/89310 ER -
Fabric Form With Cement Fly Ash Mixture for Erosion and Sediment Control

Etti-Williams, Jimmy L

1987-12-01 | PDF

A study was conducted in Oklahoma in 1983 to determine the performance of fabric form mats filled with different proportions of fly ash cement grout mixtures. They were used to repair a 285 ft long severely eroded ditch. The mat was filled with three different mixtures. They were composed of 100 percent cement, a 50-50 mixture of fly ash and cement ...

03/09/2026

Title : Fabric Form With Cement Fly Ash Mixture for Erosion and Sediment Control Creator(s) : Etti-Williams, Jimmy L Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1987-12-01 Report Number : FHWA/OK 87 (8) URL : https://rosap.ntl.bts.gov/view/dot/89309 Etti-Williams, Jimmy L (1987). Fabric Form With Cement Fly Ash Mixture for Erosion and Sediment Control. Etti-Williams, Jimmy L "Fabric Form With Cement Fly Ash Mixture for Erosion and Sediment Control" (1987) Etti-Williams, Jimmy L "Fabric Form With Cement Fly Ash Mixture for Erosion and Sediment Control" , 1987 Export RIS Citation Information. TY - Tech Report AU - Etti-Williams, Jimmy L A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - A study was conducted in Oklahoma in 1983 to determine the performance of fabric form mats filled with different proportions of fly ash cement grout mixtures. They were used to repair a 285 ft long severely eroded ditch. The mat was filled with three different mixtures. They were composed of 100 percent cement, a 50-50 mixture of fly ash and cement and an 80 percent fly ash 20 percent cement mixture. AN - dot:89309 ET - Final Report, August, 1982 -· January, 1987 KW - Fabrics KW - Erosion KW - Abrasion KW - Grout KW - Fly ash LA - English PB - Oklahoma. Department of Transportation PY - 1987-12-01 SN - FHWA/OK 87 (8) TI - Fabric Form With Cement Fly Ash Mixture for Erosion and Sediment Control M3 - Tech Report N1 - United States N1 - HPR-10 (10), Part II UR - https://rosap.ntl.bts.gov/view/dot/89309 ER -
Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1988]

Smith, Mitchell D.

1988-01-01 | PDF

This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the ...

03/09/2026

Title : Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1988] Creator(s) : Smith, Mitchell D. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1988-01-01 Report Number : FHWA/OK 88 (01) URL : https://rosap.ntl.bts.gov/view/dot/89308 Smith, Mitchell D. (1988). Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1988]. Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1988]" (1988) Smith, Mitchell D. "Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1988]" , 1988 Export RIS Citation Information. TY - Tech Report AU - Smith, Mitchell D. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the progress or result of the evaluation. The following categories are covered in this year's report: Adhesives; Barriers, Fencing and Roadside Structures; Bituminous Materials; Culverts and Drainage Structures; Deicing Chemicals; Joint Sealers and Fillers; Miscellaneous; Mulch and Erosion Control; Patching Materials; Paving Fabrics; PCC Admixtures; PCC Curing Materials; PCC Finishing Products; Rust Passivators; Soil Sterilization and Weed Control; Soil Treatments; Structural Paints; Testing and Construction Equipment; Traffic Marking Materials; Waterproofing Membranes and Materials. AN - dot:89308 ET - Annual - January, 1988 to January, 1989 KW - Adhesives KW - Admixtures KW - Annual reports KW - Bituminous materials KW - Construction equipment KW - Culverts KW - Deicing chemicals KW - Equipment KW - Fabrics KW - Herbicides KW - Highway maintenance KW - Joint fillers KW - Joint sealers KW - Testing equipment LA - English PB - Oklahoma. Department of Transportation PY - 1988-01-01 SN - FHWA/OK 88 (01) TI - Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1988] M3 - Tech Report N1 - United States N1 - 73-06-1 UR - https://rosap.ntl.bts.gov/view/dot/89308 ER -
Scour Around Bridge Piers of Overflow Structures at I–35 Bridge on the Cimarron River

Tyagi, Avdhesh K.

1988-04-01 | PDF

The October 1986 flood of the Cimarron River resulted in severe scour around piers of eight overflow structures of the 1-35 bridge. A major portion of the flood I passed through these structures resulting in a high velocity of flow. Furthermore, the bridge is located on a meander, and that leads to a skewed, flow in the flood plain. This fact cause ...

