Recent Additions

This page includes the documents that were newly added to the repository within the last 30 days.

All these words:

This exact word or phrase:

Any of these words:

None of these words:

Language:

Publication Date Range:

Visit our Help Page for additional assistance

Select a Range:

Select a Format:

Custom Search Builder:

Custom Search Box

Visit our Help Page for additional assistance

Showing 81 - 100 of 427 results

Thermo-Mechanical Behavior of 410 Stainless Steel Over a Wide Range of Strain Rates, Temperatures, and Loading Conditions

Ho, Chong-Wei

2026-08-01 | PDF

This research investigates the thermomechanical behavior of 410 stainless steel under tension, compression, and torsion across a wide strain rate range from 10-4 s-1 to 5000 s-1. The material reveals identical yielding stresses across all loading modes, however, the material exhibits more pronounced hardening under tensile loading, followed by comp ...

08/24/2026

Title : Thermo-Mechanical Behavior of 410 Stainless Steel Over a Wide Range of Strain Rates, Temperatures, and Loading Conditions Creator(s) : Ho, Chong-Wei Corporate Creator(s) : Ohio State University. Dynamic Mechanics of Materials Laboratory (DMML) Corporate Contributor(s) : United States. Federal Aviation Administration. Aircraft Certification Service Policy and Innovation Division Published Date : 2026-08-01 Report Number : DOT/FAA/TCTT-26/29 DOI : https://doi.org/10.21949/m49s-ta70
Ho, Chong-Wei (2026). Thermo-Mechanical Behavior of 410 Stainless Steel Over a Wide Range of Strain Rates, Temperatures, and Loading Conditions. https://doi.org/10.21949/m49s-ta70

Ho, Chong-Wei "Thermo-Mechanical Behavior of 410 Stainless Steel Over a Wide Range of Strain Rates, Temperatures, and Loading Conditions" (2026), https://doi.org/10.21949/m49s-ta70

Ho, Chong-Wei "Thermo-Mechanical Behavior of 410 Stainless Steel Over a Wide Range of Strain Rates, Temperatures, and Loading Conditions" , 2026, https://doi.org/10.21949/m49s-ta70
Export RIS Citation Information. TY - Tech Report AU - Ho, Chong-Wei A2 - Ohio State University. Dynamic Mechanics of Materials Laboratory (DMML) A3 - United States. Federal Aviation Administration. Aircraft Certification Service Policy and Innovation Division A4 - Cordasco, Daniel AB - This research investigates the thermomechanical behavior of 410 stainless steel under tension, compression, and torsion across a wide strain rate range from 10-4 s-1 to 5000 s-1. The material reveals identical yielding stresses across all loading modes, however, the material exhibits more pronounced hardening under tensile loading, followed by compression, with minimal hardening observed under torsion. The compressive loading analysis accounted for physical barreling by utilizing analytical methods and reverse engineering to correct the flow stress for frictional effects. Anisotropy testing shows Lankford coefficients close to 1.0 in tension. AN - dot:93067 DO - https://doi.org/10.21949/m49s-ta70 ET - Final Report KW - Stainless steel KW - Plasticity KW - Flow KW - Strain measurement KW - Temperature KW - Digital simulation KW - Infrared detectors KW - Taylor-Quinney KW - Johnson-Cook KW - Hopkinson bar LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2026-08-01 SN - DOT/FAA/TCTT-26/29 TI - Thermo-Mechanical Behavior of 410 Stainless Steel Over a Wide Range of Strain Rates, Temperatures, and Loading Conditions M3 - Tech Report N1 - United States N1 - 692M152340003 UR - https://rosap.ntl.bts.gov/view/dot/93067 ER - DB - ROSA P
Study on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25

Kiousis, Panos D. ;

Whitcomb, Brent L.

2007-04-01 | PDF

Self-consolidating concrete (SCC) is a stable and highly flowable concrete that consolidates without the help of external vibration and can flow through heavy reinforcement and around corners in complex formwork under its own weight. The exceptional performance of this remarkable material has attracted the attention of construction firms and DOTs i ...

08/24/2026

Title : Study on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25 Creator(s) : Kiousis, Panos D.;Whitcomb, Brent L.; Corporate Creator(s) : Colorado School of Mines Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-04-01 Report Number : CDOT-2007-1 URL : https://rosap.ntl.bts.gov/view/dot/93066
Kiousis, Panos D. and Whitcomb, Brent L. (2007). Study on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25.

Kiousis, Panos D. and Whitcomb, Brent L. "Study on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25" (2007)

Kiousis, Panos D. and Whitcomb, Brent L. "Study on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25" , 2007
Export RIS Citation Information. TY - Tech Report AU - Kiousis, Panos D. AU - Whitcomb, Brent L. A2 - Colorado School of Mines A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - Self-consolidating concrete (SCC) is a stable and highly flowable concrete that consolidates without the help of external vibration and can flow through heavy reinforcement and around corners in complex formwork under its own weight. The exceptional performance of this remarkable material has attracted the attention of construction firms and DOTs in the United States interested in using SCC on new bridge construction and bridge repair projects. CSM has been granted a CDOT research project to participate in two SCC demonstration projects in the state of Colorado. The first project is part of the construction of structures P-18-BK and P-18-BM on I25 in Trinidad, CO. The second project is the repair of abutment supports of structures D-17-DA and DB on I-25 in Mead, CO. This report presents the study and recommendations for the repairs in Mead. The Mead project addresses the problem of locking the ends of a non-composite steel-girder bridge to its abutments. AN - dot:93066 ET - Interim KW - Girders KW - Traffic loads KW - Trucks KW - Mix design KW - Mechanical stability KW - Slump test KW - Strength of materials KW - Bridge performance KW - Jointless bridges KW - Stability analysis KW - Bridge construction KW - SCC KW - slump flow KW - bond strength KW - traffic vibrations LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-04-01 SN - CDOT-2007-1 TI - Study on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25 M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93066 ER - DB - ROSA P
Statewide Economic Benefits of Transportation Investment

Pickton, Todd ;

Clements, Janet

2007-04-01 | PDF

This study evaluates the statewide economic benefits of future transportation investment in Colorado using available data and benefits studies conducted in other states. Objectives of this study are to provide Colorado stakeholders results consistent with their guidance in the CDOT Economic Benefits of Transportation Research Scoping Study (May 200 ...

