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Showing 241 - 260 of 427 results

Evaluation of the PAVEDEX Road Survey System in Iowa

Cable, James K. ;

Dankbar, Roman

1990-04-01 | PDF

The Iowa Department of Transportation (IDOT) evaluated the PAS I Road Survey System from PAVEDEX, Inc., of Spokane, Washington. This system uses video photography to identify and quantify pavement cracking and patching distresses. Comparisons were made to procedures currently used in the State. Interstate highway, county roads and city streets, and ...

08/10/2026

Title : Evaluation of the PAVEDEX Road Survey System in Iowa Creator(s) : Cable, James K.;Dankbar, Roman; Corporate Creator(s) : Iowa. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration;United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center; Contributor(s) : Brown, Douglas Published Date : 1990-04-01 Report Number : FHWA-TS-90-038 URL : https://rosap.ntl.bts.gov/view/dot/92907
Cable, James K. and Dankbar, Roman (1990). Evaluation of the PAVEDEX Road Survey System in Iowa.

Cable, James K. and Dankbar, Roman "Evaluation of the PAVEDEX Road Survey System in Iowa" (1990)

Cable, James K. and Dankbar, Roman "Evaluation of the PAVEDEX Road Survey System in Iowa" , 1990
Export RIS Citation Information. TY - Tech Report AU - Cable, James K. AU - Dankbar, Roman A2 - Iowa. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Brown, Douglas A4 - Brown, Doug AB - The Iowa Department of Transportation (IDOT) evaluated the PAS I Road Survey System from PAVEDEX, Inc., of Spokane, Washington. This system uses video photography to identify and quantify pavement cracking and patching distresses. Comparisons were made to procedures currently used in the State. Interstate highway, county roads and city streets, and two shoulder sections were evaluated. Variables included travel speeds, surface type and texture, and traffic control conditions. Repeatability and distress identification were excellent on rigid pavements. Differences in distress identification and the effect of surface textures in the flexible test sections limited the repeatability and correlation of data to that of the IDOT method. Cost data indicates that PAVEDEX is capable of providing comparable results with improved accuracy at a reasonable cost, but in excess of that experienced currently by the IDOT. PAVEDEX is capable of providing network level pavement condition data at highway speeds and analysis of the data to identify 1/8-inch cracks at approximately 2-3 lane miles per hour with manual evaluation. Photologging capability is also included in the unit. AN - dot:92907 ET - Final Report KW - Condition surveys KW - Pavement distress KW - Evaluation KW - Pavement design KW - Pavement cracking KW - Testing equipment LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 1990-04-01 SN - FHWA-TS-90-038 TI - Evaluation of the PAVEDEX Road Survey System in Iowa M3 - Tech Report N1 - United States N1 - DTFH61-88-C-00138 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92907 ER - DB - ROSA P
Emissions Benefits of Land Use Planning Strategies

Louis Berger, Inc.

2004-12-20 | PDF

The U.S. Department of Transportation (USDOT) Federal Highway Administration sponsored a study of the methods currently employed to quantify mobile source emissions benefits from land use changes. The study contains reviews of 46 relevant literature items; 10 case studies from around the country describing applied methods; state-of-the-practice and ...

08/10/2026

Title : Emissions Benefits of Land Use Planning Strategies Corporate Creator(s) : Louis Berger, Inc. Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2004-12-20 Report Number : FHWA-TOPR-29 URL : https://rosap.ntl.bts.gov/view/dot/92906
Louis Berger, Inc. (2004). Emissions Benefits of Land Use Planning Strategies.

Louis Berger, Inc. "Emissions Benefits of Land Use Planning Strategies" (2004)

Louis Berger, Inc. "Emissions Benefits of Land Use Planning Strategies" , 2004
Export RIS Citation Information. TY - Tech Report A2 - Louis Berger, Inc. A3 - United States. Department of Transportation. Federal Highway Administration AB - The U.S. Department of Transportation (USDOT) Federal Highway Administration sponsored a study of the methods currently employed to quantify mobile source emissions benefits from land use changes. The study contains reviews of 46 relevant literature items; 10 case studies from around the country describing applied methods; state-of-the-practice and advanced practice methods; and recommendations for future technical and procedural improvements. The Research Team found that a variety of studies and applications have been performed by a relatively few number of researchers and Metropolitan Planning Organizations (MPOs). Rather than pursuing this work as part of a conformity determination, many of these exercises have been accomplished as part of a community "visioning" process undertaken by local governments. The research that has been done has identified relationships between vehicle miles of travel, trip frequency, trip length, and mode choice. Also, a number of problems with the research have been noted, including consistency in data development, availability of data, subjectivity in measurement, shortcomings in existing modeling techniques, difficulty in assigning causation, and cross-correlation between independent variables. The paper concludes with recommendations and ideas for future research to improve land use, travel demand and emissions models; and support pathways of the dissemination of information among end-user communities. Appendices and the accompanying CD-ROM contain data resources, case studies, and a summary of elasticity applications. AN - dot:92906 KW - Exhaust gases KW - Air quality KW - Land use KW - Travel demand KW - Travel behavior KW - Land use planning LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2004-12-20 SN - FHWA-TOPR-29 TI - Emissions Benefits of Land Use Planning Strategies M3 - Tech Report N1 - United States N1 - DTFH61-98-D-00105 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92906 ER - DB - ROSA P
Geotextile Selection and Installation Manual for Rural Unpaved Roads

Hopkins, J.

1989-04-01 | PDF

This report is to serve as a guide for local officials in selecting and installing geotextiles on rural unpaved roads. Various techniques are presented to address most of the common conditions and situations present on rural roads.

08/10/2026

Title : Geotextile Selection and Installation Manual for Rural Unpaved Roads Creator(s) : Hopkins, J. Corporate Creator(s) : Oklahoma State University. Center for Local Government Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration;National Highway Institute (U.S.); Contributor(s) : DiMaggio, Jerry A.;Hershey, H Garland; Published Date : 1989-04-01 Report Number : FHWA-RT-89-050 URL : https://rosap.ntl.bts.gov/view/dot/92905
Hopkins, J. (1989). Geotextile Selection and Installation Manual for Rural Unpaved Roads.

Hopkins, J. "Geotextile Selection and Installation Manual for Rural Unpaved Roads" (1989)

Hopkins, J. "Geotextile Selection and Installation Manual for Rural Unpaved Roads" , 1989
Export RIS Citation Information. TY - Tech Report AU - Hopkins, J. A2 - Oklahoma State University. Center for Local Government Technology A3 - United States. Department of Transportation. Federal Highway Administration A3 - National Highway Institute (U.S.) A4 - DiMaggio, Jerry A. A4 - Hershey, H Garland A4 - Dimaggio, J.; Hershey, H. AB - This report is to serve as a guide for local officials in selecting and installing geotextiles on rural unpaved roads. Various techniques are presented to address most of the common conditions and situations present on rural roads. AN - dot:92905 ET - Technology Sharing Report KW - Geotextiles KW - Construction KW - Rural highways KW - Unpaved roads KW - Installation KW - Manuals LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 1989-04-01 SN - FHWA-RT-89-050 TI - Geotextile Selection and Installation Manual for Rural Unpaved Roads M3 - Tech Report N1 - United States N1 - RTAP #56 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92905 ER - DB - ROSA P
Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design: Final Report

Parr, Scott A.