03/09/2026

Title : Scour Around Bridge Piers of Overflow Structures at I–35 Bridge on the Cimarron River Creator(s) : Tyagi, Avdhesh K. Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1988-04-01 Report Number : FHWA/OK 88(02) URL : https://rosap.ntl.bts.gov/view/dot/89307 Tyagi, Avdhesh K. (1988). Scour Around Bridge Piers of Overflow Structures at I–35 Bridge on the Cimarron River. Tyagi, Avdhesh K. "Scour Around Bridge Piers of Overflow Structures at I–35 Bridge on the Cimarron River" (1988) Tyagi, Avdhesh K. "Scour Around Bridge Piers of Overflow Structures at I–35 Bridge on the Cimarron River" , 1988 Export RIS Citation Information. TY - Tech Report AU - Tyagi, Avdhesh K. A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The October 1986 flood of the Cimarron River resulted in severe scour around piers of eight overflow structures of the 1-35 bridge. A major portion of the flood I passed through these structures resulting in a high velocity of flow. Furthermore, the bridge is located on a meander, and that leads to a skewed, flow in the flood plain. This fact caused additional scour around the piers. The scour was measured using the Electronic Distance Meter. After the flood receded, the maximum depth of scour ranged from IO feet to 30 feet. AN - dot:89307 ET - Interim Report May 1987 - Apri 1 1988 KW - Bridge piers KW - Bridges KW - Scour KW - Deterioration by environmental action KW - Floods KW - Overflows KW - Field studies LA - English PB - Oklahoma. Department of Transportation PY - 1988-04-01 SN - FHWA/OK 88(02) TI - Scour Around Bridge Piers of Overflow Structures at I–35 Bridge on the Cimarron River M3 - Tech Report N1 - United States N1 - 2150 UR - https://rosap.ntl.bts.gov/view/dot/89307 ER -
Evaluation of Ice Warning Systems

Nelson, Thane I

1988-10-01 | PDF

Two ice warning systems were installed on the Interstate highway system in the Oklahoma City area. A Boschung Company, Inc. Ice Early Warning System was installed on three elevated structures or bridges. A Surface Systems Inc. SCAN System was installed on one of the structures. The systems were evaluated for two winter seasons. The primary objecti. ...

03/09/2026

Title : Evaluation of Ice Warning Systems Creator(s) : Nelson, Thane I Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1988-10-01 Report Number : FHWA/OK 88(03) URL : https://rosap.ntl.bts.gov/view/dot/89306 Nelson, Thane I (1988). Evaluation of Ice Warning Systems. Nelson, Thane I "Evaluation of Ice Warning Systems" (1988) Nelson, Thane I "Evaluation of Ice Warning Systems" , 1988 Export RIS Citation Information. TY - Tech Report AU - Nelson, Thane I A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Two ice warning systems were installed on the Interstate highway system in the Oklahoma City area. A Boschung Company, Inc. Ice Early Warning System was installed on three elevated structures or bridges. A Surface Systems Inc. SCAN System was installed on one of the structures. The systems were evaluated for two winter seasons. The primary objecti.ve of the evaluation was to determine the da??a accuracy and reliability and the durability of the equipment in the operational environment. The Boschung system was used by a field maintenance division to augment their weather surveillance methods and as an aid to gain knowledge on icing conditions. AN - dot:89306 ET - Final Report, August, 1985 to June, 1987 KW - Ice KW - Evaluation and assessment KW - Warning systems KW - Hazards LA - English PB - Oklahoma. Department of Transportation PY - 1988-10-01 SN - FHWA/OK 88(03) TI - Evaluation of Ice Warning Systems M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89306 ER -
Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1989]

Williams, Gary G.

1989-01-01 | PDF

This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the ...

03/09/2026

Title : Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1989] Creator(s) : Williams, Gary G. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1989-01-01 Report Number : FHWA/OK 89 (01) URL : https://rosap.ntl.bts.gov/view/dot/89305 Williams, Gary G. (1989). Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1989]. Williams, Gary G. "Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1989]" (1989) Williams, Gary G. "Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1989]" , 1989 Export RIS Citation Information. TY - Tech Report AU - Williams, Gary G. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the progress or result of the evaluation. AN - dot:89305 ET - Annual Report, January, 1988 to January_,_ 1989 KW - Adhesives KW - Admixtures KW - Annual reports KW - Bituminous materials KW - Construction equipment KW - Culverts KW - Deicing chemicals KW - Equipment KW - Fabrics KW - Herbicides KW - Highway maintenance KW - Joint fillers KW - Joint sealers KW - Testing equipment LA - English PB - Oklahoma. Department of Transportation PY - 1989-01-01 SN - FHWA/OK 89 (01) TI - Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1989] M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89305 ER -
Depressed Transverse Cracks in Asphalt Pavements in Oklahoma: Phase I

Snethen, Donald R. ;

Ahmed, Sumaya

1989-05-01 | PDF

Transverse cracking of asphalt pavements is a costly pavement distress occurring in states that experience cold/freezing temperatures during the winter months. The cracks are caused by low temperature-induced tensile stresses that exceed the tensile strength of the pavement material. The majority of these cracks occur in the transverse direction re ...