08/24/2026

Title : Statewide Economic Benefits of Transportation Investment Creator(s) : Pickton, Todd;Clements, Janet;Felsburg, Robert W.; Corporate Creator(s) : BBC Research & Consulting;Felsburg Holt & Ullevig; Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-04-01 Report Number : CDOT-2007-5 URL : https://rosap.ntl.bts.gov/view/dot/93065
Pickton, Todd et al. (2007). Statewide Economic Benefits of Transportation Investment.

Pickton, Todd and Clements, Janet and Felsburg, Robert W. "Statewide Economic Benefits of Transportation Investment" (2007)

Pickton, Todd et al. "Statewide Economic Benefits of Transportation Investment" , 2007
Export RIS Citation Information. TY - Tech Report AU - Pickton, Todd AU - Clements, Janet AU - Felsburg, Robert W. A2 - BBC Research & Consulting A2 - Felsburg Holt & Ullevig A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - This study evaluates the statewide economic benefits of future transportation investment in Colorado using available data and benefits studies conducted in other states. Objectives of this study are to provide Colorado stakeholders results consistent with their guidance in the CDOT Economic Benefits of Transportation Research Scoping Study (May 2006) and to identify data needs and other information necessary to perform a future in-depth analysis of benefits by region within the state. This research focuses on the benefits of additional transportation spending above a baseline investment scenario. The scenarios chosen for evaluation represent different levels of investment identified in CDOT's 2030 Statewide Transportation Plan (2030 Plan). The baseline or "Forecast Revenue" investment scenario represents current revenue projections through 2030. The alternative "Sustain Current Performance" scenario represents an additional investment of $48 billion. This is the level of investment necessary to maintain current transportation system performance levels. AN - dot:93065 ET - Final Report KW - Economic benefits KW - Transportation planning KW - Investments KW - Pavement management systems KW - Travel time KW - Financing KW - Evaluation KW - Data collection KW - transportation investment LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-04-01 SN - CDOT-2007-5 TI - Statewide Economic Benefits of Transportation Investment M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93065 ER - DB - ROSA P
Factors Impacting the Health of Roadside Vegetation

Trahan, Nicole A. ;

Peterson, Curt M.

2007-04-01 | PDF

This study provides an ecological impact assessment of factors affecting the health of roadside vegetation in the state of Colorado including potential biotic and abiotic plant stressors and deicer applications. Across eight field sites, an evaluation was completed for foliar injury, physiology by leaf-level gas exchange, salt exposure, long-term d ...

08/24/2026

Title : Factors Impacting the Health of Roadside Vegetation Creator(s) : Trahan, Nicole A.;Peterson, Curt M.; Corporate Creator(s) : University of Northern Colorado, Psychology Department Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-04-01 Report Number : CDOT-DTD-2005-12 URL : https://rosap.ntl.bts.gov/view/dot/93064
Trahan, Nicole A. and Peterson, Curt M. (2007). Factors Impacting the Health of Roadside Vegetation.

Trahan, Nicole A. and Peterson, Curt M. "Factors Impacting the Health of Roadside Vegetation" (2007)

Trahan, Nicole A. and Peterson, Curt M. "Factors Impacting the Health of Roadside Vegetation" , 2007
Export RIS Citation Information. TY - Tech Report AU - Trahan, Nicole A. AU - Peterson, Curt M. A2 - University of Northern Colorado, Psychology Department A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - This study provides an ecological impact assessment of factors affecting the health of roadside vegetation in the state of Colorado including potential biotic and abiotic plant stressors and deicer applications. Across eight field sites, an evaluation was completed for foliar injury, physiology by leaf-level gas exchange, salt exposure, long-term drought stress, nutrient availability, pollutant exposure, disease, and insect damage in roadside lodgepole (Pinus contorta) and ponderosa (Pinus ponderosa) pines. These measures were compared with conifers away from the roadside environment in the same location in the winter/spring and summer/ fall of 2004.Additionally, a controlled assessment of the impacts of sand/salt and magnesium chloride deicers on foliar injury and leaf-level gas exchange in saplings of P. ponderosa and P. contorta was performed. Seed germination and viability in response to various commercial deicers was also evaluated in native Colorado plant species. Generally, roadside conifers exhibited significant foliar injury and needle loss compared to their off road counterparts, while roadside plant tissues and soils exhibited elevated levels of sodium, magnesium, and chloride. Injury to the tree crown correlated most strongly with levels of chlorides in older needle foliage(R2 = 0.696, p < 0.0001). A significant depression of leaf-level photosynthesis rates was observed in roadside trees during the winter deicing season but not during the subsequent growing season. Roadside and off-road trees did not evince any difference in long-term drought stress as demonstrated by pre-dawn leaf tissue water potentials. AN - dot:93064 ET - Final Report KW - Deicing chemicals KW - Sodium chloride KW - Magnesium chloride KW - Air pollution KW - Drought KW - Heavy metals KW - Plants KW - Pathology KW - foliar injury KW - leaf-level gas exchange KW - plant nutrition KW - seed germination KW - seed viability KW - drought stress KW - conifer pathology KW - Pinus ponderosa KW - Pinus contorta LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-04-01 SN - CDOT-DTD-2005-12 TI - Factors Impacting the Health of Roadside Vegetation M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93064 ER - DB - ROSA P
Forensic Investigation of Pavement Failure on Vasquez Boulevard

Acimovic, Benjamin ;

Rajasekar, Leela

2007-05-01 | PDF

Vasquez Boulevard between mileposts 291 and 297 in Commerce City was originally constructed in the 1940s with asphalt that didn't contain an anti-stripping agent. It is now part of US Highway 6 and has been designated as an over-weight and over-height relief route for the I-25 corridor. The boulevard has become a main trucking route for a heavily i ...

08/24/2026

Title : Forensic Investigation of Pavement Failure on Vasquez Boulevard Creator(s) : Acimovic, Benjamin;Rajasekar, Leela;Akhavan, Reza; Corporate Creator(s) : Colorado Department of Transportation - Region 6 Materials Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-05-01 Report Number : CDOT-2007-7 URL : https://rosap.ntl.bts.gov/view/dot/93063
Acimovic, Benjamin et al. (2007). Forensic Investigation of Pavement Failure on Vasquez Boulevard.