;

Morgan, Delaney

2026-08-01 | PDF

Over the past several decades, the U.S. vehicle fleet has shifted toward larger, taller, and heavier vehicles, raising questions about whether roadside safety systems remain aligned with real-world vehicle characteristics. This study evaluated the adequacy of the Florida Department of Transportation's current 31-inch guardrail height standard relat ...

08/10/2026

Title : Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design: Final Report Creator(s) : Parr, Scott A.;Morgan, Delaney; Corporate Creator(s) : Embry-Riddle Aeronautical University Corporate Contributor(s) : Florida. Department of Transportation Published Date : 2026-08-01 URL : https://rosap.ntl.bts.gov/view/dot/92904
Parr, Scott A. and Morgan, Delaney (2026). Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design: Final Report.

Parr, Scott A. and Morgan, Delaney "Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design: Final Report" (2026)

Parr, Scott A. and Morgan, Delaney "Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design: Final Report" , 2026
Export RIS Citation Information. TY - Tech Report AU - Parr, Scott A. AU - Morgan, Delaney A2 - Embry-Riddle Aeronautical University A3 - Florida. Department of Transportation AB - Over the past several decades, the U.S. vehicle fleet has shifted toward larger, taller, and heavier vehicles, raising questions about whether roadside safety systems remain aligned with real-world vehicle characteristics. This study evaluated the adequacy of the Florida Department of Transportation's current 31-inch guardrail height standard relative to the previous 27¾-inch standard and recent guardrail failure outcomes in Florida. The research included a review of guardrail height practices, analysis of vehicle center of gravity, weight, and fleet composition trends, identification and classification of confirmed guardrail failure crashes, statistical comparison of failure patterns by guardrail height and vehicle characteristics, and an Annual Average Daily Traffic-normalized hot-spot analysis. Confirmed failures with known guardrail height were distributed in proportions consistent with statewide inventory prevalence, indicating no evidence that either height standard was overrepresented in the failure dataset overall. Vehicle center of gravity was significantly higher in Over failures than in Through failures, while vehicle weight was not a significant predictor of failure mode. Over failures were directionally less common at 31-inch installations than expected based on inventory proportions, but the difference was not statistically significant. The hot-spot analysis identified locations where repeated failures may warrant additional field or engineering review. Overall, the findings support continued use of the 31-inch standard while emphasizing continued monitoring of vehicle fleet trends, guardrail performance, site-specific failure conditions, and potential future design adaptations as the vehicle fleet continues to evolve. AN - dot:92904 ET - Final Report KW - Guardrails KW - Standards KW - Roadside KW - Highway safety KW - Impact KW - Vehicle performance KW - Literature reviews KW - Crash data KW - Datasets KW - Fleet management KW - Statistical analysis KW - Guardrail Height Standards KW - Roadside Safety KW - Vehicle Impact Performance LA - English PB - Florida. Department of Transportation PY - 2026-08-01 TI - Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design: Final Report M3 - Tech Report N1 - United States N1 - BED32-977-03 UR - https://rosap.ntl.bts.gov/view/dot/92904 ER - DB - ROSA P
Sensitivity Analysis of MOBILE6: Motor Vehicle Emission Factor Model

Tang, Tianjia ;

Roberts, Mike

2003-01-01 | PDF

On January 29, 2002, the US Environmental Protection Agency (EPA) officially released the latest motor vehicle emission factor model - MOBILE6. This release represents significant achievements in understanding both the motor vehicle performance and driver behavior when estimating motor vehicle emissions. The model also establishes routines to compu ...

08/10/2026

Title : Sensitivity Analysis of MOBILE6: Motor Vehicle Emission Factor Model Creator(s) : Tang, Tianjia;Roberts, Mike;Ho, Cecilia; Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Resource Center Published Date : 2003-01-01 Report Number : FHWA-RC-Atlanta-03-0007 URL : https://rosap.ntl.bts.gov/view/dot/92903
Tang, Tianjia et al. (2003). Sensitivity Analysis of MOBILE6: Motor Vehicle Emission Factor Model.

Tang, Tianjia and Roberts, Mike and Ho, Cecilia "Sensitivity Analysis of MOBILE6: Motor Vehicle Emission Factor Model" (2003)

Tang, Tianjia et al. "Sensitivity Analysis of MOBILE6: Motor Vehicle Emission Factor Model" , 2003
Export RIS Citation Information. TY - Brief AU - Tang, Tianjia AU - Roberts, Mike AU - Ho, Cecilia A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Resource Center AB - On January 29, 2002, the US Environmental Protection Agency (EPA) officially released the latest motor vehicle emission factor model - MOBILE6. This release represents significant achievements in understanding both the motor vehicle performance and driver behavior when estimating motor vehicle emissions. The model also establishes routines to compute and analyze fuel and vehicle certification standards, state programs and different highway facilities as related to vehicle emission factors. Significant efforts by the US EPA were also carried out to establish a national default database used by the computer model. Along with the MOBILE6 release, more than 48 technical papers related to MOBILE6 development were also released. Overall, the MOBILE6 model predicts higher emission rates in the near future years and lower emission rates in the out years when compared to the MOBILE5 series models. MOBILE6 is the approved US EPA motor vehicle emission factor model for estimating volatile organic compounds (VOC), nitrogen oxides (NOx), and carbon monoxide (CO) from different vehicles. State and local air quality and transportation agencies outside of California are required to use MOBILE6 in State Implementation Plan (SIP) development, and transportation conformity determination. The official release of MOBILE6 on January 29, 2002 started the 2-year grace period before MOBILE6 is required for new conformity determinations in most areas. As the end of the grace period approaches, transportation as well as air quality agencies are gaining an understanding of the behavior of the model, especially in impacts of using localized data as compared to EPA's national default data. Understanding the behavior of the model under various conditions becomes more critical as the tasks of collecting local data is time and resources intensive. The purpose of this paper is to provide a basic evaluation of the MOBILE6 model behavior under various conditions. Through the understanding of the model's behavior, state and local agencies can prioritize costly data collecting efforts and ultimately initiate emission control strategies according to parameter sensitivity. AN - dot:92903 KW - Exhaust gases KW - Air pollution KW - Air quality KW - Environmental protection KW - Sensitivity analysis LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2003-01-01 SN - FHWA-RC-Atlanta-03-0007 TI - Sensitivity Analysis of MOBILE6: Motor Vehicle Emission Factor Model M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92903 ER - DB - ROSA P
Navigation Recovery Block Design Description

Hitt, E. F. ;

Prater, S. A.