03/09/2026

Title : Depressed Transverse Cracks in Asphalt Pavements in Oklahoma: Phase I Creator(s) : Snethen, Donald R.;Ahmed, Sumaya; Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1989-05-01 Report Number : FHWA/OK 89( 02) URL : https://rosap.ntl.bts.gov/view/dot/89304 Snethen, Donald R. and Ahmed, Sumaya (1989). Depressed Transverse Cracks in Asphalt Pavements in Oklahoma: Phase I. Snethen, Donald R. and Ahmed, Sumaya "Depressed Transverse Cracks in Asphalt Pavements in Oklahoma: Phase I" (1989) Snethen, Donald R. and Ahmed, Sumaya "Depressed Transverse Cracks in Asphalt Pavements in Oklahoma: Phase I" , 1989 Export RIS Citation Information. TY - Tech Report AU - Snethen, Donald R. AU - Ahmed, Sumaya A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Transverse cracking of asphalt pavements is a costly pavement distress occurring in states that experience cold/freezing temperatures during the winter months. The cracks are caused by low temperature-induced tensile stresses that exceed the tensile strength of the pavement material. The majority of these cracks occur in the transverse direction relative to the pavement and with regular frequency along the roadway. The major objectives of this research included: (1) Determine the nature and extent of transverse cracking in asphalt pavements in Oklahoma; (2) Conduct a field and laboratory investigation of pavement materials and highway features to determine and evaluate the various factors that influence transverse cracking; and (3) Review ODOT practices for dealing with transverse cracking of asphalt pavements. The results of the research project confirm that the transverse cracking of pavements is a thermally induced problem. Based on evaluation of collected data, the number of cracks increased, and the average spacing decreased as the average low monthly temperature decreased. Depressions associated with transverse cracks were influenced by subgrade moisture conditions; specifically, as the average subgrade moisture content increased, the occurrence and severity of the depressions increased. Transverse cracking and particularly depressed transverse cracks appear to be more of a problem on fine-grained soil subgrades. Transverse cracking of asphalt pavements is a problem across the state of Oklahoma with severity of the problem varying from division to division based on such factors as pavement age, pavement cross section, traffic, asphalt properties, and maintenance procedures. Although maintenance and remedial procedures vary across the state, ODOT's procedures are consistent with those reported by surrounding states. AN - dot:89304 ET - Interim Report, February to September 1988 KW - Asphalt pavements KW - Field studies KW - Fine grained soils KW - Laboratory tests KW - Low temperature KW - Pavement subgrade KW - Tensile strength LA - English PB - Oklahoma. Department of Transportation PY - 1989-05-01 SN - FHWA/OK 89( 02) TI - Depressed Transverse Cracks in Asphalt Pavements in Oklahoma: Phase I M3 - Tech Report N1 - United States N1 - 2159 UR - https://rosap.ntl.bts.gov/view/dot/89304 ER -
Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 1]

Tyagi, Avdhesh K.

1988-09-01 | PDF

Hurricane Paine, extending across the Central Plains of the United States, caused flooding of unprecedented proportions in the Caney River. This storm produced a rainfall varying from 20 to 30 inches in Oklahoma during September 29 through October 4, 1986.

03/09/2026

Title : Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 1] Creator(s) : Tyagi, Avdhesh K. Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1988-09-01 Report Number : FHWA/OK 89(04) Vol. I URL : https://rosap.ntl.bts.gov/view/dot/89303 Tyagi, Avdhesh K. (1988). Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 1]. Tyagi, Avdhesh K. "Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 1]" (1988) Tyagi, Avdhesh K. "Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 1]" , 1988 Export RIS Citation Information. TY - Tech Report AU - Tyagi, Avdhesh K. A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Hurricane Paine, extending across the Central Plains of the United States, caused flooding of unprecedented proportions in the Caney River. This storm produced a rainfall varying from 20 to 30 inches in Oklahoma during September 29 through October 4, 1986. AN - dot:89303 ET - Interim Report: May 1987 - September 1988 KW - Bridges KW - Peak discharge KW - Flood plains KW - Hydraulics KW - WSPRO Model KW - Backwater effect LA - English PB - Oklahoma. Department of Transportation PY - 1988-09-01 SN - FHWA/OK 89(04) Vol. I TI - Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 1] M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89303 ER -
Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 2]

Tyagi, Avdhesh K.

1988-09-01 | PDF

Hurricane Paine, extending across the Central Plains of the United States, caused flooding of unprecedented proportions in the Caney River. This storm produced a rainfall varying from 20 to 30 inches in Oklahoma during September 29 through October 4, 1986.

03/09/2026

Title : Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 2] Creator(s) : Tyagi, Avdhesh K. Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1988-09-01 Report Number : FHWA/OK 89(04) Vol. II URL : https://rosap.ntl.bts.gov/view/dot/89302 Tyagi, Avdhesh K. (1988). Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 2]. Tyagi, Avdhesh K. "Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 2]" (1988) Tyagi, Avdhesh K. "Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 2]" , 1988 Export RIS Citation Information. TY - Tech Report AU - Tyagi, Avdhesh K. A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Hurricane Paine, extending across the Central Plains of the United States, caused flooding of unprecedented proportions in the Caney River. This storm produced a rainfall varying from 20 to 30 inches in Oklahoma during September 29 through October 4, 1986. AN - dot:89302 ET - Interim Report: May 1987 - September 1988 KW - Bridges KW - Peak discharge KW - Flood plains KW - Hydraulics KW - WSPRO Model KW - Backwater effect LA - English PB - Oklahoma. Department of Transportation PY - 1988-09-01 SN - FHWA/OK 89(04) Vol. II TI - Analysis of October 1986 Flood in Caney River at U.S. 75, Bartlesville, Oklahoma [Vol 2] M3 - Tech Report N1 - United States N1 - 2150 UR - https://rosap.ntl.bts.gov/view/dot/89302 ER -
Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation

Hostetter, Robert S. ;

Carter, R. G.