Acimovic, Benjamin and Rajasekar, Leela and Akhavan, Reza "Forensic Investigation of Pavement Failure on Vasquez Boulevard" (2007)

Acimovic, Benjamin et al. "Forensic Investigation of Pavement Failure on Vasquez Boulevard" , 2007
Export RIS Citation Information. TY - Tech Report AU - Acimovic, Benjamin AU - Rajasekar, Leela AU - Akhavan, Reza A2 - Colorado Department of Transportation - Region 6 Materials A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - Vasquez Boulevard between mileposts 291 and 297 in Commerce City was originally constructed in the 1940s with asphalt that didn't contain an anti-stripping agent. It is now part of US Highway 6 and has been designated as an over-weight and over-height relief route for the I-25 corridor. The boulevard has become a main trucking route for a heavily industrialized area. There was a major rehabilitation project in 2001 on this stretch of road with 2" milling and 2" stone matrix asphalt (SMA) paving. Parts of this pavement started rutting less than a year after construction. An investigation of the pavement failure determined that the causes were excessive and repeated loading of over-weight and over-height trucks; exposure of milled surface that didn't contain an anti-stripping agent to traffic and weather; inexperience with SMA paving materials, testing, and construction; and highly variable mix gradation and AC content quality levels. Recommendations for future SMA projects include training personnel to understand the complexities of SMA; establishing rigorous methods of calculating ESALs; adding fibers to reduce drain down and increase film thickness; using material transfer vehicles to minimize segregation and improve smoothness; and specifying the Superpave Gyratory Compactor for design and verification testing. AN - dot:93063 ET - Final Report KW - Rutting KW - Stone matrix asphalt KW - Pavement design KW - Equivalent single axle loads KW - Pavement stripping KW - Superpave KW - Weather KW - Vehicle size KW - anti-stripping agents LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-05-01 SN - CDOT-2007-7 TI - Forensic Investigation of Pavement Failure on Vasquez Boulevard M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93063 ER - DB - ROSA P
Analysis of Bicycle-Related and Pedestrian-Related Roadway Crashes

Gill, Michael P.

2007-06-01 | PDF

The premise of this study is that crashes involving bicyclists and pedestrians are similar in characteristics, including type and cause. Using available data and existing analysis tools, the study conducted a corridor-specific approach along state highways within local and/or county jurisdictional boundaries to identify potential trends based on pa ...

08/24/2026

Title : Analysis of Bicycle-Related and Pedestrian-Related Roadway Crashes Creator(s) : Gill, Michael P. Corporate Creator(s) : Carter-Burgess Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-06-01 Report Number : CDOT-2007-11 URL : https://rosap.ntl.bts.gov/view/dot/93062
Gill, Michael P. (2007). Analysis of Bicycle-Related and Pedestrian-Related Roadway Crashes.

Gill, Michael P. "Analysis of Bicycle-Related and Pedestrian-Related Roadway Crashes" (2007)

Gill, Michael P. "Analysis of Bicycle-Related and Pedestrian-Related Roadway Crashes" , 2007
Export RIS Citation Information. TY - Tech Report AU - Gill, Michael P. A2 - Carter-Burgess A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - The premise of this study is that crashes involving bicyclists and pedestrians are similar in characteristics, including type and cause. Using available data and existing analysis tools, the study conducted a corridor-specific approach along state highways within local and/or county jurisdictional boundaries to identify potential trends based on patterns in crash types and causes. For instance, do the majority of pedestrian crashes along a corridor occur at mid-block locations; at or near intersections that involve a pedestrian hit by a turning vehicle; or involve a pedestrian hit from behind while walking with traffic along a roadway shoulder (paved or unpaved) and not on a sidewalk? Do most bicycle crashes involve a motorist overtaking a bicyclist, a motorist turning or merging into the path of a bicyclist, or a bicyclist turning or merging into the path of a motorist? By identifying common causal factors of bicycle and pedestrian crashes, this study should help planning and design efforts to provide safer intersections and corridors for use by pedestrians and bicyclists. The study developed recommendations to improve statewide, county and local data recording of bicycle and pedestrian crash factors. AN - dot:93062 ET - Final Report KW - Pedestrian safety KW - Bicycle safety KW - Bicycle facilities KW - Crosswalks KW - Intersections KW - Crashes KW - Data analysis LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-06-01 SN - CDOT-2007-11 TI - Analysis of Bicycle-Related and Pedestrian-Related Roadway Crashes M3 - Tech Report N1 - United States N1 - 97.30 UR - https://rosap.ntl.bts.gov/view/dot/93062 ER - DB - ROSA P
Aircraft Material Fire Test Handbook

Boeing Commercial Airplane

1990-09-01 | PDF

In order to assure prescribed levels of fire safety in civil aircraft, the Federal Aviation Administration (FAA) requires that a variety of fire test methods be used to demonstrate that aircraft materials meet specified performance criteria when exposed to heat or flame. In principle, the specific test method required serves as a surrogate for the ...

08/24/2026

Title : Aircraft Material Fire Test Handbook Corporate Creator(s) : Boeing Commercial Airplane Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1990-09-01 Report Number : DOT/FAA/CT-89/15 URL : https://rosap.ntl.bts.gov/view/dot/93061
Boeing Commercial Airplane (1990). Aircraft Material Fire Test Handbook.

Boeing Commercial Airplane "Aircraft Material Fire Test Handbook" (1990)

Boeing Commercial Airplane "Aircraft Material Fire Test Handbook" , 1990
Export RIS Citation Information. TY - Tech Report A2 - Boeing Commercial Airplane A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center A4 - Sarkos, Constantine P AB - In order to assure prescribed levels of fire safety in civil aircraft, the Federal Aviation Administration (FAA) requires that a variety of fire test methods be used to demonstrate that aircraft materials meet specified performance criteria when exposed to heat or flame. In principle, the specific test method required serves as a surrogate for the fire environment to which a given material could potentially be exposed, and the test criteria relate to the performance of the material in this fire environment. AN - dot:93061 ET - Final Report KW - Fires KW - Aircraft cabins KW - Airplanes KW - Handbooks KW - Manuals KW - Materials KW - Testing KW - Flammability KW - Smoke LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1990-09-01 SN - DOT/FAA/CT-89/15 TI - Aircraft Material Fire Test Handbook M3 - Tech Report N1 - United States N1 - DTFA03-87-C-00053 UR - https://rosap.ntl.bts.gov/view/dot/93061 ER - DB - ROSA P
Current Cost-Benefit Evaluation of Short-Term Warranties for Hot Mix Asphalt Pavements

Aschenbrener, Timothy B. ;

Goldbaum, Jay E.

2007-06-01 | PDF

The purpose of this report is to provide the reader with the current cost-benefit evaluation of hot mix asphalt (HMA) projects constructed using the 3 and 5-year warranty specifications developed by CDOT. There were eight projects evaluated using the 3-year warranty specifications and two projects evaluated using the 5-year warranty specifications. ...