1987-03-01 | PDF

This report describes the recovery block approach to fault-tolerant software and illustrates its application to a flight navigation problem. The navigation problem using VOR (Visual Omnirange) and DME (Distance Measuring Equipment) is developed, especially with regard to its software specification and implementation needs. Related aspects of the re ...

08/10/2026

Title : Navigation Recovery Block Design Description Creator(s) : Hitt, E. F.;Prater, S. A.; Corporate Creator(s) : Lockheed-California Company Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-03-01 Report Number : DOT/FAA/CT-87/15 URL : https://rosap.ntl.bts.gov/view/dot/92902
Hitt, E. F. and Prater, S. A. (1987). Navigation Recovery Block Design Description.

Hitt, E. F. and Prater, S. A. "Navigation Recovery Block Design Description" (1987)

Hitt, E. F. and Prater, S. A. "Navigation Recovery Block Design Description" , 1987
Export RIS Citation Information. TY - Tech Report AU - Hitt, E. F. AU - Prater, S. A. A2 - Lockheed-California Company A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report describes the recovery block approach to fault-tolerant software and illustrates its application to a flight navigation problem. The navigation problem using VOR (Visual Omnirange) and DME (Distance Measuring Equipment) is developed, especially with regard to its software specification and implementation needs. Related aspects of the recovery block approach are reviewed, and Ada implemented source code is presented. AN - dot:92902 ET - Final Report KW - Aeronautics KW - Airplanes KW - Electronic equipment KW - Electronics KW - Software KW - System architecture LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987-03-01 SN - DOT/FAA/CT-87/15 TI - Navigation Recovery Block Design Description M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/92902 ER - DB - ROSA P
Fuel Containment Concepts - Transport Category Airplanes

Wittlin, G.

1987-11-01 | PDF

This report describes a four phase study to identify potential fuel containment concepts for transport category aircraft. A literature survey was performed and the relative contributions from 53 documents are noted. Transport airplane data are summarized including the results from full-scale airplane crash tests and section tests. Analyses results ...

08/10/2026

Title : Fuel Containment Concepts - Transport Category Airplanes Creator(s) : Wittlin, G. Corporate Creator(s) : Lockheed-California Company Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-11-01 Report Number : DOT/FAA/CT-87/18 URL : https://rosap.ntl.bts.gov/view/dot/92901
Wittlin, G. (1987). Fuel Containment Concepts - Transport Category Airplanes.

Wittlin, G. "Fuel Containment Concepts - Transport Category Airplanes" (1987)

Wittlin, G. "Fuel Containment Concepts - Transport Category Airplanes" , 1987
Export RIS Citation Information. TY - Tech Report AU - Wittlin, G. A2 - Lockheed-California Company A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report describes a four phase study to identify potential fuel containment concepts for transport category aircraft. A literature survey was performed and the relative contributions from 53 documents are noted. Transport airplane data are summarized including the results from full-scale airplane crash tests and section tests. Analyses results which depict dynamic pulses are presented. Several reports including the U. S. Army Crash Survival Design Guide and the Special Aviation Fire and Explosion Reduction (SAFER) Advisory Committee are discussed in detail. Several fuel containment structural design concepts are evaluated with regard to both wing and fuselage usage. The state-of-the-art technology is summarized in this report. Included in this summary is a priority ranking of approaches. A selection of approaches is described. The selected concepts are reviewed with regard to benefit and penalties. The concepts are prioritized in order of effectiveness. AN - dot:92901 ET - Final Report KW - Aircraft KW - Analysis KW - Containing equipment KW - Crashworthiness KW - Design KW - Design methods KW - Fuel systems KW - Fuel tanks KW - Ratings KW - Strategic planning LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987-11-01 SN - DOT/FAA/CT-87/18 TI - Fuel Containment Concepts - Transport Category Airplanes M3 - Tech Report N1 - United States N1 - DTFA03-86-C-00005 UR - https://rosap.ntl.bts.gov/view/dot/92901 ER - DB - ROSA P
Assessment of Safety and Operation Performances of CFIs and DDIs in Utah [Research Brief]

Song, Yu (Fred)

;

Zlatkovic, Milan

2026-07-01 | PDF

This research provides a comprehensive evaluation of the operational and safety performance of diverging diamond interchanges and continuous flow intersections under Utah-specific conditions by employing a dual-framework methodology that analyzes 16 years of historical crash and traffic data (2006-2021). To address the limitations of isolated asses ...

08/10/2026

Title : Assessment of Safety and Operation Performances of CFIs and DDIs in Utah [Research Brief] Creator(s) : Song, Yu (Fred);Zlatkovic, Milan;Dhimal, Ramesh;Neupane, Kiran; Corporate Creator(s) : University of Wyoming;Upper Great Plains Transportation Institute; 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 : 2026-07-01 Report Number : CTIPS-26-004 URL : https://rosap.ntl.bts.gov/view/dot/92900
Song, Yu (Fred) et al. (2026). Assessment of Safety and Operation Performances of CFIs and DDIs in Utah [Research Brief].

Song, Yu (Fred) et al. "Assessment of Safety and Operation Performances of CFIs and DDIs in Utah [Research Brief]" (2026)

Song, Yu (Fred) et al. "Assessment of Safety and Operation Performances of CFIs and DDIs in Utah [Research Brief]" , 2026
Export RIS Citation Information. TY - Tech Report AU - Song, Yu (Fred) AU - Zlatkovic, Milan AU - Dhimal, Ramesh AU - Neupane, Kiran A2 - University of Wyoming A2 - Upper Great Plains Transportation Institute 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 provides a comprehensive evaluation of the operational and safety performance of diverging diamond interchanges and continuous flow intersections under Utah-specific conditions by employing a dual-framework methodology that analyzes 16 years of historical crash and traffic data (2006-2021). To address the limitations of isolated assessment methods, the first component utilizes safety-integrated microscopic traffic simulation via multimodal traffic simulation software, where surrogate safety measures-time-to-collision and maximum deceleration-were extracted and translated into predicted crash frequencies. The second component features a crash-based empirical evaluation to develop locally calibrated safety performance functions (an indicator of expected changes in crashes after implementing a countermeasure) and generate highly reliable, Utah-specific crash modification factors for fatal-and-injury crashes and property-damage-only crashes. By integrating surrogate safety analysis with rigorous empirical evaluation, this research equips transportation agencies with a transferable, data-driven framework to proactively assess both the efficiency and safety of innovative geometric intersection designs. AN - dot:92900 ET - Research Brief KW - Diamond interchanges KW - Empirical methods KW - Bayes' theorem KW - Surrogate safety measures KW - Evaluation and assessment KW - Performance KW - Calibration KW - Countermeasures KW - Crash data KW - Diverging Diamond Interchange KW - Continuous Flow Intersection KW - Extreme Value Theory LA - English PB - Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC) PY - 2026-07-01 SN - CTIPS-26-004 TI - Assessment of Safety and Operation Performances of CFIs and DDIs in Utah [Research Brief] M3 - Tech Report N1 - United States N1 - CTIPS-014 UR - https://rosap.ntl.bts.gov/view/dot/92900 ER - DB - ROSA P
Assessment of Safety and Operation Performances of CFIs and DDIs in Utah

Dhimal, Ramesh

;

Neupane, Kiran

2026-07-01 | PDF

The Diverging Diamond Interchange (DDI) and the Continuous Flow Intersection (CFI) represent significant innovations in roadway design, offering superior operational performance and enhanced safety compared to conventional signalized ramp terminals and intersections. This study conducts a comprehensive evaluation of these two designs, focusing on b ...