1993-11-01 | PDF

The objective was to determine the extent that transient visual adaptation (TVA) affects drivers' detection of targets along partially lighted freeway interchanges. The study expanded a preliminary task on TVA described in publication FHWA-RD-88-223. Twenty-five subjects drove 10 trials on an entrance and an exit ramp. Lighting was manipulated to p ...

03/09/2026

Title : Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation Creator(s) : Hostetter, Robert S.;Carter, R. G.;Dauber, G. W.; Corporate Creator(s) : IFR Applications, Inc. Corporate Contributor(s) : United States. Federal Highway Administration. Office of Safety and Traffic Operations R&D Contributor(s) : Arens, John B. Published Date : 1993-11-01 Report Number : FHWA-RD-91-041 URL : https://rosap.ntl.bts.gov/view/dot/89301 Hostetter, Robert S. et al. (1993). Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation. Hostetter, Robert S. and Carter, R. G. and Dauber, G. W. "Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation" (1993) Hostetter, Robert S. et al. "Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation" , 1993 Export RIS Citation Information. TY - Tech Report AU - Hostetter, Robert S. AU - Carter, R. G. AU - Dauber, G. W. A2 - IFR Applications, Inc. A3 - United States. Federal Highway Administration. Office of Safety and Traffic Operations R&D A4 - Arens, John B. A4 - Arens, John B. AB - The objective was to determine the extent that transient visual adaptation (TVA) affects drivers' detection of targets along partially lighted freeway interchanges. The study expanded a preliminary task on TVA described in publication FHWA-RD-88-223. Twenty-five subjects drove 10 trials on an entrance and an exit ramp. Lighting was manipulated to provide trials in darkness, and with one, two, three, and four luminaires lighted along each ramp. The same drivers returned for a second session of 10 trials, when refractors were replaced with sharp cut-off luminaires (low glare). The drivers pressed a button on a hand-held switch when they detected the 7-in. by 7-in. (17.8-cm by 17.8-cm) gray targets placed on the shoulder at 350 ft (106.75 m) or 475 ft (144.88 m) downstream of the final ramp luminaire. The vehicle computer recorded distances between subjects and targets at the instant of detection. AN - dot:89301 ET - Final Report KW - Street lighting KW - Raised road markings KW - Road markings KW - Field studies KW - Luminaires LA - English PB - United States. Federal Highway Administration. Office of Safety and Traffic Operations PY - 1993-11-01 SN - FHWA-RD-91-041 TI - Trade-Off Between Delineation and Lighting on Freeway Interchanges: Investigation of Transient Visual Adaptation M3 - Tech Report N1 - United States N1 - DTFH61-85-C-00137 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89301 ER -
Experimental Determination of the Ultimate Capacity of a Composite Prestressed Bridge Unit

Prasad, Rajendra ;

Wallace, Benjamin

1989-12-01 | PDF

A 55 ft. long prestressed, composite steel girder-concrete slab bridge unit was tested to ultimate load. The unit had previously undergone a series of tests including sustained loading, fatigue loading, and static loading to first yield. The 54 ft., simply supported span was subjected to static loads applied at points 20 ft. from the supports. Vert ...

03/09/2026

Title : Experimental Determination of the Ultimate Capacity of a Composite Prestressed Bridge Unit Creator(s) : Prasad, Rajendra;Wallace, Benjamin;Bush, Thomas D Jr; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1989-12-01 Report Number : Wallace, Benjamin URL : https://rosap.ntl.bts.gov/view/dot/89300 Prasad, Rajendra et al. (1989). Experimental Determination of the Ultimate Capacity of a Composite Prestressed Bridge Unit. Prasad, Rajendra and Wallace, Benjamin and Bush, Thomas D Jr "Experimental Determination of the Ultimate Capacity of a Composite Prestressed Bridge Unit" (1989) Prasad, Rajendra et al. "Experimental Determination of the Ultimate Capacity of a Composite Prestressed Bridge Unit" , 1989 Export RIS Citation Information. TY - Tech Report AU - Prasad, Rajendra AU - Wallace, Benjamin AU - Bush, Thomas D Jr A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - A 55 ft. long prestressed, composite steel girder-concrete slab bridge unit was tested to ultimate load. The unit had previously undergone a series of tests including sustained loading, fatigue loading, and static loading to first yield. The 54 ft., simply supported span was subjected to static loads applied at points 20 ft. from the supports. Vertical deflections were measured at the supports and midspan, and horizontal slippage at the slab-girder interface was measured at several locations along the span. Strain gage readings at midspan on the slab surface, slab longitudinal bars, and throughout the depth of the girders were recorded. The bridge unit behaved in a ductile manner, deflecting 18.6 in. before failure occurred. Strain gage readings indicated yielding occurred over nearly the full depth of the girders. Failure was by crushing of the slab at the load application points. The unit supported an applied load 13% greater than the ultimate load predicted using actual material properties. The excess capacity is attributed to strain hardening of the bottom flanges of the girders. Slippage at the slab-girder interface was observed to be small. Existing analysis procedures were found to be adequate for predicting the ultimate capacity of the unit. Load at first yield in a previous test was observed to be lower than predicted. It was determined that the reduction in yield load can be explained by the presence of residual tensile rolling stresses in the bottom flanges of the girders. AN - dot:89300 ET - Final Report KW - Breaking loads KW - Bridges KW - Composite structures KW - Deflection KW - Failure KW - Highway capacity KW - Load tests KW - Prefabricated structures KW - Prestressing KW - Static loads LA - English PB - Oklahoma. Department of Transportation PY - 1989-12-01 SN - Wallace, Benjamin TI - Experimental Determination of the Ultimate Capacity of a Composite Prestressed Bridge Unit M3 - Tech Report N1 - United States N1 - 2162 UR - https://rosap.ntl.bts.gov/view/dot/89300 ER -
Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies: Phase II (Complete Report)

Laguros, J. G. ;

Zaman, M. M.