08/24/2026

Title : Current Cost-Benefit Evaluation of Short-Term Warranties for Hot Mix Asphalt Pavements Creator(s) : Aschenbrener, Timothy B.;Goldbaum, Jay E.; Corporate Creator(s) : Colorado. Dept. of Transportation. Materials and Geotechnical Branch Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-06-01 Report Number : CDOT-2007-10 URL : https://rosap.ntl.bts.gov/view/dot/93060
Aschenbrener, Timothy B. and Goldbaum, Jay E. (2007). Current Cost-Benefit Evaluation of Short-Term Warranties for Hot Mix Asphalt Pavements.

Aschenbrener, Timothy B. and Goldbaum, Jay E. "Current Cost-Benefit Evaluation of Short-Term Warranties for Hot Mix Asphalt Pavements" (2007)

Aschenbrener, Timothy B. and Goldbaum, Jay E. "Current Cost-Benefit Evaluation of Short-Term Warranties for Hot Mix Asphalt Pavements" , 2007
Export RIS Citation Information. TY - Tech Report AU - Aschenbrener, Timothy B. AU - Goldbaum, Jay E. A2 - Colorado. Dept. of Transportation. Materials and Geotechnical Branch A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - The purpose of this report is to provide the reader with the current cost-benefit evaluation of hot mix asphalt (HMA) projects constructed using the 3 and 5-year warranty specifications developed by CDOT. There were eight projects evaluated using the 3-year warranty specifications and two projects evaluated using the 5-year warranty specifications. Each warranty project was evaluated with a comparable non-warranty (control) project. Overall, 214.6 lane-miles of warranty projects were constructed and compared to 276.6 lane-miles of control projects. AN - dot:93060 ET - Final Report KW - Benefit cost analysis KW - Pavement performance KW - Warranty KW - Specifications KW - Hot mix asphalt KW - Analysis KW - Data KW - Construction KW - Contractors KW - international ride index (IRI) LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-06-01 SN - CDOT-2007-10 TI - Current Cost-Benefit Evaluation of Short-Term Warranties for Hot Mix Asphalt Pavements M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93060 ER - DB - ROSA P
Effectiveness of Ledges in Culverts for Small Mammal Passage

Meaney, Carron A. ;

Bakeman, Mark

2007-06-01 | PDF

Ledges were installed in six culverts in Boulder County, Colorado, to test their ability to facilitate small mammal movement under roads and to determine whether Preble's meadow jumping mice (Zapus hudsonius preblei) would use such ledges. Ledge use was measured by recording photographs of mammals on the ledge with motion-detecting cameras. Ledges ...

08/24/2026

Title : Effectiveness of Ledges in Culverts for Small Mammal Passage Creator(s) : Meaney, Carron A.;Bakeman, Mark;Reed-Eckert, Melissa;Wostl, Eli; Corporate Creator(s) : Meaney & Company;Walsh Environmental Scientists and Engineers;Ensight Technical Services, Incorporated;Bear Canyon Consulting, LLC;University of Colorado at Denver; Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration; Published Date : 2007-06-01 Report Number : CDOT-2007-9 URL : https://rosap.ntl.bts.gov/view/dot/93059
Meaney, Carron A. et al. (2007). Effectiveness of Ledges in Culverts for Small Mammal Passage.

Meaney, Carron A. et al. "Effectiveness of Ledges in Culverts for Small Mammal Passage" (2007)

Meaney, Carron A. et al. "Effectiveness of Ledges in Culverts for Small Mammal Passage" , 2007
Export RIS Citation Information. TY - Tech Report AU - Meaney, Carron A. AU - Bakeman, Mark AU - Reed-Eckert, Melissa AU - Wostl, Eli A2 - Meaney & Company A2 - Walsh Environmental Scientists and Engineers A2 - Ensight Technical Services, Incorporated A2 - Bear Canyon Consulting, LLC A2 - University of Colorado at Denver A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration AB - Ledges were installed in six culverts in Boulder County, Colorado, to test their ability to facilitate small mammal movement under roads and to determine whether Preble's meadow jumping mice (Zapus hudsonius preblei) would use such ledges. Ledge use was measured by recording photographs of mammals on the ledge with motion-detecting cameras. Ledges connected to the streambank with removable ramps, which served as a proxy for rendering the ledges accessible in order to test whether there was more usage when the ramps were on (ledges accessible) than when they were off (ledges inaccessible). Nine mammal species were captured using the ledges in 705 photographs during the study spanning two summers, 2005 and 2006. Preble's meadow jumping mouse was photographed on the ledge only once during the pilot and three times during the active study. There were 443 photographs of mammals on the ledge with ramps on and 262 photographs with ramps off. Significant differences were found among the six culverts and between ramp conditions. The ledges appear to present desirable passageways even with the ramps off, to the extent that small mammals will climb up concrete walls to access them. Culvert dimensions and vegetative cover did not show statistical correlations with the number of photographs, possibly because of the small number of culverts. AN - dot:93059 ET - Final Report KW - Ramps KW - Traffic mitigation KW - Habitat KW - Culverts KW - Mammals KW - Wildlife crossings KW - Bridges KW - Corridors KW - Rodents KW - Cameras KW - habitat fragmentation KW - ecoculverts, Preble's meadow jumping mouse LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-06-01 SN - CDOT-2007-9 TI - Effectiveness of Ledges in Culverts for Small Mammal Passage M3 - Tech Report N1 - United States N1 - 32.41 UR - https://rosap.ntl.bts.gov/view/dot/93059 ER - DB - ROSA P
Step Up Phase II Statewide Implementation Report

MacDonald, Tracey ;

Erker, Matt

2007-09-01 | PDF

Strategic Transportation, Environmental and Planning Process for Urbanizing Places, or STEP UP, is an environmental streamlining pilot project involving the Colorado Department of Transportation (CDOT), the Federal Highway Administration (FHWA), the Environmental Protection Agency (EPA) and the North Front Range Metropolitan Planning Organization ( ...

08/24/2026

Title : Step Up Phase II Statewide Implementation Report Creator(s) : MacDonald, Tracey;Erker, Matt; Corporate Creator(s) : Carter & Burgess, Inc. Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch;United States. Department of Transportation. Federal Highway Administration;North Front Range Metropolitan Planning Organization; Published Date : 2007-09-01 Report Number : CDOT-2007-13 URL : https://rosap.ntl.bts.gov/view/dot/93058
MacDonald, Tracey and Erker, Matt (2007). Step Up Phase II Statewide Implementation Report.