08/10/2026

Title : Assessment of Safety and Operation Performances of CFIs and DDIs in Utah Creator(s) : Dhimal, Ramesh;Neupane, Kiran;Song, Yu (Fred);Zlatkovic, Milan; Corporate Creator(s) : Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC);North Dakota State University; 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 : 2026-07-01 Report Number : CTIPS-26-004 URL : https://rosap.ntl.bts.gov/view/dot/92899
Dhimal, Ramesh et al. (2026). Assessment of Safety and Operation Performances of CFIs and DDIs in Utah.

Dhimal, Ramesh et al. "Assessment of Safety and Operation Performances of CFIs and DDIs in Utah" (2026)

Dhimal, Ramesh et al. "Assessment of Safety and Operation Performances of CFIs and DDIs in Utah" , 2026
Export RIS Citation Information. TY - Tech Report AU - Dhimal, Ramesh AU - Neupane, Kiran AU - Song, Yu (Fred) AU - Zlatkovic, Milan A2 - Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC) A2 - North Dakota State University 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 Diverging Diamond Interchange (DDI) and the Continuous Flow Intersection (CFI) represent significant innovations in roadway design, offering superior operational performance and enhanced safety compared to conventional signalized ramp terminals and intersections. This study conducts a comprehensive evaluation of these two designs, focusing on both traffic flow and safety outcomes. The research begins by establishing a safety integrated calibration and validation framework for microscopic traffic simulation models using PTV VISSIM. Unlike traditional approaches, this framework incorporates surrogate safety analysis by embedding bivariate Peak Over Threshold (POT) modeling from Extreme Value Theory (EVT) to jointly capture conflict severity using Time to Collision (TTC) and Maximum Deceleration (MaxD). This dual-purpose modeling approach allows for the estimation of crash frequency directly from simulated conflicts while maintaining operational fidelity. The calibration achieved high accuracy, with GEH values below 5 for all movements and minimal speed errors, and simulation-based crash estimates for CFIs differed from observed frequencies by only 0.07 crashes per year. Validation using 2019 data further confirmed the predictive capability and generalizability of the models. AN - dot:92899 KW - Diamond interchanges KW - Empirical methods KW - Bayes' theorem KW - Surrogate safety measures KW - Evaluation and assessment KW - Performance KW - Calibration KW - Diverging Diamond Interchange KW - Continuous Flow Intersection KW - Extreme Value Theory LA - English PB - Center for Transformative Infrastructure Preservation and Sustainability (CTIPS) Region 8 University Transportation Center (UTC) PY - 2026-07-01 SN - CTIPS-26-004 TI - Assessment of Safety and Operation Performances of CFIs and DDIs in Utah M3 - Tech Report N1 - United States N1 - 69A3552348308 UR - https://rosap.ntl.bts.gov/view/dot/92899 ER - DB - ROSA P
Advanced Automation Program HOST Computer System Acquisition Phase Acceptance Test Report

Koo, L. ;

DeGrandmaison, N. D.

1987-08-01 | PDF

This report summarizes the results of the Acceptance testing conducted during the Host Computer Acquisition Phase (AP) performed by IBH under contract number DTFA-01-85-C-00030. These tests were conducted at the Federal Aviation Administration (FAA) Technical Center beginning on September 17, 1985 and ending with FAA system acceptance on November 2 ...

08/10/2026

Title : Advanced Automation Program HOST Computer System Acquisition Phase Acceptance Test Report Creator(s) : Koo, L.;DeGrandmaison, N. D.;Olin, Carl; 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 : 1987-08-01 Report Number : DOT/FAA/CT-87/14 URL : https://rosap.ntl.bts.gov/view/dot/92898
Koo, L. et al. (1987). Advanced Automation Program HOST Computer System Acquisition Phase Acceptance Test Report.

Koo, L. and DeGrandmaison, N. D. and Olin, Carl "Advanced Automation Program HOST Computer System Acquisition Phase Acceptance Test Report" (1987)

Koo, L. et al. "Advanced Automation Program HOST Computer System Acquisition Phase Acceptance Test Report" , 1987
Export RIS Citation Information. TY - Tech Report AU - Koo, L. AU - DeGrandmaison, N. D. AU - Olin, Carl A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - This report summarizes the results of the Acceptance testing conducted during the Host Computer Acquisition Phase (AP) performed by IBH under contract number DTFA-01-85-C-00030. These tests were conducted at the Federal Aviation Administration (FAA) Technical Center beginning on September 17, 1985 and ending with FAA system acceptance on November 21, 1986. The Government lead in the Host acquisition acceptance testing was ACT-130, the Advanced Automation Branch located at the Technical Center. The tests were described in the Engineering Requirements of the Host AP Contract and were partitioned into three series; the Hardware/ Systems tests, the Support Software tests, and the Operational Software tests. All tests were conducted. by an IBM test team and witnessed by FAA and FAA support contractor personnel. This report describes the test objectives, the detailed analysis methods, and the results obtained during the AP testing. AN - dot:92898 ET - Final Report KW - Computers KW - Information processing KW - Management KW - Monitoring KW - Data collection KW - Data management KW - Host Computer System KW - Acquisition Phase Acceptance KW - IBM 9020 Replacement LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987-08-01 SN - DOT/FAA/CT-87/14 TI - Advanced Automation Program HOST Computer System Acquisition Phase Acceptance Test Report M3 - Tech Report N1 - United States N1 - T0504L UR - https://rosap.ntl.bts.gov/view/dot/92898 ER - DB - ROSA P
Krash Parametric Sensitivity Study - Transport Category Airplanes

Wittlin, G. ;

LaBarge, W. L.

1987-12-01 | PDF

This report describes a study subsequent to the CID pre-test and CID correlation presented previously in DOT/FAA/CT-85/9 and DOT/FAA/CT-86/13, respectively. KRASH models are used to perform parameter sensitivity studies. Analyses are performed for air-to-ground, ground-to-ground, and longitudinal-only impacts. The results are presented in the form ...