1990-01-01 | PDF

To evaluate the causes of bridge approach settlement a survey of 758 bridge approaches in seventy-seven counties of Oklahoma was conducted. In this survey, data related to the following items were collected: (i) bridge, abutment, approach, and slope protection structure; (ii) embankment material. Information related to the construction and maintena ...

03/09/2026

Title : Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies: Phase II (Complete Report) Creator(s) : Laguros, J. G.;Zaman, M. M.;Mahmood, I U; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1990-01-01 Report Number : FHWA/OK 89 (06) URL : https://rosap.ntl.bts.gov/view/dot/89299 Laguros, J. G. et al. (1990). Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies: Phase II (Complete Report). Laguros, J. G. and Zaman, M. M. and Mahmood, I U "Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies: Phase II (Complete Report)" (1990) Laguros, J. G. et al. "Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies: Phase II (Complete Report)" , 1990 Export RIS Citation Information. TY - Tech Report AU - Laguros, J. G. AU - Zaman, M. M. AU - Mahmood, I U A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - To evaluate the causes of bridge approach settlement a survey of 758 bridge approaches in seventy-seven counties of Oklahoma was conducted. In this survey, data related to the following items were collected: (i) bridge, abutment, approach, and slope protection structure; (ii) embankment material. Information related to the construction and maintenance for these approaches was collected by interviewing Oklahoma Department of Transportation (ODOT) personnel and searching records maintained at ODOT. The analyses of data show that the settlement problem is extensive in Oklahoma, namely, 83% of the approaches surveyed experienced settlement. It was observed that on the basis of long term performance rigid and flexible approaches are similar, but on a short term basis, rigid approaches experience lower differential settlement. Pile supported abutments as compared to stub type and high embankments with no drainage for the fills appear to be conductive to larger settlements. In general, skewed approaches have a higher settlement than non-skewed approaches. Regression techniques were used to develop an empirical relationship between the approach settlement and the causative parameters such as age of the approach, embankment height, traffic volume, and skewness of the approach. As a preliminary work for the next phase of the study, soil samples were collected from two sites. Comprehensive laboratory testing was conducted on these samples with the purpose of determining their site-specific embankment and foundation soil characteristics which may be used in a settlement prediction model. AN - dot:89299 KW - Age KW - Bridge abutments KW - Bridge approaches KW - Data analysis KW - Data collection KW - Embankments KW - Field studies KW - Foundation soils KW - Soil stabilization LA - English PB - Oklahoma. Department of Transportation PY - 1990-01-01 SN - FHWA/OK 89 (06) TI - Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies: Phase II (Complete Report) M3 - Tech Report N1 - United States N1 - ODOT 86-04-2 Item 2148 UR - https://rosap.ntl.bts.gov/view/dot/89299 ER -
Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies; Phase II: Executive Summary

Laguros, J. G. ;

Zaman, M. M.

1990-01-01 | PDF

To evaluate the causes of bridge approach settlement a survey of 758 bridge approaches in seventy-seven counties of Oklahoma was conducted. In this survey, data related to the following items were collected: (i) bridge, abutment, approach, and slope protection structure; (ii) embankment material. Information related to the construction and maintena ...