MacDonald, Tracey and Erker, Matt "Step Up Phase II Statewide Implementation Report" (2007)

MacDonald, Tracey and Erker, Matt "Step Up Phase II Statewide Implementation Report" , 2007
Export RIS Citation Information. TY - Tech Report AU - MacDonald, Tracey AU - Erker, Matt A2 - Carter & Burgess, Inc. A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch A3 - United States. Department of Transportation. Federal Highway Administration A3 - North Front Range Metropolitan Planning Organization AB - Strategic Transportation, Environmental and Planning Process for Urbanizing Places, or STEP UP, is an environmental streamlining pilot project involving the Colorado Department of Transportation (CDOT), the Federal Highway Administration (FHWA), the Environmental Protection Agency (EPA) and the North Front Range Metropolitan Planning Organization (NFRMPO). The primary objectives of the project are 1) development of an improved process for addressing environmental impacts related to transportation projects at the earliest possible stage, 2) development of GIS-based tools for early identification of impacts of transportation projects, 3) incorporation of a cumulative effects assessment into NFRMPO's Regional Transportation Plan process to help understand the effects of transportation development on both land use and environmental resources. This report discusses the recommended steps and costs for implementing STEP UP across Colorado. AN - dot:93058 ET - Final Report KW - Environmental streamlining KW - Assessments KW - Transportation planning KW - Geographic information systems KW - Plan implementation KW - Environmental policy KW - Land use KW - environmental streamlining KW - cumulative effects assessment LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2007-09-01 SN - CDOT-2007-13 TI - Step Up Phase II Statewide Implementation Report M3 - Tech Report N1 - United States N1 - PG-014HQ268 UR - https://rosap.ntl.bts.gov/view/dot/93058 ER - DB - ROSA P
Refined Design Methods for Lean-On Bracing [Project Summary Report]

Helwig, Todd ;

Gasser, Claire

2024-01-31 | PDF

The researchers carried out parametric finite element analyses (FEA) and field monitoring to develop improved guidelines for the widespread use of lean-on bracing applications in Texas bridges. Researchers instrumented and tested two existing bridges with lean-on bracing. Strain and displacement measurements from the completed bridges and existing ...

08/24/2026

Title : Refined Design Methods for Lean-On Bracing [Project Summary Report] Creator(s) : Helwig, Todd;Gasser, Claire;Bjelland, Aiden;Fish, David;Yarnold, Matthew;Hurlebaus, Stefan;Engelhardt, Michael;Hebdon, Matthew;Williamson, Eric;Park, Sunghyun;Patel, Shrey; Corporate Creator(s) : University of Texas at Austin. Center for Transportation Research Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-01-31 Report Number : 0-7093: URL : https://rosap.ntl.bts.gov/view/dot/93057
Helwig, Todd et al. (2024). Refined Design Methods for Lean-On Bracing [Project Summary Report].

Helwig, Todd et al. "Refined Design Methods for Lean-On Bracing [Project Summary Report]" (2024)

Helwig, Todd et al. "Refined Design Methods for Lean-On Bracing [Project Summary Report]" , 2024
Export RIS Citation Information. TY - Brief AU - Helwig, Todd AU - Gasser, Claire AU - Bjelland, Aiden AU - Fish, David AU - Yarnold, Matthew AU - Hurlebaus, Stefan AU - Engelhardt, Michael AU - Hebdon, Matthew AU - Williamson, Eric AU - Park, Sunghyun AU - Patel, Shrey A2 - University of Texas at Austin. Center for Transportation Research A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - The researchers carried out parametric finite element analyses (FEA) and field monitoring to develop improved guidelines for the widespread use of lean-on bracing applications in Texas bridges. Researchers instrumented and tested two existing bridges with lean-on bracing. Strain and displacement measurements from the completed bridges and existing data from a lean-on bridge during construction were used to validate FEA models. The validated modeling procedures were applied to a parametric study to evaluate the behavior of bridge systems with various lean-on bracing layouts. Additionally, design equations were derived resulting in improved accuracy and streamlining of the design process. The revised design procedures are summarized and demonstrated with accompanying examples. AN - dot:93057 ET - Project Summary Report KW - Structural stability (Mechanics) KW - Bracing KW - Steel bridges KW - Bridge construction KW - Weight KW - Bridge performance KW - Finite element method KW - Guidelines KW - stability bracing KW - lean-on bracing KW - cross-frame behavior LA - English PB - University of Texas at Austin. Center for Transportation Research PY - 2024-01-31 SN - 0-7093: TI - Refined Design Methods for Lean-On Bracing [Project Summary Report] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93057 ER - DB - ROSA P
Droplet Sizing Instrumentation Used for Icing Research: Operation, Calibration, and Accuracy

Hovenac, Edward A.

1989-08-01 | PDF

The accuracy of the Forward Scattering Spectrometer Probe (FSSP) is determined using laboratory tests, wind tunnel comparisons, and computer simulations. Operation in an icing environment is discussed and a new calibration device for the FSSP (the rotating pinhole) is demonstrated to be a valuable tool. Operation of the Optical Array Probe is also ...

08/24/2026

Title : Droplet Sizing Instrumentation Used for Icing Research: Operation, Calibration, and Accuracy Creator(s) : Hovenac, Edward A. Corporate Creator(s) : Sverdrup Technology, Inc Corporate Contributor(s) : Lewis Research Center;United States. Department of Transportation. Federal Aviation Administration; Published Date : 1989-08-01 Report Number : DOT/FAA/CT-89/13 URL : https://rosap.ntl.bts.gov/view/dot/93056
Hovenac, Edward A. (1989). Droplet Sizing Instrumentation Used for Icing Research: Operation, Calibration, and Accuracy.

Hovenac, Edward A. "Droplet Sizing Instrumentation Used for Icing Research: Operation, Calibration, and Accuracy" (1989)

Hovenac, Edward A. "Droplet Sizing Instrumentation Used for Icing Research: Operation, Calibration, and Accuracy" , 1989
Export RIS Citation Information. TY - Tech Report AU - Hovenac, Edward A. A2 - Sverdrup Technology, Inc A3 - Lewis Research Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - The accuracy of the Forward Scattering Spectrometer Probe (FSSP) is determined using laboratory tests, wind tunnel comparisons, and computer simulations. Operation in an icing environment is discussed and a new calibration device for the FSSP (the rotating pinhole) is demonstrated to be a valuable tool. Operation of the Optical Array Probe is also presented along with a calibration device (the rotating reticle) which is suitable for performing detailed analysis of that instrument. AN - dot:93056 ET - Final Report KW - Airplanes KW - Climate KW - Ice prevention KW - Mathematical models LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-08-01 SN - DOT/FAA/CT-89/13 TI - Droplet Sizing Instrumentation Used for Icing Research: Operation, Calibration, and Accuracy M3 - Tech Report N1 - United States N1 - NAS3-25266 UR - https://rosap.ntl.bts.gov/view/dot/93056 ER - DB - ROSA P
Airplane Tests of Enhanced Emergency Smoke Venting (Supplemental Data)

Maylor, Elliott L.