08/10/2026

Title : Krash Parametric Sensitivity Study - Transport Category Airplanes Creator(s) : Wittlin, G.;LaBarge, W. L.; Corporate Creator(s) : Lockheed-California Company Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-12-01 Report Number : DOT/FAA/CT-87/13 URL : https://rosap.ntl.bts.gov/view/dot/92897
Wittlin, G. and LaBarge, W. L. (1987). Krash Parametric Sensitivity Study - Transport Category Airplanes.

Wittlin, G. and LaBarge, W. L. "Krash Parametric Sensitivity Study - Transport Category Airplanes" (1987)

Wittlin, G. and LaBarge, W. L. "Krash Parametric Sensitivity Study - Transport Category Airplanes" , 1987
Export RIS Citation Information. TY - Tech Report AU - Wittlin, G. AU - LaBarge, W. L. A2 - Lockheed-California Company A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report describes a study subsequent to the CID pre-test and CID correlation presented previously in DOT/FAA/CT-85/9 and DOT/FAA/CT-86/13, respectively. KRASH models are used to perform parameter sensitivity studies. Analyses are performed for air-to-ground, ground-to-ground, and longitudinal-only impacts. The results are presented in the form of triangular pulses with definitions of the peak amplitude, base time duration and pulse change of velocity. The analytically obtained data are integrated with the full-scale aircraft and section test data to formulate crash design velocity envelopes. The results of the study are used to suggest seat dynamic test conditions. AN - dot:92897 ET - Final Report KW - Dynamics KW - Velocity KW - Dynamic tests KW - Crash tests KW - Aircraft KW - Mathematical analysis KW - Seats KW - Test procedures KW - KRASH LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987-12-01 SN - DOT/FAA/CT-87/13 TI - Krash Parametric Sensitivity Study - Transport Category Airplanes M3 - Tech Report N1 - United States N1 - DTFA03-84-C-00004 UR - https://rosap.ntl.bts.gov/view/dot/92897 ER - DB - ROSA P
LRFD Design Example for Steel Girder Superstructure Bridge with Commentary

Hartle, Raymond A. ;

Wilson, Kenneth E.

2003-12-01 | PDF

This document consists of a comprehensive steel girder bridge design example, with instructional commentary based on the AASHTO LRFD Bridge Design Specifications (Second Edition, 1998, including interims for 1999 through 2002). The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation ...

08/10/2026

Title : LRFD Design Example for Steel Girder Superstructure Bridge with Commentary Creator(s) : Hartle, Raymond A.;Wilson, Kenneth E.;Amrhein, William A.;Zang, Scott D.;Bouscher, Justin W.;Volle, Laura E.; Corporate Creator(s) : Michael Baker Jr., Inc. Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration;National Highway Institute (U.S.); Contributor(s) : Saad, Thomas;Ibrahim, Firas I. Sheikh; Published Date : 2003-12-01 Report Number : FHWA-NHI-04-041 URL : https://rosap.ntl.bts.gov/view/dot/92896
Hartle, Raymond A. et al. (2003). LRFD Design Example for Steel Girder Superstructure Bridge with Commentary.

Hartle, Raymond A. et al. "LRFD Design Example for Steel Girder Superstructure Bridge with Commentary" (2003)

Hartle, Raymond A. et al. "LRFD Design Example for Steel Girder Superstructure Bridge with Commentary" , 2003
Export RIS Citation Information. TY - Tech Report AU - Hartle, Raymond A. AU - Wilson, Kenneth E. AU - Amrhein, William A. AU - Zang, Scott D. AU - Bouscher, Justin W. AU - Volle, Laura E. A2 - Michael Baker Jr., Inc. A3 - United States. Department of Transportation. Federal Highway Administration A3 - National Highway Institute (U.S.) A4 - Saad, Thomas A4 - Ibrahim, Firas I. Sheikh A4 - Saad, Thomas K. AB - This document consists of a comprehensive steel girder bridge design example, with instructional commentary based on the AASHTO LRFD Bridge Design Specifications (Second Edition, 1998, including interims for 1999 through 2002). The design example and commentary are intended to serve as a guide to aid bridge design engineers with the implementation of the AASHTO LRFD Bridge Design Specifications, and is offered in both US Customary Units and Standard International Units. This project includes a detailed outline and a series of flowcharts that serve as the basis for the design example. The design example includes detailed design computations for the following bridge features: concrete deck, steel plate girder, bolted field splice, shear connectors, bearing stiffeners, welded connections, elastomeric bearing, cantilever abutment and wingwall, hammerhead pier, and pile foundations. To make this reference user-friendly, the numbers and titles of the design steps are consistent between the detailed outline, the flowcharts, and the design example. In addition to design computations, the design example also includes many tables and figures to illustrate the various design procedures and many AASHTO references. AASHTO references are presented in a dedicated column in the right margin of each page, immediately adjacent to the corresponding design procedure. The design example also includes commentary to explain the design logic in a user-friendly way. Additionally, tip boxes are used throughout the design example computations to present useful information, common practices, and rules of thumb for the bridge designer. Tips do not explain what must be done based on the design specifications; rather, they present suggested alternatives for the designer to consider. A figure is generally provided at the end of each design step, summarizing the design results for that particular bridge element. The analysis that served as the basis for this design example was performed using the AASHTO Opis software. A sample input file and selected excerpts from the corresponding output file are included in this document. AN - dot:92896 ET - Final Submission KW - Bridge design KW - Girders KW - Steel bridges KW - Load and resistance factor design KW - Bridge decks LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2003-12-01 SN - FHWA-NHI-04-041 TI - LRFD Design Example for Steel Girder Superstructure Bridge with Commentary M3 - Tech Report N1 - United States N1 - DTFH61-02-D-63001 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92896 ER - DB - ROSA P
Tidal Hydrology, Hydraulics and Scour at Bridges, First Edition

Zevenbergen, L. W. ;

Lagasse, Peter F. (Peter Frederick)

2004-12-01 | PDF

The purpose of this manual is to provide guidance on hydraulic modeling for bridges over tidal waterways. This document includes descriptions of: (1) common physical features that affect transportation projects in coastal areas, (2) tide causing astronomical and hydrologic processes, (3) approaches for determining hydraulic conditions for bridges i ...

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Title : Tidal Hydrology, Hydraulics and Scour at Bridges, First Edition Creator(s) : Zevenbergen, L. W.;Lagasse, Peter F. (Peter Frederick);Edge, B. L.; Corporate Creator(s) : Ayres Associates Corporate Contributor(s) : United States. Federal Highway Administration. Office of Bridge Technology;National Highway Institute (U.S.); Contributor(s) : Arneson, Larry Published Date : 2004-12-01 Report Number : FHWA-NHI-05-077 URL : https://rosap.ntl.bts.gov/view/dot/92895
Zevenbergen, L. W. et al. (2004). Tidal Hydrology, Hydraulics and Scour at Bridges, First Edition.

Zevenbergen, L. W. and Lagasse, Peter F. (Peter Frederick) and Edge, B. L. "Tidal Hydrology, Hydraulics and Scour at Bridges, First Edition" (2004)

Zevenbergen, L. W. et al. "Tidal Hydrology, Hydraulics and Scour at Bridges, First Edition" , 2004
Export RIS Citation Information. TY - Tech Report AU - Zevenbergen, L. W. AU - Lagasse, Peter F. (Peter Frederick) AU - Edge, B. L. A2 - Ayres Associates A3 - United States. Federal Highway Administration. Office of Bridge Technology A3 - National Highway Institute (U.S.) A4 - Arneson, Larry A4 - Arneson, Larry AB - The purpose of this manual is to provide guidance on hydraulic modeling for bridges over tidal waterways. This document includes descriptions of: (1) common physical features that affect transportation projects in coastal areas, (2) tide causing astronomical and hydrologic processes, (3) approaches for determining hydraulic conditions for bridges in tidal waterways, (4) applying the hydraulic analysis results to provide scour estimates. By using the methods in this manual, better predictions of bridge hydraulics and scour in tidal waterways will result. In many cases, simplified tidal hydraulic methods will provide adequate results. However, when the simplified methods yield overly conservative results, use of the recommended modeling approaches will provide more realistic predictions and hydraulic variables and scour. AN - dot:92895 KW - Tidal currents KW - Hydraulics KW - Scour KW - Coastal engineering KW - Bridges LA - English PB - United States. Federal Highway Administration. Office of Bridge Technology PY - 2004-12-01 SN - FHWA-NHI-05-077 TI - Tidal Hydrology, Hydraulics and Scour at Bridges, First Edition M3 - Tech Report N1 - United States N1 - DTFH61-01-P-00477 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92895 ER - DB - ROSA P
Accelerated Innovation Deployment (Aid) Demonstration Project: Testing, Performance Evaluation, and Documentation of the Little Silver Creek Bridge

Abu-Hawash, Ahmad

;

Deng, Yaohua "Jimmy"

2018-08-01 | PDF

The objective of this project is to evaluate the performance of a second-generation accelerated bridge construction (ABC) bridge that utilizes two types of continuity connections: the transverse joint at pier diaphragms and the longitudinal joint between precast superstructure/deck units. The bridge replacement project located on IA 92 over Little ...

08/10/2026

Supporting Files

Title : Accelerated Innovation Deployment (Aid) Demonstration Project: Testing, Performance Evaluation, and Documentation of the Little Silver Creek Bridge Creator(s) : Abu-Hawash, Ahmad;Deng, Yaohua "Jimmy";Putz, Andrew;Phares, Brent; Corporate Creator(s) : Iowa State University. Bridge Engineering Center Corporate Contributor(s) : United States. Federal Highway Administration. Accelerated Innovation Deployment;Iowa. Department of Transportation; Published Date : 2018-08-01 URL : https://rosap.ntl.bts.gov/view/dot/92894
Abu-Hawash, Ahmad et al. (2018). Accelerated Innovation Deployment (Aid) Demonstration Project: Testing, Performance Evaluation, and Documentation of the Little Silver Creek Bridge.

Abu-Hawash, Ahmad et al. "Accelerated Innovation Deployment (Aid) Demonstration Project: Testing, Performance Evaluation, and Documentation of the Little Silver Creek Bridge" (2018)

Abu-Hawash, Ahmad et al. "Accelerated Innovation Deployment (Aid) Demonstration Project: Testing, Performance Evaluation, and Documentation of the Little Silver Creek Bridge" , 2018
Export RIS Citation Information. TY - Tech Report AU - Abu-Hawash, Ahmad AU - Deng, Yaohua "Jimmy" AU - Putz, Andrew AU - Phares, Brent A2 - Iowa State University. Bridge Engineering Center A3 - United States. Federal Highway Administration. Accelerated Innovation Deployment A3 - Iowa. Department of Transportation AB - The objective of this project is to evaluate the performance of a second-generation accelerated bridge construction (ABC) bridge that utilizes two types of continuity connections: the transverse joint at pier diaphragms and the longitudinal joint between precast superstructure/deck units. The bridge replacement project located on IA 92 over Little Silver Creek in Pottawattamie County, Iowa was used to demonstrate a second-generation ABC technique that had been previously used in Iowa. As a part of the holistic evaluation, the performance of an ultra-high performance concrete (UHPC) longitudinal joint detail and a high-performance material (HPM) transverse joint detail were studied through laboratory testing and numerical simulations. Additionally, field testing was conducted to evaluate the in-place integrity of the bridge. The goals of this project are to demonstrate the performance and benefits of the ABC techniques using prefabricated bridge elements and systems (PBES) and HPMs and to contribute toward increased adoption of the technologies by Iowa and other states. Through this project, the Iowa DOT gained valuable insights into the innovative ABC techniques used. The following were some of the lessons learned:• UHPC is an excellent material for longitudinal closure pour connections.• There may not be a need to use a compression block for the beam-to-beam transverse closure pours on a similar ABC project in the future.• The UHPC longitudinal joints and the HPC transverse joints at the pier location are sufficient for the modular bridge systems of ABC projects. AN - dot:92894 ET - Final Report KW - Accelerated bridge construction KW - Joints KW - Longitudinal joints KW - Transverse joints KW - Ultra high performance concrete KW - Testing KW - Performance evaluations KW - bridge replacement KW - longitudinal bridge connections KW - transverse bridge connections LA - English PB - Iowa Department of Transportation PY - 2018-08-01 TI - Accelerated Innovation Deployment (Aid) Demonstration Project: Testing, Performance Evaluation, and Documentation of the Little Silver Creek Bridge M3 - Tech Report N1 - United States N1 - InTrans Project 14-524 UR - https://rosap.ntl.bts.gov/view/dot/92894 ER - DB - ROSA P
Track Geometry Predictions Using Point and Segment Processing [Research Results]

Baillargeon, Jay ;

Thompson, Hugh

2026-07-01 | PDF

This report presents the results of the literature review and the initial investigation into the most appropriate methods for forecasting foot-by-foot track geometry data. Point processing with the SARIMAX model and segment processing with Meta's Prophet model both produced accurate forecasts for these data. Adding exogenous variables to both model ...

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Title : Track Geometry Predictions Using Point and Segment Processing [Research Results] Creator(s) : Baillargeon, Jay;Thompson, Hugh; Corporate Creator(s) : United States. Department of Transportation. Federal Railroad Administration Published Date : 2026-07-01 Report Number : RR 26-01 URL : https://rosap.ntl.bts.gov/view/dot/92893
Baillargeon, Jay and Thompson, Hugh (2026). Track Geometry Predictions Using Point and Segment Processing [Research Results].

Baillargeon, Jay and Thompson, Hugh "Track Geometry Predictions Using Point and Segment Processing [Research Results]" (2026)

Baillargeon, Jay and Thompson, Hugh "Track Geometry Predictions Using Point and Segment Processing [Research Results]" , 2026
Export RIS Citation Information. TY - Brief AU - Baillargeon, Jay AU - Thompson, Hugh A2 - United States. Department of Transportation. Federal Railroad Administration AB - This report presents the results of the literature review and the initial investigation into the most appropriate methods for forecasting foot-by-foot track geometry data. Point processing with the SARIMAX model and segment processing with Meta's Prophet model both produced accurate forecasts for these data. Adding exogenous variables to both models to account for unexpected track maintenance between measurements significantly improved the predictions. Using these models, along with frequent Autonomous Track Geometry Measurement System (ATGMS) measurements, can accurately predict the future behavior of track geometry and help plan preventive maintenance more effectively. Case studies applying these methods will be completed as the next step in this research. AN - dot:92893 ET - Research Results KW - Predictive models KW - Forecasting KW - Time series KW - Descriptive statistics KW - Railroad tracks KW - ARIMA KW - Prophet LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026-07-01 SN - RR 26-01 TI - Track Geometry Predictions Using Point and Segment Processing [Research Results] M3 - Brief N1 - United States N1 - 693JJ6-20-F000090 UR - https://rosap.ntl.bts.gov/view/dot/92893 ER - DB - ROSA P
Positive Train Control (PTC) Reliability, Availability, and Maintainability (RAM) Study - Phase 2

Vieira, Paulo

;

Brosseau, Joseph

2026-07-29 | PDF

Between September 2018 and November 2021, the Federal Railroad Administration (FRA) sponsored a research team from Transportation Technology Center, Inc. (TTCI), now MxV Rail, to investigate and address areas of Reliability, Availability, and Maintainability (RAM) that are critical to the long-term sustainability and operation of Positive Train Con ...

08/10/2026

Title : Positive Train Control (PTC) Reliability, Availability, and Maintainability (RAM) Study - Phase 2 Creator(s) : Vieira, Paulo;Brosseau, Joseph;Polivka, Alan;Rosales-Yepez, Jose; Corporate Creator(s) : Transportation Technology Center, Inc. Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology Published Date : 2026-07-29 Report Number : DOT/FRA/ORD-26/09 URL : https://rosap.ntl.bts.gov/view/dot/92892
Vieira, Paulo et al. (2026). Positive Train Control (PTC) Reliability, Availability, and Maintainability (RAM) Study - Phase 2.

Vieira, Paulo et al. "Positive Train Control (PTC) Reliability, Availability, and Maintainability (RAM) Study - Phase 2" (2026)

Vieira, Paulo et al. "Positive Train Control (PTC) Reliability, Availability, and Maintainability (RAM) Study - Phase 2" , 2026
Export RIS Citation Information. TY - Tech Report AU - Vieira, Paulo AU - Brosseau, Joseph AU - Polivka, Alan AU - Rosales-Yepez, Jose A2 - Transportation Technology Center, Inc. A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology AB - Between September 2018 and November 2021, the Federal Railroad Administration (FRA) sponsored a research team from Transportation Technology Center, Inc. (TTCI), now MxV Rail, to investigate and address areas of Reliability, Availability, and Maintainability (RAM) that are critical to the long-term sustainability and operation of Positive Train Control (PTC) systems. Although today's PTC systems provide safety benefits, they can significantly impact railroad operations when they stop or slow trains unnecessarily. The research team developed methods and tools to analyze and quantify the negative impact of PTC-related events and applied them to data collected from actual PTC operations to produce RAM growth recommendations. AN - dot:92892 ET - Final Report KW - Positive train control KW - Automatic train control KW - Railroad operations KW - Reliability KW - Systems availability KW - Maintenance KW - Reliability, Availability and Maintainability [RAM] LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026-07-29 SN - DOT/FRA/ORD-26/09 TI - Positive Train Control (PTC) Reliability, Availability, and Maintainability (RAM) Study - Phase 2 M3 - Tech Report N1 - United States N1 - DTFR5311D00008L UR - https://rosap.ntl.bts.gov/view/dot/92892 ER - DB - ROSA P
Concrete Overlay on I-35 Forest Lake, MN: Summary Report

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements

2018-07-01 | PDF

The Federal Highway Administration (FHWA) Mobile Concrete Trailer (MCT) visited the concrete overlay project over I-35 in Forest Lake, MN from July 16 through 26 at the request of Maria Masten with the Minnesota Department of Transportation. The objective of the MCT visit was to demonstrate innovative technologies currently in the implementation ph ...

08/10/2026

Title : Concrete Overlay on I-35 Forest Lake, MN: Summary Report Corporate Creator(s) : United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements Published Date : 2018-07-01 Report Number : FHWA MCT Project # MN1803 URL : https://rosap.ntl.bts.gov/view/dot/92891
United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements (2018). Concrete Overlay on I-35 Forest Lake, MN: Summary Report.

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements "Concrete Overlay on I-35 Forest Lake, MN: Summary Report" (2018)

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements "Concrete Overlay on I-35 Forest Lake, MN: Summary Report" , 2018
Export RIS Citation Information. TY - Tech Report A2 - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements AB - The Federal Highway Administration (FHWA) Mobile Concrete Trailer (MCT) visited the concrete overlay project over I-35 in Forest Lake, MN from July 16 through 26 at the request of Maria Masten with the Minnesota Department of Transportation. The objective of the MCT visit was to demonstrate innovative technologies currently in the implementation phase; this is in conjunction with the work being done on this project using FHWA Performance Engineered Mixtures Implementation Incentive funding. This report summarizes the test results, observations, and other activities conducted during this visit. Numerical values of the test results are presented in the Appendix. AN - dot:92891 KW - Concrete pavements KW - Concrete overlays KW - Engineered materials KW - Technological innovations KW - Paving LA - English PB - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements PY - 2018-07-01 SN - FHWA MCT Project # MN1803 TI - Concrete Overlay on I-35 Forest Lake, MN: Summary Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92891 ER - DB - ROSA P
Development of Steel Design Details and Selection Criteria for Cost-Effective and Innovative Steel Bridges in Colorado

van de Lindt, John W. ;

Stone, Alexander J.

2008-12-01 | PDF

In recent years, prestressed concrete bridges have dominated the bridge type selection processes in Colorado. This can be attributed to a lack of steel mills combined with a strong presence of precast fabricators in the region. In addition, a lack of readily available economical and innovative procedures to design and construct steel bridges has hi ...

08/10/2026

Title : Development of Steel Design Details and Selection Criteria for Cost-Effective and Innovative Steel Bridges in Colorado Creator(s) : van de Lindt, John W.;Stone, Alexander J.;Chen, Suren; Corporate Creator(s) : Colorado State University. Department of Civil Engineering Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2008-12-01 Report Number : CDOT-2008-12 URL : https://rosap.ntl.bts.gov/view/dot/92890
van de Lindt, John W. et al. (2008). Development of Steel Design Details and Selection Criteria for Cost-Effective and Innovative Steel Bridges in Colorado.

van de Lindt, John W. and Stone, Alexander J. and Chen, Suren "Development of Steel Design Details and Selection Criteria for Cost-Effective and Innovative Steel Bridges in Colorado" (2008)

van de Lindt, John W. et al. "Development of Steel Design Details and Selection Criteria for Cost-Effective and Innovative Steel Bridges in Colorado" , 2008
Export RIS Citation Information. TY - Tech Report AU - van de Lindt, John W. AU - Stone, Alexander J. AU - Chen, Suren A2 - Colorado State University. Department of Civil Engineering A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - In recent years, prestressed concrete bridges have dominated the bridge type selection processes in Colorado. This can be attributed to a lack of steel mills combined with a strong presence of precast fabricators in the region. In addition, a lack of readily available economical and innovative procedures to design and construct steel bridges has hindered the industry in certain areas such as Colorado. During this research it was identified that designing steel girders as simply supported for the non composite dead loads and continuous for composite dead loads and live loads would provide economy. A preliminary girder selection software was created using this design procedure. The software takes user inputted data, such as span length, width, number of girders along with various other design inputs, and displays the lightest wide flange beam size that would support the loads using AASHTO LRFD Design Specifications. Using the girder selection software, design charts and tables were created to outline structural steel weight to span length and number of girders. AN - dot:92890 ET - Final Report KW - Steel bridges KW - Girders KW - Flanges KW - Beams KW - Composite materials KW - Loads KW - Live loads KW - Static loads KW - Data collection KW - Cost effectiveness KW - Materials selection KW - Innovation KW - steel girders KW - simple made continuous steel bridges KW - wide flange beams LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2008-12-01 SN - CDOT-2008-12 TI - Development of Steel Design Details and Selection Criteria for Cost-Effective and Innovative Steel Bridges in Colorado M3 - Tech Report N1 - United States N1 - 81.30 UR - https://rosap.ntl.bts.gov/view/dot/92890 ER - DB - ROSA P
US 20 Expansion Holstein, IA: Summary Report

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements

2018-07-01 | PDF

The Federal Highway Administration (FHWA) Mobile Concrete Trailer (MCT) visited the US-20 expansion project in Holstein, IA from July 8 to 13 and July 29 to Aug 3 at the request of Todd Hanson with the Iowa Department of Transportation. The objective of the MCT visit was to demonstrate innovative technologies currently in the implementation phase; ...

08/10/2026

Title : US 20 Expansion Holstein, IA: Summary Report Corporate Creator(s) : United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements Published Date : 2018-07-01 Report Number : FHWA MCT Project # IA1802 URL : https://rosap.ntl.bts.gov/view/dot/92889
United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements (2018). US 20 Expansion Holstein, IA: Summary Report.

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements "US 20 Expansion Holstein, IA: Summary Report" (2018)

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements "US 20 Expansion Holstein, IA: Summary Report" , 2018
Export RIS Citation Information. TY - Tech Report A2 - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements AB - The Federal Highway Administration (FHWA) Mobile Concrete Trailer (MCT) visited the US-20 expansion project in Holstein, IA from July 8 to 13 and July 29 to Aug 3 at the request of Todd Hanson with the Iowa Department of Transportation. The objective of the MCT visit was to demonstrate innovative technologies currently in the implementation phase; this is in conjunction with the work being done on this project using FHWA Performance Engineered Mixtures (PEM) Implementation Incentive funding. The MCT Open House was conducted in coordination with the PEM presentation and the event was very well attended. The Iowa Concrete Paving Association (ICPA) and the National Concrete Pavement Technology Center assisted with this event. This report summarizes the test results, observations, and other activities conducted during this visit. Numerical values of the test results are presented in the Appendix. AN - dot:92889 KW - Concrete pavements KW - Concrete tests KW - Engineered materials KW - Technological innovations KW - Paving LA - English PB - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements PY - 2018-07-01 SN - FHWA MCT Project # IA1802 TI - US 20 Expansion Holstein, IA: Summary Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92889 ER - DB - ROSA P
I-70 Reconstruction Grainfield, KS: Summary Report

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements

2019-08-01 | PDF

The Federal Highway Administration (FHWA) Mobile Concrete Technology Center (MCTC) visited the I-70 pavement replacement project in Grainfield, Kansas from July 29 to August 8, 2019. The objective of the MCTC visit was to demonstrate innovative technologies currently in the implementation phase; this site visit is in conjunction with monitoring and ...

08/10/2026

Title : I-70 Reconstruction Grainfield, KS: Summary Report Corporate Creator(s) : United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements Published Date : 2019-08-01 Report Number : FHWA MCTC Project # KS1905 URL : https://rosap.ntl.bts.gov/view/dot/92888
United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements (2019). I-70 Reconstruction Grainfield, KS: Summary Report.

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements "I-70 Reconstruction Grainfield, KS: Summary Report" (2019)

United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements "I-70 Reconstruction Grainfield, KS: Summary Report" , 2019
Export RIS Citation Information. TY - Tech Report A2 - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements AB - The Federal Highway Administration (FHWA) Mobile Concrete Technology Center (MCTC) visited the I-70 pavement replacement project in Grainfield, Kansas from July 29 to August 8, 2019. The objective of the MCTC visit was to demonstrate innovative technologies currently in the implementation phase; this site visit is in conjunction with monitoring and testing work being done on this project using FHWA Performance Engineered Mixtures (PEM) Implementation Incentive funding. During this visit, the MCTC conducted a PEM Open House on August 8, 2019 in coordination with the National Concrete Pavement Technology Center (CP Tech Center), and Todd LaTorella of the Missouri-Kansas Concrete Paving Association. A planned companion workshop titled "Ensuring Quality in the Concrete Paving Process" has been deferred until in-person training events can be held. This report summarizes the test results, observations, and other activities conducted during this visit. Numerical values of the test results are presented in the Appendices. AN - dot:92888 KW - Concrete pavements KW - Concrete tests KW - Engineered materials KW - Technological innovations KW - Paving LA - English PB - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements PY - 2019-08-01 SN - FHWA MCTC Project # KS1905 TI - I-70 Reconstruction Grainfield, KS: Summary Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/92888 ER - DB - ROSA P

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