03/09/2026

Title : Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies; Phase II: Executive Summary Creator(s) : Laguros, J. G.;Zaman, M. M.;Mahmood, I U; Corporate Creator(s) : University of Oklahoma, Norman Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1990-01-01 Report Number : FHWA/OK 89 (07), ORA 157-293 URL : https://rosap.ntl.bts.gov/view/dot/89298 Laguros, J. G. et al. (1990). Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies; Phase II: Executive Summary. Laguros, J. G. and Zaman, M. M. and Mahmood, I U "Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies; Phase II: Executive Summary" (1990) Laguros, J. G. et al. "Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies; Phase II: Executive Summary" , 1990 Export RIS Citation Information. TY - Tech Report AU - Laguros, J. G. AU - Zaman, M. M. AU - Mahmood, I U A2 - University of Oklahoma, Norman A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - To evaluate the causes of bridge approach settlement a survey of 758 bridge approaches in seventy-seven counties of Oklahoma was conducted. In this survey, data related to the following items were collected: (i) bridge, abutment, approach, and slope protection structure; (ii) embankment material. Information related to the construction and maintenance for these approaches was collected by interviewing Oklahoma Department of Transportation (ODOT) personnel and searching records maintained at ODOT. The analyses of data show that the settlement problem is extensive in Oklahoma, namely, 83% of the approaches surveyed experienced settlement. It was observed that on the basis of long term performance rigid and flexible approaches are similar, but on a short term basis, rigid approaches experience lower differential settlement. Pile supported abutments as compared to stub type and high embankments with no drainage for the fills appear to be conductive to larger settlements. In general, skewed approaches have a higher settlement than non-skewed approaches. Regression techniques were used to develop an empirical relationship between the approach settlement and the causative parameters such as age of the approach, embankment height, traffic volume, and skewness of the approach. As a preliminary work for the next phase of the study, soil samples were collected from two sites. Comprehensive laboratory testing was conducted on these samples with the purpose of determining their site-specific embankment and foundation soil characteristics which may be used in a settlement prediction model. AN - dot:89298 KW - Age KW - Bridge abutments KW - Bridge approaches KW - Data analysis KW - Data collection KW - Embankments KW - Field studies KW - Foundation soils KW - Soil stabilization LA - English PB - Oklahoma. Department of Transportation PY - 1990-01-01 SN - FHWA/OK 89 (07), ORA 157-293 TI - Evaluation of Causes of Excessive Settlements of Pavements Behind Bridge Abutments and Their Remedies; Phase II: Executive Summary M3 - Tech Report N1 - United States N1 - ODOT 86-04-2 It 2148 UR - https://rosap.ntl.bts.gov/view/dot/89298 ER -
Synthesis: Pavement Widening Best Practices [Project Summary Report]

Wilson, Bryan ;

Goehl, Darlene

2024-08-31 | PDF

The research team performed a literature review to determine the current state of the practice and emerging approaches on the following pavement widening topics: Pre-design pavement evaluation, sampling, and testing.• Pavement layer and cross-section design practices.• Material performance, availability, and selection practices.• Plans, specificati ...

03/09/2026

Title : Synthesis: Pavement Widening Best Practices [Project Summary Report] Creator(s) : Wilson, Bryan;Goehl, Darlene;Scullion, Tom; Corporate Creator(s) : Texas A&M Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-08-31 Report Number : 0-7188 URL : https://rosap.ntl.bts.gov/view/dot/89297 Wilson, Bryan et al. (2024). Synthesis: Pavement Widening Best Practices [Project Summary Report]. Wilson, Bryan and Goehl, Darlene and Scullion, Tom "Synthesis: Pavement Widening Best Practices [Project Summary Report]" (2024) Wilson, Bryan et al. "Synthesis: Pavement Widening Best Practices [Project Summary Report]" , 2024 Export RIS Citation Information. TY - Brief AU - Wilson, Bryan AU - Goehl, Darlene AU - Scullion, Tom A2 - Texas A&M Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - The research team performed a literature review to determine the current state of the practice and emerging approaches on the following pavement widening topics: Pre-design pavement evaluation, sampling, and testing.• Pavement layer and cross-section design practices.• Material performance, availability, and selection practices.• Plans, specifications, and estimates (PS&E) development.• Construction methods and sequencing. A survey of district personnel was performed to document experiences with pavement widening. Finally, four widening projects were evaluated: two narrow (less than 7 feet) and two Super 2 projects with one each in good and poor condition. AN - dot:89297 ET - Project Summary Report KW - Pavements KW - Pavement widening KW - Evaluation KW - Construction KW - Pavement design KW - Best practices KW - Two lane highways KW - Drainage KW - Failure KW - Literature reviews KW - Surveys LA - English PB - Texas A&M Transportation Institute PY - 2024-08-31 SN - 0-7188 TI - Synthesis: Pavement Widening Best Practices [Project Summary Report] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89297 ER -
Effectiveness of Riverbank Protection and River Control in Oklahoma

Harp, Jimmy F ;

Thomas, Mathew

1989-08-15 | PDF

Bank stabilization and protection from flood ravages have been a continuing problem in Oklahoma as well as in the surrounding states for a very long time. Bridges and hydraulic structures are situated at river sites where the river must become mature and conform to a desirable or controlled regime. In Oklahoma, several large rivers and streams flow ...

03/09/2026

Title : Effectiveness of Riverbank Protection and River Control in Oklahoma Creator(s) : Harp, Jimmy F;Thomas, Mathew; Corporate Creator(s) : University of Oklahoma. School of Civil Engineering and Environmental Science Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1989-08-15 Report Number : FHWA/OK 89(08) URL : https://rosap.ntl.bts.gov/view/dot/89296 Harp, Jimmy F and Thomas, Mathew (1989). Effectiveness of Riverbank Protection and River Control in Oklahoma. Harp, Jimmy F and Thomas, Mathew "Effectiveness of Riverbank Protection and River Control in Oklahoma" (1989) Harp, Jimmy F and Thomas, Mathew "Effectiveness of Riverbank Protection and River Control in Oklahoma" , 1989 Export RIS Citation Information. TY - Tech Report AU - Harp, Jimmy F AU - Thomas, Mathew A2 - University of Oklahoma. School of Civil Engineering and Environmental Science A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Bank stabilization and protection from flood ravages have been a continuing problem in Oklahoma as well as in the surrounding states for a very long time. Bridges and hydraulic structures are situated at river sites where the river must become mature and conform to a desirable or controlled regime. In Oklahoma, several large rivers and streams flow through the state. Primarily, two major systems exist in Oklahoma, the Red River and the Arkansas River systems and tributaries. AN - dot:89296 ET - Final Report 1988 to 1989 KW - Design KW - Floods KW - Hydrographic surveying KW - Overflows KW - Streambeds KW - Coast and river protective works KW - Vegetation LA - English PB - Oklahoma. Department of Transportation PY - 1989-08-15 SN - FHWA/OK 89(08) TI - Effectiveness of Riverbank Protection and River Control in Oklahoma M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89296 ER -
Best Practices for Pavement Widening