1989-03-01 | PDF

This document contains supplemental data to support DOT/FAA/CT-89/9. It consists of the following appendixes to that report:Appendix A, Test 90-1Appendix B, Test 90-2Appendix C, Test 90-3Appendix D, Smoke Meter DataAppendix E, Acceptance Test Data Sheets, Flow Control Valves

08/24/2026

Title : Airplane Tests of Enhanced Emergency Smoke Venting (Supplemental Data) Creator(s) : Maylor, Elliott L. Corporate Creator(s) : Boeing Commercial Airplane Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1989-03-01 Report Number : DOT/FA A/CT -89/9-A URL : https://rosap.ntl.bts.gov/view/dot/93055
Maylor, Elliott L. (1989). Airplane Tests of Enhanced Emergency Smoke Venting (Supplemental Data).

Maylor, Elliott L. "Airplane Tests of Enhanced Emergency Smoke Venting (Supplemental Data)" (1989)

Maylor, Elliott L. "Airplane Tests of Enhanced Emergency Smoke Venting (Supplemental Data)" , 1989
Export RIS Citation Information. TY - Tech Report AU - Maylor, Elliott L. A2 - Boeing Commercial Airplane A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This document contains supplemental data to support DOT/FAA/CT-89/9. It consists of the following appendixes to that report: AB - Appendix A, Test 90-1 AB - Appendix B, Test 90-2 AB - Appendix C, Test 90-3 AB - Appendix D, Smoke Meter Data AB - Appendix E, Acceptance Test Data Sheets, Flow Control Valves AN - dot:93055 ET - Supplemental Data KW - Air conditioning systems KW - Aircraft cabins KW - Airplanes KW - Fires LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-03-01 SN - DOT/FA A/CT -89/9-A TI - Airplane Tests of Enhanced Emergency Smoke Venting (Supplemental Data) M3 - Tech Report N1 - United States N1 - DTFA03-88-C-00056 UR - https://rosap.ntl.bts.gov/view/dot/93055 ER - DB - ROSA P
Airplane Tests of Enhanced Emergency Smoke Venting

Maylor, Elliott L.

1989-03-01 | PDF

This airplane test program evaluated the capability of air conditioning (environmental control) system modifications to enhance the venting of neutral or buoyant smoke that may be continuously injected into the passenger cabin during an inflight fire emergency. The program used a Boeing 757 airplane modified by adding an outflow valve in the forwar ...

08/24/2026

Title : Airplane Tests of Enhanced Emergency Smoke Venting Creator(s) : Maylor, Elliott L. Corporate Creator(s) : Boeing Commercial Airplane Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1989-03-01 Report Number : DOT/FANCT-89/9 URL : https://rosap.ntl.bts.gov/view/dot/93054
Maylor, Elliott L. (1989). Airplane Tests of Enhanced Emergency Smoke Venting.

Maylor, Elliott L. "Airplane Tests of Enhanced Emergency Smoke Venting" (1989)

Maylor, Elliott L. "Airplane Tests of Enhanced Emergency Smoke Venting" , 1989
Export RIS Citation Information. TY - Tech Report AU - Maylor, Elliott L. A2 - Boeing Commercial Airplane A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This airplane test program evaluated the capability of air conditioning (environmental control) system modifications to enhance the venting of neutral or buoyant smoke that may be continuously injected into the passenger cabin during an inflight fire emergency. The program used a Boeing 757 airplane modified by adding an outflow valve in the forward upper lobe fuselage and changing to high-flow control valves in both air conditioning packs. Artificially generated smoke, neutral and with helium added to simulate buoyancy, was released at various passenger cabin locations. Data from the ground tests showed that an upper lobe outflow valve controls either neutral or buoyant smoke. Cruise/descend/land test results showed that neutral smoke can be controlled with either an upper or lower lobe outflow valve if the outflow valve and the smoke source are at the same end of the passenger cabin; this capability is not changed significantly by a 30% increase to the current pack flow rate. The results also showed that maintaining pack flow while doors are open for passenger evacuation causes an undesirable increase in the rate of smoke spreading into the smoke free portions of the cabin. AN - dot:93054 ET - Final Report KW - Air conditioning systems KW - Aircraft cabins KW - Airplanes KW - Fires LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-03-01 SN - DOT/FANCT-89/9 TI - Airplane Tests of Enhanced Emergency Smoke Venting M3 - Tech Report N1 - United States N1 - DTF A03-88-C-00056 UR - https://rosap.ntl.bts.gov/view/dot/93054 ER - DB - ROSA P
Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1985

DeLucia, R. A. ;

Salvino, J. T.

1989-07-01 | PDF

This report presents statistics relating to gas turbine engine rotor failures which occurred during 1985 in U. S. commercial aviation service use. Two hundred and seventy-three failures occurred in 1985. Rotor fragments were generated in 150 of the failures, and of these 14 were uncontained. The predominant failure involved blade fragments, 94.4 pe ...

08/24/2026

Title : Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1985 Creator(s) : DeLucia, R. A.;Salvino, J. T.;Fenton, B. C.; Corporate Creator(s) : Naval Air Propulsion Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1989-07-01 Report Number : DOT/ FAA/CT-8917 URL : https://rosap.ntl.bts.gov/view/dot/93053
DeLucia, R. A. et al. (1989). Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1985.

DeLucia, R. A. and Salvino, J. T. and Fenton, B. C. "Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1985" (1989)

DeLucia, R. A. et al. "Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1985" , 1989
Export RIS Citation Information. TY - Tech Report AU - DeLucia, R. A. AU - Salvino, J. T. AU - Fenton, B. C. A2 - Naval Air Propulsion Center A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report presents statistics relating to gas turbine engine rotor failures which occurred during 1985 in U. S. commercial aviation service use. Two hundred and seventy-three failures occurred in 1985. Rotor fragments were generated in 150 of the failures, and of these 14 were uncontained. The predominant failure involved blade fragments, 94.4 percent of which were contained. Six disk failures occurred and all were uncontained. Fifty-seven percent of the 273 failures occurred during the takeoff and climb stages of flight. AN - dot:93053 ET - Final Report KW - 20th century KW - Aeronautics KW - Aircraft KW - Airplanes KW - Crashes KW - Gas turbines KW - Statistics KW - Turbine engines KW - Turboprop engines LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-07-01 SN - DOT/ FAA/CT-8917 TI - Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1985 M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93053 ER - DB - ROSA P
Program Plan - National Aging Aircraft Research Program [1991]

United States. Department of Transportation. Federal Aviation Administration. Technical Center

1991-09-01 | PDF

The inevitable effects of aircraft aging are progressive increases in the probability of damage from fatigue and corrosion. The continued safe operation of the United States commercial fleet will depend on the ability to anticipate required adjustments in the inspection and maintenance activities to compensate for the "aging" process. Increasing nu ...

08/24/2026

Current

Title : Program Plan - National Aging Aircraft Research Program [1991] Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1991-09-01 Report Number : DOT/FAA/CT-88/32-1 URL : https://rosap.ntl.bts.gov/view/dot/93052
United States. Department of Transportation. Federal Aviation Administration. Technical Center (1991). Program Plan - National Aging Aircraft Research Program [1991].

United States. Department of Transportation. Federal Aviation Administration. Technical Center "Program Plan - National Aging Aircraft Research Program [1991]" (1991)

United States. Department of Transportation. Federal Aviation Administration. Technical Center "Program Plan - National Aging Aircraft Research Program [1991]" , 1991
Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - The inevitable effects of aircraft aging are progressive increases in the probability of damage from fatigue and corrosion. The continued safe operation of the United States commercial fleet will depend on the ability to anticipate required adjustments in the inspection and maintenance activities to compensate for the "aging" process. Increasing numbers of aircraft are exceeding their economic design life--the age at which they have historically been retired from major airline service. Presumably, commercial aircraft are designed for "infinite life with proper maintenance." But public confidence in operators' abilities to properly maintain older aircraft significantly diminished following the Widely publicized failure of the Aloha Airlines 737 fuselage in 1988. AB - Revision of DOT/FAA/CT-88/32 printed in August 1989 and May 1989. AN - dot:93052 ET - Program Plan KW - Airplanes KW - Corrosion KW - Maintenance LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1991-09-01 SN - DOT/FAA/CT-88/32-1 TI - Program Plan - National Aging Aircraft Research Program [1991] M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93052 ER - DB - ROSA P
Program Plan - National Aging Aircraft Research Plan

United States. Department of Transportation. Federal Aviation Administration. Technical Center

1989-08-01 | PDF

The Federal Aviation Administration's (FAA) National Aging Aircraft Research Program Plan describes planned research efforts designed to enhance aircraft and passenger safety through a better understanding of airframe and powerplant structural performance and maintainability including relevant human factors. The plan also identifies program partici ...

08/24/2026

Superseded

Title : Program Plan - National Aging Aircraft Research Plan Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 1989-08-01 Report Number : DOT/FAA/CT-88/32 URL : https://rosap.ntl.bts.gov/view/dot/93051
United States. Department of Transportation. Federal Aviation Administration. Technical Center (1989). Program Plan - National Aging Aircraft Research Plan.

United States. Department of Transportation. Federal Aviation Administration. Technical Center "Program Plan - National Aging Aircraft Research Plan" (1989)

United States. Department of Transportation. Federal Aviation Administration. Technical Center "Program Plan - National Aging Aircraft Research Plan" , 1989
Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - The Federal Aviation Administration's (FAA) National Aging Aircraft Research Program Plan describes planned research efforts designed to enhance aircraft and passenger safety through a better understanding of airframe and powerplant structural performance and maintainability including relevant human factors. The plan also identifies program participants and describes management tasks and schedules. AN - dot:93051 ET - Program Plan KW - Airplanes KW - Corrosion KW - Maintenance LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1989-08-01 SN - DOT/FAA/CT-88/32 TI - Program Plan - National Aging Aircraft Research Plan M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/93051 ER - DB - ROSA P
Refined Design Methods for Lean-on Bracing

Bjelland, Aiden ;

Gasser, Claire

2026-08-01 | PDF

Cross frames are structural elements that are critical for the stability of steel bridges during erection and construction and also play an important role for completed bridges. Historically, the brace locations have been regions of fatigue concerns. In addition, the braces require significant handling and processing during fabrication and represen ...

08/24/2026

Title : Refined Design Methods for Lean-on Bracing Creator(s) : Bjelland, Aiden;Gasser, Claire;Fish, David;Helwig, Todd;Yarnold, Matthew;Park, Sunghyun;Patel, Shrey;Hurlebaus, Stefan;Hebdon, Matthew;Engelhardt, Michael;Williamson, Eric; Corporate Creator(s) : University of Texas at Austin. Center for Transportation Research;Texas A&M University. Texas Transportation Institute; Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-08-01 Report Number : FHWA/TX-24/0-7093-1 URL : https://rosap.ntl.bts.gov/view/dot/93050
Bjelland, Aiden et al. (2026). Refined Design Methods for Lean-on Bracing.

Bjelland, Aiden et al. "Refined Design Methods for Lean-on Bracing" (2026)

Bjelland, Aiden et al. "Refined Design Methods for Lean-on Bracing" , 2026
Export RIS Citation Information. TY - Tech Report AU - Bjelland, Aiden AU - Gasser, Claire AU - Fish, David AU - Helwig, Todd AU - Yarnold, Matthew AU - Park, Sunghyun AU - Patel, Shrey AU - Hurlebaus, Stefan AU - Hebdon, Matthew AU - Engelhardt, Michael AU - Williamson, Eric A2 - University of Texas at Austin. Center for Transportation Research A2 - Texas A&M University. Texas Transportation Institute A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Cross frames are structural elements that are critical for the stability of steel bridges during erection and construction and also play an important role for completed bridges. Historically, the brace locations have been regions of fatigue concerns. In addition, the braces require significant handling and processing during fabrication and represent one of the most expensive components per unit weight on the bridge. Therefore, there are major benefits in terms of economics and structural performance to minimize the number of cross frames. Lean-on bracing concepts that replace full cross frames in certain bracing lines with top and bottom struts that allow a single cross frame to brace several girders is a method of minimizing the number of cross frames on a bridge. Lean-on concepts for bridge applications were developed in the early 2000's on TxDOT study 0-1772. While the previous study developed design guidelines, recent applications of lean-on bracing on TxDOT bridge designs demonstrated the need for improved efficiency and clarity. The research conducted on this investigation include field monitoring, parametric finite element analyses, and the development of design equations based upon extensive parametric finite element analyses. Results of the research are presented and discussed and refined design methods were developed that provide guidance on effective use of lean-on bracing. The recommendations are demonstrated through design examples. AN - dot:93050 ET - September 1, 2020 - January 12, 2026 KW - Structural stability (Mechanics) KW - Bracing KW - Steel bridges KW - Bridge construction KW - Weight KW - Bridge performance KW - Finite element method KW - Guidelines KW - stability bracing KW - lean-on bracing KW - cross-frame behavior LA - English PB - University of Texas at Austin. Center for Transportation Research PY - 2026-08-01 SN - FHWA/TX-24/0-7093-1 TI - Refined Design Methods for Lean-on Bracing M3 - Tech Report N1 - United States N1 - 0-7093 UR - https://rosap.ntl.bts.gov/view/dot/93050 ER - DB - ROSA P
Demonstration of Infrared Pavement Heater