Wilson, Bryan ;

Goehl, Darlene

2026-02-01 | PDF

Premature pavement failures have occurred on several widening projects, including shoulder widenings, conversion of two-lane roadways to Super 2 sections, and other safety enhancements. Repairing these early failures is time-consuming, expensive, disrupts traffic, and poses safety hazards. Key contributing factors include poor-quality materials, po ...

03/09/2026

Title : Best Practices for Pavement Widening Creator(s) : Wilson, Bryan;Goehl, Darlene;Scullion, Tom;Sellards, Madeline; Corporate Creator(s) : Texas A&M Transportation Institute Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-02-01 Report Number : FHWA/TX-24/0-7188-R1 URL : https://rosap.ntl.bts.gov/view/dot/89295 Wilson, Bryan et al. (2026). Best Practices for Pavement Widening. Wilson, Bryan et al. "Best Practices for Pavement Widening" (2026) Wilson, Bryan et al. "Best Practices for Pavement Widening" , 2026 Export RIS Citation Information. TY - Tech Report AU - Wilson, Bryan AU - Goehl, Darlene AU - Scullion, Tom AU - Sellards, Madeline A2 - Texas A&M Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Premature pavement failures have occurred on several widening projects, including shoulder widenings, conversion of two-lane roadways to Super 2 sections, and other safety enhancements. Repairing these early failures is time-consuming, expensive, disrupts traffic, and poses safety hazards. Key contributing factors include poor-quality materials, poor joint construction, and inadequate drainage. These issues could have been avoided through proper pavement condition assessment, design, and construction practices, but detailed guidance on which methods to employ and which can be project specific is not readily available to district personnel. Therefore, there is a need to document and implement better widening practices across TxDOT. AN - dot:89295 ET - September 2023–August 2024 KW - Pavements KW - Pavement widening KW - Evaluation KW - Construction KW - Pavement design KW - Best practices KW - Two lane highways KW - Drainage KW - Failure KW - Literature reviews KW - Surveys LA - English PB - Texas A&M Transportation Institute PY - 2026-02-01 SN - FHWA/TX-24/0-7188-R1 TI - Best Practices for Pavement Widening M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89295 ER -
Scour Around Bridge Piers in Oklahoma Streams

Tyagi, Avdhesh K.

1989-04-01 | PDF

This study consisted of a hydrographic survey and determined maximum scour around the piers at eighteen selected bridges on the Cimarron, Arkansas, and Caney Rivers. The survey was performed soon after the 50- to 100-year-frequency flood in October, 1986. It was determined from the survey that maximum scour varied from 0.60 to 18 ft with depth of f ...

03/09/2026

Title : Scour Around Bridge Piers in Oklahoma Streams Creator(s) : Tyagi, Avdhesh K. Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1989-04-01 Report Number : FHWA/OK 89(09) URL : https://rosap.ntl.bts.gov/view/dot/89294 Tyagi, Avdhesh K. (1989). Scour Around Bridge Piers in Oklahoma Streams. Tyagi, Avdhesh K. "Scour Around Bridge Piers in Oklahoma Streams" (1989) Tyagi, Avdhesh K. "Scour Around Bridge Piers in Oklahoma Streams" , 1989 Export RIS Citation Information. TY - Tech Report AU - Tyagi, Avdhesh K. A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This study consisted of a hydrographic survey and determined maximum scour around the piers at eighteen selected bridges on the Cimarron, Arkansas, and Caney Rivers. The survey was performed soon after the 50- to 100-year-frequency flood in October, 1986. It was determined from the survey that maximum scour varied from 0.60 to 18 ft with depth of flow ranging between 0.75 to 25 ft. The October, 1986 flood of the Cimarron River resulted in severe scour around piers of eight overflow structures of the I-35 bridge. A major portion of the flood passed through these structures, resulting in a high velocity of flow. After the flood receded, the maximum depth of scour ranged from 10 to 30 ft. At U.S. 75 on the Caney River, a hydraulic analysis of water surface profiles using WSPRO program was determined for 50-, 100-year, and the 1986 flood because of the old bridge and new bridge. Because design criteria for scour depths at piers are based mostly on laboratory work and because some bridges designed according to these criteria have failed, it is recommended that this study be extended to collect field data on the maximum scour at selected bridges over a four-year period. Field data will be collected four times a year for various high and low flow conditions. Laboratory and field data are to be analyzed and used to produce design criteria so that damages to bridge piers are minimized. Further laboratory and field data will be generated for different river-bed soils (sand, silt and clay) and for varying hydraulic conditions. AN - dot:89294 ET - Final Summary Report KW - Bridge piers KW - Bridges KW - Clay KW - Design KW - Floods KW - Hydrographic surveying KW - Overflows KW - Sand KW - Scour KW - Silts KW - Streambeds LA - English PB - Oklahoma. Department of Transportation PY - 1989-04-01 SN - FHWA/OK 89(09) TI - Scour Around Bridge Piers in Oklahoma Streams M3 - Tech Report N1 - United States N1 - 2150 UR - https://rosap.ntl.bts.gov/view/dot/89294 ER -
Fatigue Damage to Steel Bridge Diaphragms

Zwerneman, Farrel J. ;

West, Adam B

1989-12-01 | PDF

The cause of diaphragm cracking on an interstate highway bridge was investigated. The investigation consisted of load-testing the bridge, performing a computer-aided analysis of the bridge superstructure and specific components, measuring the chemical and physical properties of the diaphragm steel, and performing fatigue tests on simulated diaphrag ...

03/09/2026

Title : Fatigue Damage to Steel Bridge Diaphragms Creator(s) : Zwerneman, Farrel J.;West, Adam B;Lim, Kee Seong; Corporate Creator(s) : Oklahoma State University. School of Civil Engineering Corporate Contributor(s) : Oklahoma. Department of Transportation. Research & Development Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 1989-12-01 Report Number : FHWA/OK 89(10) URL : https://rosap.ntl.bts.gov/view/dot/89293 Zwerneman, Farrel J. et al. (1989). Fatigue Damage to Steel Bridge Diaphragms. Zwerneman, Farrel J. and West, Adam B and Lim, Kee Seong "Fatigue Damage to Steel Bridge Diaphragms" (1989) Zwerneman, Farrel J. et al. "Fatigue Damage to Steel Bridge Diaphragms" , 1989 Export RIS Citation Information. TY - Tech Report AU - Zwerneman, Farrel J. AU - West, Adam B AU - Lim, Kee Seong A2 - Oklahoma State University. School of Civil Engineering A3 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - The cause of diaphragm cracking on an interstate highway bridge was investigated. The investigation consisted of load-testing the bridge, performing a computer-aided analysis of the bridge superstructure and specific components, measuring the chemical and physical properties of the diaphragm steel, and performing fatigue tests on simulated diaphragms. It was determined that the high degree of restraint at the diaphragm-to-girder connection causes individual diaphragms at each transverse location to act as continuous members reaching from one side of the bridge to the other. Differential deflections of longitudinal members induce moments in the diaphragms, resulting in tensile stresses along the bottom of the diaphragms. These tensile stresses are amplified by the presence of a bottom-flange cope at the diaphragm-to-girder connections. High tensile stresses lead to initiation of fatigue cracks in diaphragms at copes. A number of repair techniques were tested. These include attaching an auxiliary flange, smoothing out the cope, reducing restraint in the connection by removing bolts from the connection, and replacing coped diaphragms with un-coped diaphragms. The technique of removing bolts from the connection is recommended for implementation since it is by far the simplest to perform and is effective in extending fatigue life. AN - dot:89293 ET - Final Report: 4/1/87-12/31/89 KW - Bolts KW - Bridge superstructures KW - Engineering moments KW - Fatigue tests KW - Fracture mechanics KW - Highway bridges KW - Load tests KW - Flanges LA - English PB - Oklahoma. Department of Transportation PY - 1989-12-01 SN - FHWA/OK 89(10) TI - Fatigue Damage to Steel Bridge Diaphragms M3 - Tech Report N1 - United States N1 - 2156 UR - https://rosap.ntl.bts.gov/view/dot/89293 ER -
Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1990]

Williams, Gary G.

1990-01-01 | PDF

This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the ...

03/09/2026

Title : Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1990] Creator(s) : Williams, Gary G. Corporate Creator(s) : Oklahoma. Department of Transportation. Research & Development Division Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 1990-01-01 Report Number : FHWA/OK 90(01) URL : https://rosap.ntl.bts.gov/view/dot/89292 Williams, Gary G. (1990). Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1990]. Williams, Gary G. "Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1990]" (1990) Williams, Gary G. "Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1990]" , 1990 Export RIS Citation Information. TY - Tech Report AU - Williams, Gary G. A2 - Oklahoma. Department of Transportation. Research & Development Division A3 - United States. Department of Transportation. Federal Highway Administration AB - This publication consists of a listing of experimental products and equipment that are being considered or evaluated by the Oklahoma Department of Transportation, other transportation departments, or other agencies. The listing is continuously updated as new information is received. A status of the evaluation is indicated for each item, showing the progress or result of the evaluation. AN - dot:89292 ET - Jan., 1989 to Jan., 1990 KW - Adhesives KW - Admixtures KW - Annual reports KW - Bituminous materials KW - Construction equipment KW - Culverts KW - Deicing chemicals KW - Equipment KW - Fabrics KW - Herbicides KW - Highway maintenance KW - Joint fillers KW - Joint sealers KW - Testing equipment LA - English PB - Oklahoma. Department of Transportation PY - 1990-01-01 SN - FHWA/OK 90(01) TI - Experimental Products and Equipment for Highway Construction and Maintenance: Annual Report [1990] M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89292 ER -

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