Harris, Dwayne

2026-02-06 | PDF

Indiana Department of Transportation (INDOT) maintenance currently employs several patching methodologies; however, prior to this study, INDOT had little experience with using infrared pavement heaters as a maintenance tool. The purpose of this research was to introduce pavement heating technologies and provide INDOT maintenance personnel with expe ...

08/24/2026

Title : Demonstration of Infrared Pavement Heater Creator(s) : Harris, Dwayne Corporate Creator(s) : Purdue University. Joint Transportation Research Program Corporate Contributor(s) : Indiana Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-02-06 Report Number : FHWA/IN/JTRP-2026/05 DOI : https://doi.org/10.5703/1288284318613
Harris, Dwayne (2026). Demonstration of Infrared Pavement Heater. https://doi.org/10.5703/1288284318613

Harris, Dwayne "Demonstration of Infrared Pavement Heater" (2026), https://doi.org/10.5703/1288284318613

Harris, Dwayne "Demonstration of Infrared Pavement Heater" , 2026, https://doi.org/10.5703/1288284318613
Export RIS Citation Information. TY - Tech Report AU - Harris, Dwayne A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Indiana Department of Transportation (INDOT) maintenance currently employs several patching methodologies; however, prior to this study, INDOT had little experience with using infrared pavement heaters as a maintenance tool. The purpose of this research was to introduce pavement heating technologies and provide INDOT maintenance personnel with experience using these technologies. AN - dot:93049 DO - https://doi.org/10.5703/1288284318613 ET - Final Report KW - Pavement design KW - Patching KW - Potholes KW - Case studies KW - Cracking KW - Rutting KW - Maintenance KW - Fatigue tests KW - infrared pavement heater LA - English PB - Purdue University. Joint Transportation Research Program PY - 2026-02-06 SN - FHWA/IN/JTRP-2026/05 TI - Demonstration of Infrared Pavement Heater M3 - Tech Report N1 - United States N1 - SPR-4604 UR - https://rosap.ntl.bts.gov/view/dot/93049 ER - DB - ROSA P
Truck Parking Shortage: Improving Efficiency and Identifying Opportunities

Stich, Bethany

;

Mallum, Faisal

2026-07-01 | PDF

Providing safe and secure parking for the more than three million heavy trucks that move over 70% of the nation's freight is both a local and national issue. This is especially true for a major freight hub such as Louisiana, with its freight-intensive corridors, including I-10 and I-12. Currently, there is only one parking spot for every 11 trucks ...

08/24/2026

Title : Truck Parking Shortage: Improving Efficiency and Identifying Opportunities Creator(s) : Stich, Bethany;Mallum, Faisal; Corporate Creator(s) : UNO Transportation Institute;Louisiana Transportation Research Center; Corporate Contributor(s) : Louisiana. Department of Highways. Research and Development Section;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-07-01 Report Number : FHWA/LA.26/728;25-2SS; URL : https://rosap.ntl.bts.gov/view/dot/93048
Stich, Bethany and Mallum, Faisal (2026). Truck Parking Shortage: Improving Efficiency and Identifying Opportunities.

Stich, Bethany and Mallum, Faisal "Truck Parking Shortage: Improving Efficiency and Identifying Opportunities" (2026)

Stich, Bethany and Mallum, Faisal "Truck Parking Shortage: Improving Efficiency and Identifying Opportunities" , 2026
Export RIS Citation Information. TY - Tech Report AU - Stich, Bethany AU - Mallum, Faisal A2 - UNO Transportation Institute A2 - Louisiana Transportation Research Center A3 - Louisiana. Department of Highways. Research and Development Section A3 - United States. Department of Transportation. Federal Highway Administration AB - Providing safe and secure parking for the more than three million heavy trucks that move over 70% of the nation's freight is both a local and national issue. This is especially true for a major freight hub such as Louisiana, with its freight-intensive corridors, including I-10 and I-12. Currently, there is only one parking spot for every 11 trucks in the state, and these shortages lead to illegal parking, creating safety, operational, and economic challenges that ripple through Louisiana's freight system. These include non-compliance with Hours-of-Service regulations, economic and freight inefficiencies, and quality-of-life issues for impacted communities. This report presents the results of research that evaluated truck parking conditions in Louisiana and proposes short- and long-term solutions to address these problems. This study employed a mixed-methods approach to data collection and analysis, combining a literature review that synthesized state and national policies and local zoning laws, stakeholder surveys and interviews, GIS and spatial analyses, qualitative thematic analysis, and economic modeling using IMPLAN to assess the impacts of developing truck parking facilities in Louisiana. The cost of not investing in truck parking in the state was also calculated. Data were collected from a wide range of stakeholders, including truck drivers, trucking companies, communities, local government officials, truck parking companies, and law enforcement personnel, providing the necessary input for analyzing issues related to truck parking in Louisiana. AN - dot:93048 ET - Final Report December: 2024 to May 2026 KW - Trucks KW - Freight transportation KW - Land use KW - Transportation safety KW - Zoning KW - Literature reviews KW - Parking KW - Data collection KW - Decision making KW - Truck parking KW - freight mobility KW - land use and zoning policy LA - English PB - Louisiana Transportation Research Center PY - 2026-07-01 SN - FHWA/LA.26/728 TI - Truck Parking Shortage: Improving Efficiency and Identifying Opportunities M3 - Tech Report N1 - United States N1 - DOTLT1000559 UR - https://rosap.ntl.bts.gov/view/dot/93048 ER - DB - ROSA P

Previous Page Previous

81 - 100 / 427

Next Page Next

Found an issue?

Send us an email at: