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Showing 601 - 700 of 721 results

Identification Techniques to Reduce Confusion Between Taxiways and Adjacent Runways

Patterson, James W. ;

Frierson, Renee

2007-09-01 | PDF

The National Transportation Safety Board accident/incident database and the Aviation Safety Reporting System have reported pilots mistakenly landing on the taxiways adjacent to runways. As of August 23, 2007, 267 such events have occurred at 110 airports in the United States. These inadvertent landings create a safety hazard that must be eliminated ...

04/27/2026

Title : Identification Techniques to Reduce Confusion Between Taxiways and Adjacent Runways Creator(s) : Patterson, James W.;Frierson, Renee; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2007-09-01 Report Number : DOT/FAA/AR-TN07/54 URL : https://rosap.ntl.bts.gov/view/dot/90206 Patterson, James W. and Frierson, Renee (2007). Identification Techniques to Reduce Confusion Between Taxiways and Adjacent Runways. Patterson, James W. and Frierson, Renee "Identification Techniques to Reduce Confusion Between Taxiways and Adjacent Runways" (2007) Patterson, James W. and Frierson, Renee "Identification Techniques to Reduce Confusion Between Taxiways and Adjacent Runways" , 2007 Export RIS Citation Information. TY - Tech Report AU - Patterson, James W. AU - Frierson, Renee A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - The National Transportation Safety Board accident/incident database and the Aviation Safety Reporting System have reported pilots mistakenly landing on the taxiways adjacent to runways. As of August 23, 2007, 267 such events have occurred at 110 airports in the United States. These inadvertent landings create a safety hazard that must be eliminated. This technical note provides guidance on techniques that can be implemented at airports to reduce or eliminate this problem. Two scenarios were considered during this research effort: (1) prevent the pilot from inadvertently lining up with the taxiway during the approach, and (2) prevent the pilot from landing on the taxiway if the first effort fails. Four visual aid enhancements were tested at Seattle-Tacoma International Airport and Palm Beach International Airport: an elevated lighted X, artificial turf, omnidirectional runway end identifier lights, and an in-pavement lighted X. Each piece of equipment was placed on the taxiway and was evaluated one at a time while making final approaches to the runway with the exception of the artificial turf and omnidirectional lights, which were turned on constantly. Based on the results, it was concluded that an elevated lighted X and an in-pavement lighted X were seen at an average distance of 4.5 nm. Omnidirectional lights and green artificial turf were seen at a distance of 5.0 nm. AN - dot:90206 ET - Technical Notes KW - Airport runways KW - Approach KW - Aviation safety KW - Lighting KW - Parallel runways KW - Road markings KW - Taxiways KW - Turf KW - Palm Beach International Airport KW - Seattle-Tacoma International Airport LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-09-01 SN - DOT/FAA/AR-TN07/54 TI - Identification Techniques to Reduce Confusion Between Taxiways and Adjacent Runways M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90206 ER -
Discussion of Approaches to Estimate the Aircraft Stopping Distances Under Standard Operating Procedures

Cheng, Andrew

2007-05-01 | PDF

The Federal Aviation Administration is currently engaged in research of aircraft operational landing performance, aiming to increase the safety and efficiency of aircraft operations in terminal areas. One of the primary research objectives was to identify the operational landing distances achieved in line operations under standard operating procedu ...

04/27/2026

Title : Discussion of Approaches to Estimate the Aircraft Stopping Distances Under Standard Operating Procedures Creator(s) : Cheng, Andrew Corporate Creator(s) : Hi-Tec Systems Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2007-05-01 Report Number : DOT/FAA/AR-TN07/21 URL : https://rosap.ntl.bts.gov/view/dot/90205 Cheng, Andrew (2007). Discussion of Approaches to Estimate the Aircraft Stopping Distances Under Standard Operating Procedures. Cheng, Andrew "Discussion of Approaches to Estimate the Aircraft Stopping Distances Under Standard Operating Procedures" (2007) Cheng, Andrew "Discussion of Approaches to Estimate the Aircraft Stopping Distances Under Standard Operating Procedures" , 2007 Export RIS Citation Information. TY - Tech Report AU - Cheng, Andrew A2 - Hi-Tec Systems A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development A4 - Hackler, Larry AB - The Federal Aviation Administration is currently engaged in research of aircraft operational landing performance, aiming to increase the safety and efficiency of aircraft operations in terminal areas. One of the primary research objectives was to identify the operational landing distances achieved in line operations under standard operating procedures. The landing distance is defined as the total distance, from the runway threshold, needed for an aircraft to make a full stop during a landing operation. This distance consists of two components: the touchdown point (i.e., airborne distance) from runway threshold and the stopping distance after touchdown. Although several algorithms have been recently developed to identify aircraft touchdown points via available landing parameters, solutions to adequately determine the aircraft stopping distance are still greatly sought after. This technical note addresses the difficulties of estimating the operational aircraft stopping distance and discusses approaches to resolve the problem. In particular, a new method is proposed to estimate the aircraft stopping distance via studying the deceleration pattern during rollout. The deceleration pattern provides a useful means to estimate the operational stopping distance since it is the realization of a pilot’s decision and command under the specific landing conditions, including the piloting techniques, weather conditions, runway situation, air traffic control demands, etc. There are several advantages to this approach. First, the deceleration pattern identified by ground speed information contains relatively little contamination of measurement noise so that a troublesome noise-filtering process is generally not required. Second, this approach is simple and straightforward because it does not depend on the availability of additional information regarding external factors that affect the deceleration performances. Assumptions and investigation results are demonstrated with operational landing examples. AN - dot:90205 ET - Technical Notes KW - Landing fields KW - Stopping distances KW - Aviation KW - Terminal operations KW - Deceleration KW - Airport operations LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-05-01 SN - DOT/FAA/AR-TN07/21 TI - Discussion of Approaches to Estimate the Aircraft Stopping Distances Under Standard Operating Procedures M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90205 ER -
Massachusetts: Highway Safety Improvement Program 2017 Annual Report

Massachusetts. Department of Transportation

2017-10-20 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Massachusetts: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Massachusetts. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-20 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90204 Massachusetts. Department of Transportation (2017). Massachusetts: Highway Safety Improvement Program 2017 Annual Report. Massachusetts. Department of Transportation "Massachusetts: Highway Safety Improvement Program 2017 Annual Report" (2017) Massachusetts. Department of Transportation "Massachusetts: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Massachusetts. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90204 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-20 T2 - Highway Safety Improvement Program Annual Reports TI - Massachusetts: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90204 ER -
Maryland: Highway Safety Improvement Program 2017 Annual Report

Maryland. Department of Transportation

2017-11-01 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Maryland: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Maryland. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-01 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90203 Maryland. Department of Transportation (2017). Maryland: Highway Safety Improvement Program 2017 Annual Report. Maryland. Department of Transportation "Maryland: Highway Safety Improvement Program 2017 Annual Report" (2017) Maryland. Department of Transportation "Maryland: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Maryland. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90203 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-01 T2 - Highway Safety Improvement Program Annual Reports TI - Maryland: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90203 ER -
Maine: Highway Safety Improvement Program 2017 Annual Report

Maine. Department of Transportation

2017-11-02 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Maine: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Maine. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-02 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90202 Maine. Department of Transportation (2017). Maine: Highway Safety Improvement Program 2017 Annual Report. Maine. Department of Transportation "Maine: Highway Safety Improvement Program 2017 Annual Report" (2017) Maine. Department of Transportation "Maine: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Maine. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90202 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-02 T2 - Highway Safety Improvement Program Annual Reports TI - Maine: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90202 ER -
Louisiana: Highway Safety Improvement Program 2017 Annual Report

Louisiana. Department of Transportation and Development

2017-10-30 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Louisiana: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Louisiana. Department of Transportation and Development Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-30 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90201 Louisiana. Department of Transportation and Development (2017). Louisiana: Highway Safety Improvement Program 2017 Annual Report. Louisiana. Department of Transportation and Development "Louisiana: Highway Safety Improvement Program 2017 Annual Report" (2017) Louisiana. Department of Transportation and Development "Louisiana: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Louisiana. Department of Transportation and Development A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90201 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-30 T2 - Highway Safety Improvement Program Annual Reports TI - Louisiana: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90201 ER -
Kentucky: Highway Safety Improvement Program 2017 Annual Report

Kentucky. Transportation Cabinet

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Kentucky: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Kentucky. Transportation Cabinet Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90200 Kentucky. Transportation Cabinet (2017). Kentucky: Highway Safety Improvement Program 2017 Annual Report. Kentucky. Transportation Cabinet "Kentucky: Highway Safety Improvement Program 2017 Annual Report" (2017) Kentucky. Transportation Cabinet "Kentucky: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Kentucky. Transportation Cabinet A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90200 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Kentucky: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90200 ER -
Kansas: Highway Safety Improvement Program 2017 Annual Report

Kansas. Department of Transportation

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Kansas: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Kansas. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90199 Kansas. Department of Transportation (2017). Kansas: Highway Safety Improvement Program 2017 Annual Report. Kansas. Department of Transportation "Kansas: Highway Safety Improvement Program 2017 Annual Report" (2017) Kansas. Department of Transportation "Kansas: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Kansas. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90199 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Kansas: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90199 ER -
Iowa: Highway Safety Improvement Program 2017 Annual Report

Iowa. Department of Transportation

2017-10-25 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Iowa: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Iowa. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-25 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90198 Iowa. Department of Transportation (2017). Iowa: Highway Safety Improvement Program 2017 Annual Report. Iowa. Department of Transportation "Iowa: Highway Safety Improvement Program 2017 Annual Report" (2017) Iowa. Department of Transportation "Iowa: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Iowa. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90198 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-25 T2 - Highway Safety Improvement Program Annual Reports TI - Iowa: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90198 ER -
Indiana: Highway Safety Improvement Program 2017 Annual Report

Indiana. Department of Transportation

2017-11-03 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Indiana: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Indiana. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-03 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90197 Indiana. Department of Transportation (2017). Indiana: Highway Safety Improvement Program 2017 Annual Report. Indiana. Department of Transportation "Indiana: Highway Safety Improvement Program 2017 Annual Report" (2017) Indiana. Department of Transportation "Indiana: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Indiana. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90197 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-03 T2 - Highway Safety Improvement Program Annual Reports TI - Indiana: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90197 ER -
Illinois: Highway Safety Improvement Program 2017 Annual Report

Illinois. Department of Transportation

2017-10-30 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Illinois: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Illinois. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-30 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90196 Illinois. Department of Transportation (2017). Illinois: Highway Safety Improvement Program 2017 Annual Report. Illinois. Department of Transportation "Illinois: Highway Safety Improvement Program 2017 Annual Report" (2017) Illinois. Department of Transportation "Illinois: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Illinois. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90196 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-30 T2 - Highway Safety Improvement Program Annual Reports TI - Illinois: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90196 ER -
Idaho: Highway Safety Improvement Program 2017 Annual Report

Idaho. Transportation Department

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Idaho: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Idaho. Transportation Department Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90195 Idaho. Transportation Department (2017). Idaho: Highway Safety Improvement Program 2017 Annual Report. Idaho. Transportation Department "Idaho: Highway Safety Improvement Program 2017 Annual Report" (2017) Idaho. Transportation Department "Idaho: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Idaho. Transportation Department A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90195 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Idaho: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90195 ER -
Hawaii: Highway Safety Improvement Program 2017 Annual Report

Hawaii. Department of Transportation

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Hawaii: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Hawaii. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90194 Hawaii. Department of Transportation (2017). Hawaii: Highway Safety Improvement Program 2017 Annual Report. Hawaii. Department of Transportation "Hawaii: Highway Safety Improvement Program 2017 Annual Report" (2017) Hawaii. Department of Transportation "Hawaii: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Hawaii. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90194 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Hawaii: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90194 ER -
Georgia: Highway Safety Improvement Program 2017 Annual Report

Georgia. Department of Transportation

2017-10-25 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Georgia: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Georgia. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-25 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90193 Georgia. Department of Transportation (2017). Georgia: Highway Safety Improvement Program 2017 Annual Report. Georgia. Department of Transportation "Georgia: Highway Safety Improvement Program 2017 Annual Report" (2017) Georgia. Department of Transportation "Georgia: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Georgia. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90193 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-25 T2 - Highway Safety Improvement Program Annual Reports TI - Georgia: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90193 ER -
Florida: Highway Safety Improvement Program 2017 Annual Report

Florida. Department of Transportation

2017-11-01 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Florida: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Florida. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-01 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90192 Florida. Department of Transportation (2017). Florida: Highway Safety Improvement Program 2017 Annual Report. Florida. Department of Transportation "Florida: Highway Safety Improvement Program 2017 Annual Report" (2017) Florida. Department of Transportation "Florida: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Florida. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90192 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-01 T2 - Highway Safety Improvement Program Annual Reports TI - Florida: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90192 ER -
District of Columbia: Highway Safety Improvement Program 2017 Annual Report

District of Columbia. Dept. of Transportation

2017-10-20 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : District of Columbia: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : District of Columbia. Dept. of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-20 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90191 District of Columbia. Dept. of Transportation (2017). District of Columbia: Highway Safety Improvement Program 2017 Annual Report. District of Columbia. Dept. of Transportation "District of Columbia: Highway Safety Improvement Program 2017 Annual Report" (2017) District of Columbia. Dept. of Transportation "District of Columbia: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - District of Columbia. Dept. of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90191 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-20 T2 - Highway Safety Improvement Program Annual Reports TI - District of Columbia: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90191 ER -
Delaware: Highway Safety Improvement Program 2017 Annual Report

Delaware. Department of Transportation

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Delaware: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Delaware. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90190 Delaware. Department of Transportation (2017). Delaware: Highway Safety Improvement Program 2017 Annual Report. Delaware. Department of Transportation "Delaware: Highway Safety Improvement Program 2017 Annual Report" (2017) Delaware. Department of Transportation "Delaware: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Delaware. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90190 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Delaware: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90190 ER -
Connecticut: Highway Safety Improvement Program 2017 Annual Report

Connecticut. Department of Transportation

2017-10-30 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Connecticut: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Connecticut. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-30 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90189 Connecticut. Department of Transportation (2017). Connecticut: Highway Safety Improvement Program 2017 Annual Report. Connecticut. Department of Transportation "Connecticut: Highway Safety Improvement Program 2017 Annual Report" (2017) Connecticut. Department of Transportation "Connecticut: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Connecticut. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90189 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-30 T2 - Highway Safety Improvement Program Annual Reports TI - Connecticut: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90189 ER -
Colorado: Highway Safety Improvement Program 2017 Annual Report

Colorado. Department of Transportation

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Colorado: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Colorado. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90188 Colorado. Department of Transportation (2017). Colorado: Highway Safety Improvement Program 2017 Annual Report. Colorado. Department of Transportation "Colorado: Highway Safety Improvement Program 2017 Annual Report" (2017) Colorado. Department of Transportation "Colorado: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Colorado. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90188 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Colorado: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90188 ER -
California: Highway Safety Improvement Program 2017 Annual Report

California. Department of Transportation

2017-11-01 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : California: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : California. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-01 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90187 California. Department of Transportation (2017). California: Highway Safety Improvement Program 2017 Annual Report. California. Department of Transportation "California: Highway Safety Improvement Program 2017 Annual Report" (2017) California. Department of Transportation "California: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - California. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90187 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-01 T2 - Highway Safety Improvement Program Annual Reports TI - California: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90187 ER -
Arizona: Highway Safety Improvement Program 2017 Annual Report

Arizona. Department of Transportation

2017-10-31 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Arizona: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Arizona. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-31 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90186 Arizona. Department of Transportation (2017). Arizona: Highway Safety Improvement Program 2017 Annual Report. Arizona. Department of Transportation "Arizona: Highway Safety Improvement Program 2017 Annual Report" (2017) Arizona. Department of Transportation "Arizona: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Arizona. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90186 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-31 T2 - Highway Safety Improvement Program Annual Reports TI - Arizona: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90186 ER -
Alaska: Highway Safety Improvement Program 2017 Annual Report

Alaska. Department of Transportation

2017-10-30 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Alaska: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Alaska. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-30 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90185 Alaska. Department of Transportation (2017). Alaska: Highway Safety Improvement Program 2017 Annual Report. Alaska. Department of Transportation "Alaska: Highway Safety Improvement Program 2017 Annual Report" (2017) Alaska. Department of Transportation "Alaska: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Alaska. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90185 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-30 T2 - Highway Safety Improvement Program Annual Reports TI - Alaska: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90185 ER -
Alabama: Highway Safety Improvement Program 2017 Annual Report

Alabama. Department of Transportation

2017-10-30 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

04/27/2026

Title : Alabama: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Alabama. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-10-30 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90184 Alabama. Department of Transportation (2017). Alabama: Highway Safety Improvement Program 2017 Annual Report. Alabama. Department of Transportation "Alabama: Highway Safety Improvement Program 2017 Annual Report" (2017) Alabama. Department of Transportation "Alabama: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Alabama. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90184 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-10-30 T2 - Highway Safety Improvement Program Annual Reports TI - Alabama: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90184 ER -
National Airport Pavement Test Facility Construction Cycle 9 — Volume 4, Cement-Treated Permeable Base Test

Kazmee, Hasan ;

Murrell, Scott

2026-04-01 | PDF

Construction Cycle 9 (CC9) was the ninth in a series of full-scale airport pavement tests performed at FAA’s National Airport Pavement Test Facility (NAPTF), the fifth involving flexible pavements. It contained four test areas: Fatigue, Geosynthetics, Cement-Treated Permeable Base (CTPB), and Overload. This report addresses the CTPB test area, whic ...

04/23/2026

Title : National Airport Pavement Test Facility Construction Cycle 9 — Volume 4, Cement-Treated Permeable Base Test Creator(s) : Kazmee, Hasan;Murrell, Scott;Ricalde, Lia;Parsons, Timothy (Tim);Duah, Ebenezer;Brill, David R.;Offenbacker, Daniel; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport Pavement Research and Development Section;ARA, Incorporated; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Airport Engineering Division Published Date : 2026-04-01 Report Number : DOT/FAA/TC-26/16 URL : https://rosap.ntl.bts.gov/view/dot/90183 Kazmee, Hasan et al. (2026). National Airport Pavement Test Facility Construction Cycle 9 — Volume 4, Cement-Treated Permeable Base Test. Kazmee, Hasan et al. "National Airport Pavement Test Facility Construction Cycle 9 — Volume 4, Cement-Treated Permeable Base Test" (2026) Kazmee, Hasan et al. "National Airport Pavement Test Facility Construction Cycle 9 — Volume 4, Cement-Treated Permeable Base Test" , 2026 Export RIS Citation Information. TY - Tech Report AU - Kazmee, Hasan AU - Murrell, Scott AU - Ricalde, Lia AU - Parsons, Timothy (Tim) AU - Duah, Ebenezer AU - Brill, David R. AU - Offenbacker, Daniel A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport Pavement Research and Development Section A2 - ARA, Incorporated A3 - United States. Department of Transportation. Federal Aviation Administration. Airport Engineering Division A4 - Flynn, Murphy AB - Construction Cycle 9 (CC9) was the ninth in a series of full-scale airport pavement tests performed at FAA’s National Airport Pavement Test Facility (NAPTF), the fifth involving flexible pavements. It contained four test areas: Fatigue, Geosynthetics, Cement-Treated Permeable Base (CTPB), and Overload. This report addresses the CTPB test area, which consisted of two test items with the same flexible pavement structure except for different base course materials. Test item LFS-4N had a CTPB base, while control test item LFC-4S had a conventional crushed aggregate (FAA Item P-209) base. These test items were subjected to equal simulated full-scale aircraft traffic using the NAPTF test vehicle. The goal of this test was to assess the feasibility of using a CTPB layer in a standard flexible pavement structure. Data were collected through laboratory and in situ testing, visual evaluation, and embedded pavement sensors. Embedded sensors included asphalt strain gauges, thermocouples, earth pressure cells, coil sensors, and moisture sensors. Performance was tracked by monitoring surface upheaval, rutting, and surface cracking. Key performance and sensor data were compared to an earlier test, the Construction Cycle 7 (CC7) asphalt-treated permeable base (ATPB) test item at the NAPTF. Both in-place and laboratory characterization results indicated CTPB materials had substantially higher stiffness than traditional crushed aggregate bases. Cracking and surface upheaval were lower in the CTPB test item compared to the control test item. Structural performance of CTPB under full-scale traffic may be characterized as intermediate between a standard high-quality aggregate base (P-209) and a fully bound material (P-403). AN - dot:90183 ET - Final Report KW - Pavement tests KW - Flexible pavements KW - Airport runways KW - Construction KW - Permeable pavements KW - Cement KW - National Airport Pavement Test Facility KW - Cement-treated permeable base LA - English PB - United States. Department of Transportation. Federal Aviation Administration PY - 2026-04-01 SN - DOT/FAA/TC-26/16 TI - National Airport Pavement Test Facility Construction Cycle 9 — Volume 4, Cement-Treated Permeable Base Test M3 - Tech Report N1 - United States N1 - 692M15-21-D-00004 UR - https://rosap.ntl.bts.gov/view/dot/90183 ER -
BTS Transportation Probe Data Guide: Aggregate Location Based–Services (LBS), Navigation (LBS or GPS), and Point-of-Interest Data

United States. Department of Transportation. Bureau of Transportation Statistics ...

2026-04-01 | PDF

Aggregate location based–services (LBS), navigation, and point-of-interest (POI) probe data products (“aggregate products”) summarize temporal–location information that is originally collected from a probe at a finer, disaggregate spatial scale. These products are only available to end users in an aggregate format. They can rely on any form of prob ...

04/21/2026

Title : BTS Transportation Probe Data Guide: Aggregate Location Based–Services (LBS), Navigation (LBS or GPS), and Point-of-Interest Data Corporate Creator(s) : United States. Department of Transportation. Bureau of Transportation Statistics;MacroSys, LLC;WRA; Contributor(s) : Titlow, Kyle;Liu, Mindy;Strocko, Ed;Lechtenberg, Devon;Schmitt, Rolf R.;Bricka, Stacey;Chigoy, Byron T;Viswanathan, Krishnan; Published Date : 2026-04-01 DOI : https://doi.org/10.21949/f1w2-dh59 United States. Department of Transportation. Bureau of Transportation Statistics (2026). BTS Transportation Probe Data Guide: Aggregate Location Based–Services (LBS), Navigation (LBS or GPS), and Point-of-Interest Data. https://doi.org/10.21949/f1w2-dh59 United States. Department of Transportation. Bureau of Transportation Statistics "BTS Transportation Probe Data Guide: Aggregate Location Based–Services (LBS), Navigation (LBS or GPS), and Point-of-Interest Data" (2026), https://doi.org/10.21949/f1w2-dh59 United States. Department of Transportation. Bureau of Transportation Statistics "BTS Transportation Probe Data Guide: Aggregate Location Based–Services (LBS), Navigation (LBS or GPS), and Point-of-Interest Data" , 2026, https://doi.org/10.21949/f1w2-dh59 Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Bureau of Transportation Statistics A2 - MacroSys, LLC A2 - WRA A4 - Titlow, Kyle A4 - Liu, Mindy A4 - Strocko, Ed A4 - Lechtenberg, Devon A4 - Schmitt, Rolf R. A4 - Bricka, Stacey A4 - Chigoy, Byron T A4 - Viswanathan, Krishnan AB - Aggregate location based–services (LBS), navigation, and point-of-interest (POI) probe data products (“aggregate products”) summarize temporal–location information that is originally collected from a probe at a finer, disaggregate spatial scale. These products are only available to end users in an aggregate format. They can rely on any form of probe source data as long as the data come with spatiotemporal information that can be meaningfully summarized vis-à-vis a larger study area or site. As such, they depend on whichever location-detection technology was used to generate their source of probe data (e.g., LBS, connected-vehicle [CV], and Global Positioning System [GPS] data from navigation applications [apps] and platforms; synthetic data; and transaction counts tied to specific business locations). AN - dot:90182 DO - https://doi.org/10.21949/f1w2-dh59 KW - Data collection KW - Location based services KW - Spatial analysis KW - Travel patterns KW - Geographic information systems KW - Transportation KW - Markets KW - Application programming interfaces KW - Mobile applications KW - Geospatial data LA - English PB - United States. Department of Transportation. Bureau of Transportation Statistics PY - 2026-04-01 TI - BTS Transportation Probe Data Guide: Aggregate Location Based–Services (LBS), Navigation (LBS or GPS), and Point-of-Interest Data M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90182 ER -
Simulating the Distribution of Halon 1301 in an Aircraft Engine Nacelle with HFC-125

Ingerson, D. A.

1999-08-01 | PDF

The primary fire suppressant used in commercial aircraft engine nacelles and auxiliary power units is Halon 1301. The period of fire suppression system development and its certification testing may be an arduous task requiring the discharge of substantial quantities of fire suppressant. Additionally, to demonstrate compliance with federal regulatio ...

04/20/2026

Title : Simulating the Distribution of Halon 1301 in an Aircraft Engine Nacelle with HFC-125 Creator(s) : Ingerson, D. A. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-08-01 Report Number : DOT/FAA/AR-TN99/64 URL : https://rosap.ntl.bts.gov/view/dot/90181 Ingerson, D. A. (1999). Simulating the Distribution of Halon 1301 in an Aircraft Engine Nacelle with HFC-125. Ingerson, D. A. "Simulating the Distribution of Halon 1301 in an Aircraft Engine Nacelle with HFC-125" (1999) Ingerson, D. A. "Simulating the Distribution of Halon 1301 in an Aircraft Engine Nacelle with HFC-125" , 1999 Export RIS Citation Information. TY - Tech Report AU - Ingerson, D. A. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - The primary fire suppressant used in commercial aircraft engine nacelles and auxiliary power units is Halon 1301. The period of fire suppression system development and its certification testing may be an arduous task requiring the discharge of substantial quantities of fire suppressant. Additionally, to demonstrate compliance with federal regulations, engine nacelle fire suppression systems are discharged in flight or at varying conditions simulating flight. These tests are recorded and evaluated with specialized gas analysis equipment. Currently, the certification process requires releasing Halon 1301 to accomplish such approvals. Based on the Montreal Protocol and its amendments, the halon family of fire suppressants has been eliminated from production. This action is in response to the destructive capacity of halon with respect to the ozone layer within the atmosphere. his technical note describes a procedure for utilizing an ozone-friendly simulant during fire suppression system development and certification testing. It demonstrates a realistic potential to eliminate the release of Halon 1301 for purposes other than actual fire suppression. his step is perceived as an interim process to assist with the reduction of Halon 1301 release during the transition to chemicals which meet the intent of the Montreal Protocol. AN - dot:90181 ET - Technical Notes KW - Pollution control KW - Air pollution KW - Air engines KW - Certification KW - Fire extinguishing agents KW - Gas distribution KW - HFC-125 KW - Halon 1301 KW - Pentafluoroethane LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-08-01 SN - DOT/FAA/AR-TN99/64 TI - Simulating the Distribution of Halon 1301 in an Aircraft Engine Nacelle with HFC-125 M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90181 ER -
Evaluation of Oxygen Cylinder Overpacks Exposed to Elevated Temperature

Marker, Timothy R. ;

Diaz, Ricardo

1999-06-01 | PDF

Tests were conducted inside a large industrial convection furnace to determine the temperature and time required to cause pressure relief activation of three different size oxygen cylinders commonly used in commercial transport aircraft. The cylinders were first emptied of gaseous oxygen for safety reasons and refilled with nitrogen to the original ...

04/20/2026

Title : Evaluation of Oxygen Cylinder Overpacks Exposed to Elevated Temperature Creator(s) : Marker, Timothy R.;Diaz, Ricardo; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-06-01 Report Number : DOT/FAA/AR-TN98/30 URL : https://rosap.ntl.bts.gov/view/dot/90180 Marker, Timothy R. and Diaz, Ricardo (1999). Evaluation of Oxygen Cylinder Overpacks Exposed to Elevated Temperature. Marker, Timothy R. and Diaz, Ricardo "Evaluation of Oxygen Cylinder Overpacks Exposed to Elevated Temperature" (1999) Marker, Timothy R. and Diaz, Ricardo "Evaluation of Oxygen Cylinder Overpacks Exposed to Elevated Temperature" , 1999 Export RIS Citation Information. TY - Tech Report AU - Marker, Timothy R. AU - Diaz, Ricardo A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - Tests were conducted inside a large industrial convection furnace to determine the temperature and time required to cause pressure relief activation of three different size oxygen cylinders commonly used in commercial transport aircraft. The cylinders were first emptied of gaseous oxygen for safety reasons and refilled with nitrogen to the original pressure. The furnace temperature was ramped to 400°F, which represented the temperature reached during a Halon 1301 suppressed deep-seated cargo compartment fire. Cylinder pressure relief activation typically occurred after the surface temperature had reached only 300°F. AB - Additional tests were conducted using a 76.5-cubic-foot oxygen cylinder placed inside several types of cylinder cases, commonly referred to as overpacks. The overpacks were available in a variety of constructions, all for the purpose of protecting the cylinder from impact damage that may occur during shipment. The tests were run to determine the level of thermal protection, if any, that the overpacks might provide when the cylinders are subjected to elevated temperatures. Two custom-made overpacks were also tested that contained insulating materials aimed specifically at providing thermal protection. Tests showed that some common overpacks have the ability to protect the cylinder from pressure relief activation for nearly 60 minutes while other types designed specifically for thermal insulation can provide significant additional protection. AN - dot:90180 ET - Technical Notes KW - Aircraft carriers KW - Cargo compartments KW - Commercial transportation KW - Cylindrical bodies KW - High temperature KW - Nitrogen KW - Oxygen equipment KW - Pressure fields KW - Temperature sensors KW - Thermal conductivity LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-06-01 SN - DOT/FAA/AR-TN98/30 TI - Evaluation of Oxygen Cylinder Overpacks Exposed to Elevated Temperature M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90180 ER -
Effectiveness of Flight Attendants Attempting to Extinguish Fires in an Accessible Cargo Compartment

Blake, David

1999-04-01 | PDF

This technical note documents the results of a project to evaluate the ability of flight attendants to extinguish cargo fires in small Class B cargo compartments. Thirteen fire tests were conducted in a modified Shorts 330 airplane in which flight attendants attempted to extinguish cargo fires. Some of the selected test variables included the cargo ...

04/20/2026

Title : Effectiveness of Flight Attendants Attempting to Extinguish Fires in an Accessible Cargo Compartment Creator(s) : Blake, David Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-04-01 Report Number : DOT/FAA/AR-TN99/29 URL : https://rosap.ntl.bts.gov/view/dot/90179 Blake, David (1999). Effectiveness of Flight Attendants Attempting to Extinguish Fires in an Accessible Cargo Compartment. Blake, David "Effectiveness of Flight Attendants Attempting to Extinguish Fires in an Accessible Cargo Compartment" (1999) Blake, David "Effectiveness of Flight Attendants Attempting to Extinguish Fires in an Accessible Cargo Compartment" , 1999 Export RIS Citation Information. TY - Tech Report AU - Blake, David A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This technical note documents the results of a project to evaluate the ability of flight attendants to extinguish cargo fires in small Class B cargo compartments. Thirteen fire tests were conducted in a modified Shorts 330 airplane in which flight attendants attempted to extinguish cargo fires. Some of the selected test variables included the cargo compartment size, the width of the access door, the size and type of fire extinguishers available, the presence and absence of an unobstructed center aisle in the cargo compartment, the type of Protective Breathing Equipment (PBE), and the delay between the smoke detector alarm and the start of the firefighting efforts. The results of the testing indicated that in most cases the flight attendants were unable to successfully extinguish these fires. AN - dot:90179 ET - Technical Notes KW - Airplanes KW - Fires KW - Flight attendants KW - Air cargo KW - Fire extinguishers KW - Flight crews KW - Human factors engineering LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-04-01 SN - DOT/FAA/AR-TN99/29 TI - Effectiveness of Flight Attendants Attempting to Extinguish Fires in an Accessible Cargo Compartment M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90179 ER -
Beechcraft 1900C Vertical Impact Test

McGuire, Robert J. ;

Vu, Tong

1999-05-01 | PDF

In October 1995, a commuter category Beechcraft 1900C airliner was subjected to a vertical impact drop test at the William J. Hughes Technical Center, Atlantic City International Airport, New Jersey. The purpose of this test was to measure the impact response of the fuselage, cabin floor, cabin furnishings (including standard and modified seats), a ...

04/20/2026

Title : Beechcraft 1900C Vertical Impact Test Creator(s) : McGuire, Robert J.;Vu, Tong; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-05-01 Report Number : DOT/FAA/AR-TN99/25 URL : https://rosap.ntl.bts.gov/view/dot/90178 McGuire, Robert J. and Vu, Tong (1999). Beechcraft 1900C Vertical Impact Test. McGuire, Robert J. and Vu, Tong "Beechcraft 1900C Vertical Impact Test" (1999) McGuire, Robert J. and Vu, Tong "Beechcraft 1900C Vertical Impact Test" , 1999 Export RIS Citation Information. TY - Tech Report AU - McGuire, Robert J. AU - Vu, Tong A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - In October 1995, a commuter category Beechcraft 1900C airliner was subjected to a vertical impact drop test at the William J. Hughes Technical Center, Atlantic City International Airport, New Jersey. The purpose of this test was to measure the impact response of the fuselage, cabin floor, cabin furnishings (including standard and modified seats), and anthropomorphic test dummies. The test was conducted to simulate the vertical velocity component of a severe but survivable crash impact. low-wing, 19-passenger fuselage was dropped from a height of 11′2″ resulting in a vertical impact velocity of 26′8″ per second. The airframe was configured to simulate a typical flight condition, including seats (normal and experimental), simulated occupants, and cargo. e test the wings and engines were removed; the vertical and horizontal stabilizers were removed; the landing gear was removed; and the pilot and copilot seats were not installed. The data collected in the test and future tests will supplement the existing basis for improved seat and restraint systems for commuter category Code of Federal Regulation, 14 CFR Part 23, airplanes. AN - dot:90178 ET - Technical Notes KW - Airplanes KW - Commuter aircraft KW - Testing KW - Drop tests KW - Aircraft cabins KW - Dummies KW - Anthropomorphic test dummies KW - Beechcraft aircraft LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-05-01 SN - DOT/FAA/AR-TN99/25 TI - Beechcraft 1900C Vertical Impact Test M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90178 ER -
Activation of Oxygen Generators in Proximity to Combustible Materials

O'Connor, Thomas R. ;

Hagen, Eric L.

1999-05-01 | PDF

This report presents the results of a series of tests performed on oxygen generators contained in cardboard shipping containers and packing materials to witness the probability of ignition in the event one of the generators was activated. Test results indicated that in the presence of an activated generator, combustible materials will produce a fir ...

04/20/2026

Title : Activation of Oxygen Generators in Proximity to Combustible Materials Creator(s) : O'Connor, Thomas R.;Hagen, Eric L.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section;Galaxy Scientific Corporation; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-05-01 Report Number : DOT/FAA/AR-TN99/9 URL : https://rosap.ntl.bts.gov/view/dot/90177 O'Connor, Thomas R. and Hagen, Eric L. (1999). Activation of Oxygen Generators in Proximity to Combustible Materials. O'Connor, Thomas R. and Hagen, Eric L. "Activation of Oxygen Generators in Proximity to Combustible Materials" (1999) O'Connor, Thomas R. and Hagen, Eric L. "Activation of Oxygen Generators in Proximity to Combustible Materials" , 1999 Export RIS Citation Information. TY - Tech Report AU - O'Connor, Thomas R. AU - Hagen, Eric L. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A2 - Galaxy Scientific Corporation A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This report presents the results of a series of tests performed on oxygen generators contained in cardboard shipping containers and packing materials to witness the probability of ignition in the event one of the generators was activated. Test results indicated that in the presence of an activated generator, combustible materials will produce a fire. AN - dot:90177 ET - Technical Notes KW - Airplanes KW - Fires KW - Oxygen equipment KW - Ignition KW - Activation KW - Canisters KW - Carboard KW - Combustible materials KW - Combustion KW - Oxygen generators KW - Packaging KW - Packing materials KW - Position(Location) KW - Shipping containers KW - Sodium chlorate LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-05-01 SN - DOT/FAA/AR-TN99/9 TI - Activation of Oxygen Generators in Proximity to Combustible Materials M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90177 ER -
Simulator Evaluation of Land and Hold-Short Operation (LAHSO) Lighting Configurations

Katz, Eric S.

1998-12-01 | PDF

The Federal Aviation Administration (FAA) evaluated several proposed Land and Hold-Short Operation (LAHSO) lighting configurations using a flight simulator. The configurations are designed to indicate to the pilot of a landing aircraft the location of the hold-short point. Subject pilots flew approaches and takeoffs to each LAHSO configuration unde ...

04/20/2026

Title : Simulator Evaluation of Land and Hold-Short Operation (LAHSO) Lighting Configurations Creator(s) : Katz, Eric S. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1998-12-01 Report Number : DOT/FAA/AR-TN/97/86 URL : https://rosap.ntl.bts.gov/view/dot/90176 Katz, Eric S. (1998). Simulator Evaluation of Land and Hold-Short Operation (LAHSO) Lighting Configurations. Katz, Eric S. "Simulator Evaluation of Land and Hold-Short Operation (LAHSO) Lighting Configurations" (1998) Katz, Eric S. "Simulator Evaluation of Land and Hold-Short Operation (LAHSO) Lighting Configurations" , 1998 Export RIS Citation Information. TY - Tech Report AU - Katz, Eric S. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - The Federal Aviation Administration (FAA) evaluated several proposed Land and Hold-Short Operation (LAHSO) lighting configurations using a flight simulator. The configurations are designed to indicate to the pilot of a landing aircraft the location of the hold-short point. Subject pilots flew approaches and takeoffs to each LAHSO configuration under simulated visual flight rules (VFR) weather conditions and completed evaluation questionnaires. In addition to subjective questionnaire responses, pilot and aircraft performance data, such as speed at touchdown, length of rollout, etc., were recorded. The evaluation was directed specifically towards identifying which lighting pattern(s) would effectively indicate to the pilot of a landing aircraft the location of the hold-short point. Configurations containing red in-pavement and elevated holding point lights, along with pulsing-white in-pavement taxi-speed warning lights, were determined to be most appropriate for installations using control tower operation of the lights for each landing or takeoff. If air traffic control does not control the LAHSO lights, the FAA proposal of pulsing-white in-pavement lights located at the hold-short point appeared to be most appropriate. AN - dot:90176 ET - Technical Notes KW - Aircraft KW - Aircraft operations KW - Aircraft pilotage KW - Airstrips KW - Flight simulators KW - Landing KW - Landing fields KW - Lighting KW - Training simulators LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1998-12-01 SN - DOT/FAA/AR-TN/97/86 TI - Simulator Evaluation of Land and Hold-Short Operation (LAHSO) Lighting Configurations M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90176 ER -
Heats of Combustion of High-Temperature Polymers

Lyon, Richard E. ;

Hackett, Stacey M.

1998-09-01 | PDF

The heats of combustion for 47 commercial and developmental polymers of known chemical structure were determined using an oxygen bomb calorimeter according to standard methods. The experimental results were compared to thermochemical calculations of the gross heat of combustion from (1) oxygen consumption and (2) group additivity of the heats of fo ...

04/20/2026

Title : Heats of Combustion of High-Temperature Polymers Creator(s) : Lyon, Richard E.;Hackett, Stacey M.;Walters, Richard N.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section;Galaxy Scientific Corporation; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1998-09-01 Report Number : DOT/FAA/AR-TN97/8 URL : https://rosap.ntl.bts.gov/view/dot/90175 Lyon, Richard E. et al. (1998). Heats of Combustion of High-Temperature Polymers. Lyon, Richard E. and Hackett, Stacey M. and Walters, Richard N. "Heats of Combustion of High-Temperature Polymers" (1998) Lyon, Richard E. et al. "Heats of Combustion of High-Temperature Polymers" , 1998 Export RIS Citation Information. TY - Tech Report AU - Lyon, Richard E. AU - Hackett, Stacey M. AU - Walters, Richard N. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A2 - Galaxy Scientific Corporation A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - The heats of combustion for 47 commercial and developmental polymers of known chemical structure were determined using an oxygen bomb calorimeter according to standard methods. The experimental results were compared to thermochemical calculations of the gross heat of combustion from (1) oxygen consumption and (2) group additivity of the heats of formation of products and reactants. The polymers examined were thermally stable, char-forming thermoplastics and thermoset resins containing a significant degree of aromaticity and heteroatoms including nitrogen, sulfur, phosphorus, silicon, and oxygen in linear and heterocyclic structures. The gross heats of combustion calculated from polymer enthalpies of formation and oxygen consumption thermochemistry were within 4 and 5 percent, respectively, of the experimental values from oxygen bomb calorimetry. The heat released by combustion per gram of diatomic oxygen consumed in the present study was E = 13.08 ± 0.87 kJ/g-O2 for polymers which combusted completely (n = 46). This value is indistinguishable from the universal E = 13.1 kJ/g-O2 used in oxygen consumption calorimetry. AN - dot:90175 ET - Technical Notes KW - Combustion KW - Fire KW - Fire resistant materials KW - Heat KW - Heat convection KW - Ignition KW - Oxygen KW - Polymers KW - Thermochemistry KW - Thermoplastic materials LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1998-09-01 SN - DOT/FAA/AR-TN97/8 TI - Heats of Combustion of High-Temperature Polymers M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90175 ER -
Effects of Concentrated Hydrochloric Acid Spills on Aircraft Aluminum Skin

Speitel, Louise

1998-07-01 | PDF

This document describes the tests conducted to evaluate the effects of a spill of a strong corrosive acid such as hydrochloric acid (HCl) on aircraft interior skin and to determine the time required for a spill of Department of Transportation (DOT) allowable volumes and concentrations to cause catastrophic failure. Test data indicate that the epoxy ...

04/20/2026

Title : Effects of Concentrated Hydrochloric Acid Spills on Aircraft Aluminum Skin Creator(s) : Speitel, Louise Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1998-07-01 Report Number : DOT/FAA/AR-TN97/108 URL : https://rosap.ntl.bts.gov/view/dot/90174 Speitel, Louise (1998). Effects of Concentrated Hydrochloric Acid Spills on Aircraft Aluminum Skin. Speitel, Louise "Effects of Concentrated Hydrochloric Acid Spills on Aircraft Aluminum Skin" (1998) Speitel, Louise "Effects of Concentrated Hydrochloric Acid Spills on Aircraft Aluminum Skin" , 1998 Export RIS Citation Information. TY - Tech Report AU - Speitel, Louise A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This document describes the tests conducted to evaluate the effects of a spill of a strong corrosive acid such as hydrochloric acid (HCl) on aircraft interior skin and to determine the time required for a spill of Department of Transportation (DOT) allowable volumes and concentrations to cause catastrophic failure. Test data indicate that the epoxy coated interior aluminum skin is resistant to acid attack. The acid reacted vigorously with scratched skin surfaces, creating a wide hole in the skin along the scratch line. Test data also indicate that a spill of concentrated HCI can eat completely through the rivets and ribs and may result in a significant loss of structural rib strength. AN - dot:90174 ET - Technical Notes KW - Aircraft materials KW - Aircraft structural components KW - Aluminum KW - Chemical spills KW - Failure analysis KW - Hydrochloric acid LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1998-07-01 SN - DOT/FAA/AR-TN97/108 TI - Effects of Concentrated Hydrochloric Acid Spills on Aircraft Aluminum Skin M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90174 ER -
Cold Ambient Temperature Effects on Heated Fuel Tank Vapor Concentrations

Summer, Steven M.

2000-07-01 | PDF

Experiments were conducted within a simulated aircraft center wing fuel tank (CWT) to qualitatively analyze the effects of decreased ambient temperatures, such as might occur at increased altitudes, on the vapor concentrations found in a typical CWT ullage. A small quantity of fuel in the CWT test article was heated to 125°F for two hours, correspo ...

04/20/2026

Title : Cold Ambient Temperature Effects on Heated Fuel Tank Vapor Concentrations Creator(s) : Summer, Steven M. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2000-07-01 Report Number : DOT/FAA/AR-TN99/93 URL : https://rosap.ntl.bts.gov/view/dot/90173 Summer, Steven M. (2000). Cold Ambient Temperature Effects on Heated Fuel Tank Vapor Concentrations. Summer, Steven M. "Cold Ambient Temperature Effects on Heated Fuel Tank Vapor Concentrations" (2000) Summer, Steven M. "Cold Ambient Temperature Effects on Heated Fuel Tank Vapor Concentrations" , 2000 Export RIS Citation Information. TY - Tech Report AU - Summer, Steven M. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - Experiments were conducted within a simulated aircraft center wing fuel tank (CWT) to qualitatively analyze the effects of decreased ambient temperatures, such as might occur at increased altitudes, on the vapor concentrations found in a typical CWT ullage. A small quantity of fuel in the CWT test article was heated to 125°F for two hours, corresponding to a temperature of approximately 10°F above the flashpoint of the fuel. The tests were conducted at sea level (14.7 psia), however, the wall temperature of the tank was cooled to a temperature corresponding to a given altitude. AB - From these tests, it was determined that the ambient temperature does indeed have a significant effect on the vapor concentrations formed in the fuel tank ullage at small fuel mass loadings. When allowed to cool naturally to the room's ambient temperature (-75°F), the fuel-air ratio decreased at an average rate of 1.07 x 10-5 min-1 for the low-altitude test, it decreased at an average rate of 7 .50 x 10-5 min, and for intermediate- and high-altitude scenarios, it decreased at an average rate of 1.58 x 10-4 min-1 and 2.08 x 10-4 min-1, respectively. Thus, as the ambient temperature is decreased, the rate of decrease in the fuel-air ratio increases. AN - dot:90173 ET - Technical Notes KW - Flammability KW - Fuel tanks KW - Aircraft fuels KW - Atmospheric temperature KW - Altitude KW - Vapors KW - High altitude KW - Low altitude LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000-07-01 SN - DOT/FAA/AR-TN99/93 TI - Cold Ambient Temperature Effects on Heated Fuel Tank Vapor Concentrations M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90173 ER -
Mass Loading Effects on Fuel Vapor Concentrations in an Aircraft Fuel Tank Ullage

Summer, Steven M.

1999-09-01 | PDF

This report discusses experiments performed within a simulated fuel tank approximately 1/20 the size of a typical B-7 4 7 center wing fuel tank (CWT). The vapors generated within the ullage of this tank were analyzed under different mass loadings in an effort to determine the effects of the mass loading and fuel distribution. It was determined from ...

04/20/2026

Title : Mass Loading Effects on Fuel Vapor Concentrations in an Aircraft Fuel Tank Ullage Creator(s) : Summer, Steven M. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-09-01 Report Number : DOT/FAA/AR-TN99/65 URL : https://rosap.ntl.bts.gov/view/dot/90172 Summer, Steven M. (1999). Mass Loading Effects on Fuel Vapor Concentrations in an Aircraft Fuel Tank Ullage. Summer, Steven M. "Mass Loading Effects on Fuel Vapor Concentrations in an Aircraft Fuel Tank Ullage" (1999) Summer, Steven M. "Mass Loading Effects on Fuel Vapor Concentrations in an Aircraft Fuel Tank Ullage" , 1999 Export RIS Citation Information. TY - Tech Report AU - Summer, Steven M. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This report discusses experiments performed within a simulated fuel tank approximately 1/20 the size of a typical B-7 4 7 center wing fuel tank (CWT). The vapors generated within the ullage of this tank were analyzed under different mass loadings in an effort to determine the effects of the mass loading and fuel distribution. It was determined from these tests that in order to have a substantial effect on the flammability of the vapor within the CWT, the mass loading would have to be somewhere between 0.08 and 0.15 kg/m3. A substantial effect was defined as a minimum 20% decrease in the maximum hydrocarbon count when compared to the average of all tests conducted with larger mass loadings. In addition, it was found that while the distribution of the fuel has no effect on the peak flammability (vapor composition) that is reached, it does have a significant effect on how long it takes to reach the final state. The less dispersed the liquid fuel is, the longer it will take the vapor to reach its maximum flammability point. AN - dot:90172 ET - Technical Notes KW - Air transportation facilities KW - Aircraft KW - Aircraft operations KW - Aviation KW - Condensation KW - Evaporation KW - Flammability KW - Fuel tanks KW - Vapors KW - Boeing 747 aircraft KW - Concentration(Composition) KW - Dispersing KW - Hydrocarbons KW - Jet engine fuels KW - Liquid sloshing KW - Mass loading KW - Ullage LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-09-01 SN - DOT/FAA/AR-TN99/65 TI - Mass Loading Effects on Fuel Vapor Concentrations in an Aircraft Fuel Tank Ullage M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90172 ER -
Improving Traffic Signal System Planning, Design, and Management With Big-Data-Enhanced ATSPM System [Project Summary Report]

Li, Taylor

;

Mattingly, Stephen

2024-08-31 | PDF

Automated Traffic Signal Performance Measures or ATSPM represent a state-of-the-art traffic signal management solution. After over 20 years of collaboration among federal agencies, state agencies, academia, and industry, the ATSPM system is increasingly being accepted and adopted by agencies. While the ATSPM deployment is scaling up, new challenges ...

04/20/2026

Title : Improving Traffic Signal System Planning, Design, and Management With Big-Data-Enhanced ATSPM System [Project Summary Report] Creator(s) : Li, Taylor;Mattingly, Stephen;Khadka, Swastik;Wang, Peirong (Slade);Shrestha, Sijan; Corporate Creator(s) : University of Texas at Arlington Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-08-31 Report Number : 0-7160 URL : https://rosap.ntl.bts.gov/view/dot/90171 Li, Taylor et al. (2024). Improving Traffic Signal System Planning, Design, and Management With Big-Data-Enhanced ATSPM System [Project Summary Report]. Li, Taylor et al. "Improving Traffic Signal System Planning, Design, and Management With Big-Data-Enhanced ATSPM System [Project Summary Report]" (2024) Li, Taylor et al. "Improving Traffic Signal System Planning, Design, and Management With Big-Data-Enhanced ATSPM System [Project Summary Report]" , 2024 Export RIS Citation Information. TY - Brief AU - Li, Taylor AU - Mattingly, Stephen AU - Khadka, Swastik AU - Wang, Peirong (Slade) AU - Shrestha, Sijan A2 - University of Texas at Arlington A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - Automated Traffic Signal Performance Measures or ATSPM represent a state-of-the-art traffic signal management solution. After over 20 years of collaboration among federal agencies, state agencies, academia, and industry, the ATSPM system is increasingly being accepted and adopted by agencies. While the ATSPM deployment is scaling up, new challenges are surfacing. A main challenge is the increasing gap between traffic signal design and traffic signal operations. Traffic signal planning and design still follow the traditional approach instead of the new ATSPM approach due to a lack of the needed data. Once the new traffic signal timings are deployed in the field, they will receive much more extensive evaluation using the ATSPM method. Another challenge is that deploying the ATSPM system takes lots of resources even though the software may be free. This situation results in limited access to the ATSPM system among the stakeholders. Other challenges include the high demand for detectors, operational and maintenance complexities, etc. These issues will likely become hurdles for agencies to scale up their ATSPM deployment. This research aims to address the above issues to facilitate TxDOT’s stage-wide ATSPM deployment. It has achieved three goals: • Provided a practical ATSPM-In-the-Loop simulation solution to introduce the ATSPM method into the traffic signal design stage. This solution will not significantly increase project costs. • Provided a pre-deployment mechanism for stakeholders to evaluate unconventional traffic signal solutions using the ATSPM system, like adaptive, traffic signal preemptions etc. • Provide a training platform for stakeholders to explore new ATSPM solutions. AN - dot:90171 ET - Project Summary Report KW - Traffic signal controllers KW - Traffic simulation KW - Traffic data KW - Literature reviews KW - Planning and design KW - Trajectory KW - Best practices KW - ATSPM KW - traffic big data KW - ATSPM digital twin LA - English PB - Texas Department of Transportation. Research and Technology Implementation Office PY - 2024-08-31 SN - 0-7160 TI - Improving Traffic Signal System Planning, Design, and Management With Big-Data-Enhanced ATSPM System [Project Summary Report] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90171 ER -
Improving Traffic Signal System Planning, Design, and Management with Big-Data-Enhanced ATSPM System

Li, Pengfei (Taylor) ;

Mattingly, Stephen P.

2026-04-01 | PDF

In this project, an ATSPM-in-the-loop simulation framework is developed to introduce the data-driven ATSPM framework into traffic signal planning and design. Literature review on ATSPM and Best practice survey are conducted first. Then the research team explores and documents how to set up two real-world open-source ATSPM systems: Utah-DOT ATSPM sy ...

04/20/2026

Supporting Files

Title : Improving Traffic Signal System Planning, Design, and Management with Big-Data-Enhanced ATSPM System Creator(s) : Li, Pengfei (Taylor);Mattingly, Stephen P.;Wang, Peirong (Slade);Khadka, Swastik;Shrestha, Sijan; Corporate Creator(s) : University of Texas at Arlington Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-04-01 Report Number : FHWA/TX-26 URL : https://rosap.ntl.bts.gov/view/dot/90170 Li, Pengfei (Taylor) et al. (2026). Improving Traffic Signal System Planning, Design, and Management with Big-Data-Enhanced ATSPM System. Li, Pengfei (Taylor) et al. "Improving Traffic Signal System Planning, Design, and Management with Big-Data-Enhanced ATSPM System" (2026) Li, Pengfei (Taylor) et al. "Improving Traffic Signal System Planning, Design, and Management with Big-Data-Enhanced ATSPM System" , 2026 Export RIS Citation Information. TY - Tech Report AU - Li, Pengfei (Taylor) AU - Mattingly, Stephen P. AU - Wang, Peirong (Slade) AU - Khadka, Swastik AU - Shrestha, Sijan A2 - University of Texas at Arlington A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - In this project, an ATSPM-in-the-loop simulation framework is developed to introduce the data-driven ATSPM framework into traffic signal planning and design. Literature review on ATSPM and Best practice survey are conducted first. Then the research team explores and documents how to set up two real-world open-source ATSPM systems: Utah-DOT ATSPM system and big-data-empowered UTA-In-Motion, an add-on module for ATSPM systems. Multiple integrating software tools are developed to parse simulation outputs into real-world ATSPM signal logs and WGS84 trajectories as the data feeds of ATSPM systems. Two case studies are conducted to demonstrate how this new framework can be used for traffic signal design projects. Last but not least, the research team presents their research outcome during state and national conference and webinars as technology transfer activities. AN - dot:90170 KW - Traffic signal controllers KW - Traffic simulation KW - Traffic data KW - Literature reviews KW - Planning and design KW - Trajectory KW - Best practices KW - ATSPM KW - traffic big data KW - ATSPM digital twin LA - English PB - Texas Department of Transportation. Research and Technology Implementation Office PY - 2026-04-01 SN - FHWA/TX-26 TI - Improving Traffic Signal System Planning, Design, and Management with Big-Data-Enhanced ATSPM System M3 - Tech Report N1 - United States N1 - 0-7160 UR - https://rosap.ntl.bts.gov/view/dot/90170 ER -
Development of a Laboratory-Scale Test for Evaluating the Decomposition Products Generated Inside an Intact Fuselage During a Simulated Postcrash Fuel Fire

Marker, Timothy R. ;

Speitel, Louise

2008-08-01 | PDF

This report summarizes the research effort undertaken by the Federal Aviation Administration to develop a laboratory-scale test method for evaluating the products of combustion inside an intact transport category fuselage during exposure to a simulated external fuel fire. An oil-fired burner, configured in accordance with Title 14 Code of Federal R ...

04/20/2026

Title : Development of a Laboratory-Scale Test for Evaluating the Decomposition Products Generated Inside an Intact Fuselage During a Simulated Postcrash Fuel Fire Creator(s) : Marker, Timothy R.;Speitel, Louise; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2008-08-01 Report Number : DOT/FAA/AR-TN07/15 URL : https://rosap.ntl.bts.gov/view/dot/90169 Marker, Timothy R. and Speitel, Louise (2008). Development of a Laboratory-Scale Test for Evaluating the Decomposition Products Generated Inside an Intact Fuselage During a Simulated Postcrash Fuel Fire. Marker, Timothy R. and Speitel, Louise "Development of a Laboratory-Scale Test for Evaluating the Decomposition Products Generated Inside an Intact Fuselage During a Simulated Postcrash Fuel Fire" (2008) Marker, Timothy R. and Speitel, Louise "Development of a Laboratory-Scale Test for Evaluating the Decomposition Products Generated Inside an Intact Fuselage During a Simulated Postcrash Fuel Fire" , 2008 Export RIS Citation Information. TY - Tech Report AU - Marker, Timothy R. AU - Speitel, Louise A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development AB - This report summarizes the research effort undertaken by the Federal Aviation Administration to develop a laboratory-scale test method for evaluating the products of combustion inside an intact transport category fuselage during exposure to a simulated external fuel fire. An oil-fired burner, configured in accordance with Title 14 Code of Federal Regulations Part 25.856(b) Appendix F Part VII, was used to simulate the fuel fire, and a 4- by 4- by 4-foot steel cube box was used to mount representative test samples. The cube box simulated an intact fuselage and served as an enclosure to collect emitted gases during fire exposure. Test samples representing a variety of fuselage constructions were evaluated, including a noncontemporary prototype structural composite material (without thermal acoustic insulation). A typical cross section consists of a 40- by 40-inch aluminum panel representing the fuselage skin and the accompanying thermal acoustic insulation blanket behind the skin. Two thermal acoustical configurations were also tested. The first contained a heat-stabilized polyacrylonitrile fiber blanket. The second contained a ceramic paper barrier sandwiched under a fiberglass blanket. Each was encased by a thin metallized polyvinylfluoride moisture barrier. These burnthrough-resistant configurations were primarily run to provide a baseline for comparing the emitted gas concentrations with that of the prototype structural composite material. AN - dot:90169 ET - Technical Notes KW - Composite materials KW - Prototypes KW - Structural models KW - Postcrash phase KW - Heat insulating materials KW - Gases KW - Combustion KW - Spectroscopy KW - Toxicity KW - Burnthrough KW - Insulation batting KW - Heat-stabilized polyacrylonitrile fiber KW - Lower explosive limit LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research PY - 2008-08-01 SN - DOT/FAA/AR-TN07/15 TI - Development of a Laboratory-Scale Test for Evaluating the Decomposition Products Generated Inside an Intact Fuselage During a Simulated Postcrash Fuel Fire M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90169 ER -
Subgrade CBR Values for Alpha Factor Determination Using Data Collected at the National Airport Pavement Test Facility

Hayhoe, Gordon F.

2007-04-01 | PDF

Full-scale traffic test results from tests run at the Federal Aviation Administration National Airport Pavement Test Facility (NAPTF) in 2000, 2001, and 2002 with four-wheel and six-wheel landing gears have previously been combined with results from tests run by the U.S. Army Corps of Engineers in the early 1970s. The combined results were analyzed ...

04/20/2026

Title : Subgrade CBR Values for Alpha Factor Determination Using Data Collected at the National Airport Pavement Test Facility Creator(s) : Hayhoe, Gordon F. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Airport Safety and Operations Division Published Date : 2007-04-01 Report Number : DOT/FAA/AR-TN07/14 URL : https://rosap.ntl.bts.gov/view/dot/90168 Hayhoe, Gordon F. (2007). Subgrade CBR Values for Alpha Factor Determination Using Data Collected at the National Airport Pavement Test Facility. Hayhoe, Gordon F. "Subgrade CBR Values for Alpha Factor Determination Using Data Collected at the National Airport Pavement Test Facility" (2007) Hayhoe, Gordon F. "Subgrade CBR Values for Alpha Factor Determination Using Data Collected at the National Airport Pavement Test Facility" , 2007 Export RIS Citation Information. TY - Tech Report AU - Hayhoe, Gordon F. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Airport Safety and Operations Division AB - Full-scale traffic test results from tests run at the Federal Aviation Administration National Airport Pavement Test Facility (NAPTF) in 2000, 2001, and 2002 with four-wheel and six-wheel landing gears have previously been combined with results from tests run by the U.S. Army Corps of Engineers in the early 1970s. The combined results were analyzed in a recent report, and updated alpha factor values were determined for four- and six-wheel gears at 10,000 coverages. The strength of the subgrades in the NAPTF test pavements was characterized by averages of CBR (California Bearing Ratio) measurements made at the surface of the subgrade before and after testing and CBR measurements made after testing at depths of one foot and two feet (30.48 cm and 60.96 cm) below the surface of the subgrade. A number of minor transcription and rounding errors were made in the original calculations of the average CBR values and, since publication of the previous report, results have become available from an additional trench opened in one of the test items. The average CBR values for the NAPTF tests are updated in this report, resulting in an increase in the computed four-wheel alpha factor of approximately 0.6 percent and a decrease in the computed six-wheel alpha factor of approximately 1.3 percent. AN - dot:90168 ET - Technical Notes KW - Standards KW - Flexible pavements KW - Design practices KW - Traffic equivalence factor KW - Pavement performance KW - ICAO standards KW - CBR flexible pavement design procedure KW - Alpha factor KW - Full-scale test results KW - Heavy aircraft pavement loading LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-04-01 SN - DOT/FAA/AR-TN07/14 TI - Subgrade CBR Values for Alpha Factor Determination Using Data Collected at the National Airport Pavement Test Facility M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90168 ER -
Implementation of Steel Bridge Protection Policy [Technical Summary]

Chang, Luh-Maan

2003-10-01 | PDF

To prevent deterioration of a bridge condition leading to structural deficiency through corrosive actions, choosing and applying a suitable coating system on the steel bridge surfaces are very important. Moreover, it can further protect the painted bridges to use explicit contract wording to warrant the quality of bridge painting work after the sub ...

04/20/2026

Title : Implementation of Steel Bridge Protection Policy [Technical Summary] Creator(s) : Chang, Luh-Maan 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 : 2003-10-01 Report Number : FHWA/IN/JTRP-2001/29 URL : https://rosap.ntl.bts.gov/view/dot/90167 Chang, Luh-Maan (2003). Implementation of Steel Bridge Protection Policy [Technical Summary]. Chang, Luh-Maan "Implementation of Steel Bridge Protection Policy [Technical Summary]" (2003) Chang, Luh-Maan "Implementation of Steel Bridge Protection Policy [Technical Summary]" , 2003 Export RIS Citation Information. TY - Brief AU - Chang, Luh-Maan A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - To prevent deterioration of a bridge condition leading to structural deficiency through corrosive actions, choosing and applying a suitable coating system on the steel bridge surfaces are very important. Moreover, it can further protect the painted bridges to use explicit contract wording to warrant the quality of bridge painting work after the substantial completion of the painting project. This study is intended to further develop warranty clauses and computerized image processing system previously used on an INDOT steel bridge painting demonstration project. The study found eleven elements essential for the successful warranty contract application. They are: warranty period, defects definition, inspection schedule, repair procedure and progress schedule for correction work, season of work. AN - dot:90167 ET - Technical Summary KW - Image processing KW - Algorithms KW - Fuzzy systems KW - Rust prevention KW - Steel bridges KW - Warranty KW - Painting KW - Protection KW - Policy KW - Literature reviews KW - image processing techniques KW - K-means algorithm KW - neurofuzzy KW - rust recognition KW - segmentation KW - steel bridge painting KW - warranty clauses LA - English PB - Indiana Department of Transportation PY - 2003-10-01 SN - FHWA/IN/JTRP-2001/29 TI - Implementation of Steel Bridge Protection Policy [Technical Summary] M3 - Brief N1 - United States N1 - SPR-2420 UR - https://rosap.ntl.bts.gov/view/dot/90167 ER -
Vision for High-Speed Rail in America: The American Recovery and Reinvestment Act

United States. Department of Transportation. Federal Railroad Administration

2009-04-01 | PDF

In order to meet the goals of the Recovery Act while initiating a transformational new program, we propose to advance three funding “tracks”: Projects: Provide grants to complete individual projects that are “ready to go” with preliminary engineering and environmental work completed; Corridor programs: Enter into cooperative agreements to develop e ...

04/20/2026

Title : Vision for High-Speed Rail in America: The American Recovery and Reinvestment Act Corporate Creator(s) : United States. Department of Transportation. Federal Railroad Administration Published Date : 2009-04-01 URL : https://rosap.ntl.bts.gov/view/dot/90166 United States. Department of Transportation. Federal Railroad Administration (2009). Vision for High-Speed Rail in America: The American Recovery and Reinvestment Act. United States. Department of Transportation. Federal Railroad Administration "Vision for High-Speed Rail in America: The American Recovery and Reinvestment Act" (2009) United States. Department of Transportation. Federal Railroad Administration "Vision for High-Speed Rail in America: The American Recovery and Reinvestment Act" , 2009 Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Railroad Administration AB - In order to meet the goals of the Recovery Act while initiating a transformational new program, we propose to advance three funding “tracks”: Projects: Provide grants to complete individual projects that are “ready to go” with preliminary engineering and environmental work completed; Corridor programs: Enter into cooperative agreements to develop entire phases or geographic sections of corridor programs that have completed corridor plans and environmental documentation, and have a prioritized list of projects to meet the corridor objectives; this approach would involve additional Federal oversight and support; Planning: Enter into cooperative agreements for planning activities using non-ARRA appropriations funds, in order to create the corridor program and project pipeline needed to fully develop a highspeed rail network. This Strategic Plan is just the first of several steps intended to further refine and elaborate on this high-speed rail corridor vision — including the program guidance (due June 17), the Presidents detailed FY 2010 budget request, the National Rail Plan called for by Congress, and discussions over upcoming surface transportation legislation. The U.S. Department of Transportation (DOT) intends to seek structured input from stakeholders and the public throughout the process of developing and implementing the strategy. AB - This April 2009 FRA strategic plan presents a national vision for developing high-speed intercity passenger rail in the United States -- as part of a broader transportation strategy aimed at economic competitiveness, energy efficiency, environmental quality, safety, and more connected communities. The document proposes a phased Federal approach built around project funding, corridor-program development, and planning, supported initially by ARRA funding and followed by longer-term annual investment. It also sets out the speed-based service framework that became highly influential in later U.S. rail planning: Conventional Rail (up to 79–90 mph), Emerging HSR (up to 90–110 mph), HSR–Regional (110–150 mph), and HSR–Express (150+ mph). The "Emerging" and "Regional" categories were later combined into a single grouping called Higher-Speed Rail (HrSR.) As a result, this report is widely cited as the foundational FRA document defining the speed-range classifications that have continued to shape later practice and discussion. AN - dot:90166 ET - Reports to Congress KW - Financing KW - Grant aid KW - High speed rail KW - History KW - Intercity transportation KW - Legislation KW - Plan implementation KW - Railroads KW - Strategic planning KW - American Recovery and Reinvestment Act of 2009 LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2009-04-01 TI - Vision for High-Speed Rail in America: The American Recovery and Reinvestment Act M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90166 ER -
Value Capture: Capitalizing on the Value Created by Transportation

United States. Department of Transportation. Federal Highway Administration

2019-01-30 | PDF

Public investment in transportation assets that improve access benefits owners of adjacent properties through greater land value and other economic impacts. Many techniques are available to the public sector to share in a portion of this increased land value to build, maintain, or reinvest in the transportation system. Value capture begins with the ...

04/20/2026

Title : Value Capture: Capitalizing on the Value Created by Transportation Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Natzke, Stefan;Bishop, Thay; Published Date : 2019-01-30 URL : https://rosap.ntl.bts.gov/view/dot/90165 United States. Department of Transportation. Federal Highway Administration (2019). Value Capture: Capitalizing on the Value Created by Transportation. United States. Department of Transportation. Federal Highway Administration "Value Capture: Capitalizing on the Value Created by Transportation" (2019) United States. Department of Transportation. Federal Highway Administration "Value Capture: Capitalizing on the Value Created by Transportation" , 2019 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Natzke, Stefan A4 - Bishop, Thay AB - Public investment in transportation assets that improve access benefits owners of adjacent properties through greater land value and other economic impacts. Many techniques are available to the public sector to share in a portion of this increased land value to build, maintain, or reinvest in the transportation system. Value capture begins with the assessment created by the access transportation provides. Value is then enhanced through private sector investment and economic development enabled by the public investment. A portion of that appraisal created by the infrastructure can be "captured" by the public sector to reinvest in, operate, or maintain transportation infrastructure. These principles can be applied to most development scenarios, whether new infrastructure for new land development or rebuilt or enhanced existing infrastructure. Both the planning and implementation for value capture rely primarily on local government initiatives. For these local public agencies, value capture provides the opportunity to raise matching funds for Federal-Aid Highway Program projects and others. AN - dot:90165 KW - Value capture KW - Property values KW - Financing KW - Research projects KW - Project delivery LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2019-01-30 TI - Value Capture: Capitalizing on the Value Created by Transportation M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90165 ER -
Implementation of Steel Bridge Protection Policy

Chang, Luh-Maan ;

Chen, Po-Han

2003-10-01 | PDF

Many Departments of Transportation (DOTs) have made tremendous efforts for managing their civil infrastructure systems effectively and to meet public demands for their performance and safety. The introduction of warranties helps many DOTs keep their construction with better quality by shifting post-construction responsibilities to contractors. Warr ...

04/20/2026

Title : Implementation of Steel Bridge Protection Policy Creator(s) : Chang, Luh-Maan;Chen, Po-Han;Lee, Sangwook; 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 : 2003-10-01 Report Number : FHWA/IN/JTRP-2001/29 URL : https://rosap.ntl.bts.gov/view/dot/90164 Chang, Luh-Maan et al. (2003). Implementation of Steel Bridge Protection Policy. Chang, Luh-Maan and Chen, Po-Han and Lee, Sangwook "Implementation of Steel Bridge Protection Policy" (2003) Chang, Luh-Maan et al. "Implementation of Steel Bridge Protection Policy" , 2003 Export RIS Citation Information. TY - Tech Report AU - Chang, Luh-Maan AU - Chen, Po-Han AU - Lee, Sangwook A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Many Departments of Transportation (DOTs) have made tremendous efforts for managing their civil infrastructure systems effectively and to meet public demands for their performance and safety. The introduction of warranties helps many DOTs keep their construction with better quality by shifting post-construction responsibilities to contractors. Warranties are applied to numerous items according to each DOT’s needs, and this research focuses on steel bridge painting protection policy for Indiana Department of Transportation (INDOT). This research represents the development of an implementable warranty clause for protecting steel bridge painting and the image processing technique for the objective and quantitative painting quality assessment. In the warranty clause development, extensive literature review was performed, and many currently used steel bridge painting warranties were analyzed and compared. It was found that eleven items consist of the core issues for successful bridge painting warranty projects. The eleven elements are warranty period, defects definition, inspection schedule, repair procedure and progress schedule for correction work, season of work, liability insurance, traffic control, supplementary performance bond, supplementary lien bond, surety company, and work permit. These elements are used to framework INDOT’s warranty clause for protecting its steel bridge painting. In addition, this report proposes the various image processing techniques that can recognize the rust on the steel bridge surfaces. The computerized techniques are constructed for unbiased rust recognition and percentage determination in terms of distance, angles, brightness, and cleanness. The report explains the theoretical background and the application procedures and examples. Random sampling plan and stepwise applications are also proposed. AN - dot:90164 ET - Final Report KW - Image processing KW - Algorithms KW - Fuzzy systems KW - Rust prevention KW - Steel bridges KW - Warranty KW - Painting KW - Protection KW - Implementation KW - Policy KW - Literature reviews KW - image processing techniques KW - K-means algorithm KW - neurofuzzy KW - rust recognition KW - segmentation KW - steel bridge painting KW - warranty clauses LA - English PB - Indiana Department of Transportation PY - 2003-10-01 SN - FHWA/IN/JTRP-2001/29 TI - Implementation of Steel Bridge Protection Policy M3 - Tech Report N1 - United States N1 - SPR-2420 UR - https://rosap.ntl.bts.gov/view/dot/90164 ER -
Every Day Counts Innovation Initiative: Enhanced Technical Assistance for Ongoing EISs FAQs

United States. Department of Transportation. Federal Highway Administration

2011-11-07 | PDF

Why is Enhanced Technical Assistance needed? Highway projects that require Environmental Impact Statements (EISs) typically take 12-13 years to complete. The National Environmental Policy Act (NEPA) process alone takes an average of 4 years. Enhanced technical assistance will help transportation planners meet EIS requirements much more quickly. Wha ...

04/20/2026

Title : Every Day Counts Innovation Initiative: Enhanced Technical Assistance for Ongoing EISs FAQs Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2011-11-07 URL : https://rosap.ntl.bts.gov/view/dot/90163 United States. Department of Transportation. Federal Highway Administration (2011). Every Day Counts Innovation Initiative: Enhanced Technical Assistance for Ongoing EISs FAQs. United States. Department of Transportation. Federal Highway Administration "Every Day Counts Innovation Initiative: Enhanced Technical Assistance for Ongoing EISs FAQs" (2011) United States. Department of Transportation. Federal Highway Administration "Every Day Counts Innovation Initiative: Enhanced Technical Assistance for Ongoing EISs FAQs" , 2011 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration AB - Why is Enhanced Technical Assistance needed? Highway projects that require Environmental Impact Statements (EISs) typically take 12-13 years to complete. The National Environmental Policy Act (NEPA) process alone takes an average of 4 years. Enhanced technical assistance will help transportation planners meet EIS requirements much more quickly. What are the goals of the Enhanced Technical Assistance initiative? It will shorten project delivery by streamlining the EIS process. This initiative will encourage broader and more effective cross-disciplinary participation. It also encourages greater consistency in project development. Moreover, it will increase the effectiveness of Federal Highway Administration (FHWA) Divisional staff members who act as resources for the Project Development process. AN - dot:90163 KW - Innovation KW - Environmental impact statements KW - Project delivery KW - Technical assistance LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2011-11-07 TI - Every Day Counts Innovation Initiative: Enhanced Technical Assistance for Ongoing EISs FAQs M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90163 ER -
Modification of Visual Approach Slope Indicator Baffles at Pearson Field Airpark, Vancouver, WA

Patterson, James W.

2007-06-01 | PDF

This technical note describes a research effort that was accomplished to correct a safety deficiency with a Visual Approach Slope Indicator (VASI) system at the Pearson Field Airpark in Vancouver, Washington. During a recent inspection flight, the VASI system was found to be emitting signals that could potentially draw an approaching aircraft dange ...

04/20/2026

Title : Modification of Visual Approach Slope Indicator Baffles at Pearson Field Airpark, Vancouver, WA Creator(s) : Patterson, James W. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Northwest Mountain Regional Office Published Date : 2007-06-01 Report Number : DOT/FAA/AR-TN07/12 URL : https://rosap.ntl.bts.gov/view/dot/90162 Patterson, James W. (2007). Modification of Visual Approach Slope Indicator Baffles at Pearson Field Airpark, Vancouver, WA. Patterson, James W. "Modification of Visual Approach Slope Indicator Baffles at Pearson Field Airpark, Vancouver, WA" (2007) Patterson, James W. "Modification of Visual Approach Slope Indicator Baffles at Pearson Field Airpark, Vancouver, WA" , 2007 Export RIS Citation Information. TY - Tech Report AU - Patterson, James W. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Northwest Mountain Regional Office AB - This technical note describes a research effort that was accomplished to correct a safety deficiency with a Visual Approach Slope Indicator (VASI) system at the Pearson Field Airpark in Vancouver, Washington. During a recent inspection flight, the VASI system was found to be emitting signals that could potentially draw an approaching aircraft dangerously close to an obstruction near the final approach path. As a result, the system was shutdown. The VASI system had baffles previously installed on the inside and on the front opening of the unit that were intended to limit the emission of light in the direction of the obstruction. The baffles were found to have very comparable opening widths in all units of the system, which allowed the signal from some units to be visible within a very close proximity to an obstruction. Typically, each opening requires a different width to provide proper signal blocking at the specific location of the obstruction. The Federal Aviation Administration Northwest-Mountain Region, Navigational Surveillance Weather Systems Team requested the Airport Technology Research and Development Branch’s assistance in correcting the misaligned baffles so that the VASI system could be restored to operation. AN - dot:90162 ET - Technical Notes KW - Air traffic control KW - Approach KW - Landing aids KW - Lighting LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-06-01 SN - DOT/FAA/AR-TN07/12 TI - Modification of Visual Approach Slope Indicator Baffles at Pearson Field Airpark, Vancouver, WA M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90162 ER -
Summary of Safety Management System Activity Status

Jensen, Lynn ;

Keller, Stefan

2007-04-01 | PDF

This technical note presents a review of the Safety Management System (SMS) Draft Standard, v.9, produced by the Joint Planning and Development Office (JPDO) working group. This review shows the concerns about how useful and effective the JPDO draft standard appears to be with respect to implementing SMS requirements by regulated entities such as a ...

04/20/2026

Title : Summary of Safety Management System Activity Status Creator(s) : Jensen, Lynn;Keller, Stefan;Leonelli, Frederick J.; Corporate Creator(s) : FJ Leonelli Group, Inc;Aviation Systems Consultants; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2007-04-01 Report Number : DOT/FAA/AR-TN07/10 URL : https://rosap.ntl.bts.gov/view/dot/90161 Jensen, Lynn et al. (2007). Summary of Safety Management System Activity Status. Jensen, Lynn and Keller, Stefan and Leonelli, Frederick J. "Summary of Safety Management System Activity Status" (2007) Jensen, Lynn et al. "Summary of Safety Management System Activity Status" , 2007 Export RIS Citation Information. TY - Tech Report AU - Jensen, Lynn AU - Keller, Stefan AU - Leonelli, Frederick J. A2 - FJ Leonelli Group, Inc A2 - Aviation Systems Consultants A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development AB - This technical note presents a review of the Safety Management System (SMS) Draft Standard, v.9, produced by the Joint Planning and Development Office (JPDO) working group. This review shows the concerns about how useful and effective the JPDO draft standard appears to be with respect to implementing SMS requirements by regulated entities such as airlines, repair stations, and manufacturers. AN - dot:90161 ET - Technical Notes KW - Civil aviation KW - Safety management KW - Safety culture KW - Implementation KW - Oversight LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-04-01 SN - DOT/FAA/AR-TN07/10 TI - Summary of Safety Management System Activity Status M3 - Tech Report N1 - United States N1 - DTFAAC-05-D-00010 UR - https://rosap.ntl.bts.gov/view/dot/90161 ER -
Weather-Responsive Management Strategies

United States. Department of Transportation. Federal Highway Administration

2019-01-30 | PDF

Over the last 10 years, vehicle crashes have averaged more than 5.7 million per year. Twenty-one percent of those crashes—nearly1.21 million— occurred under adverse weather conditions. On average, nearly 6,000 people are killed and over 445,000 are injured in weather-related crashes each year. Likewise, the delays associated with weather can be pro ...

04/20/2026

Title : Weather-Responsive Management Strategies Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Alfelor, Roemer Published Date : 2019-01-30 URL : https://rosap.ntl.bts.gov/view/dot/90160 United States. Department of Transportation. Federal Highway Administration (2019). Weather-Responsive Management Strategies. United States. Department of Transportation. Federal Highway Administration "Weather-Responsive Management Strategies" (2019) United States. Department of Transportation. Federal Highway Administration "Weather-Responsive Management Strategies" , 2019 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Alfelor, Roemer AB - Over the last 10 years, vehicle crashes have averaged more than 5.7 million per year. Twenty-one percent of those crashes—nearly1.21 million— occurred under adverse weather conditions. On average, nearly 6,000 people are killed and over 445,000 are injured in weather-related crashes each year. Likewise, the delays associated with weather can be profound, resulting in significant losses in efficiency. WRTM strategies provide relevant and timely information to agencies on the need for appropriate traffic intervention methods to mitigate the impacts of weather-related road and traffic conditions. The result is improved mobility, reduced delays, and safer travel during inclement weather. WRMM strategies are also used by agencies to improve mobility and safety in adverse weather, as well as reduce the negative environmental impacts and costs associated with road salt use. AN - dot:90160 KW - Road weather information systems KW - Connected vehicles KW - Weather conditions KW - Anti-icing KW - Snow and ice control LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2019-01-30 TI - Weather-Responsive Management Strategies M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90160 ER -
Rethinking DBE for Design-Build

United States. Department of Transportation. Federal Highway Administration

2022-12-16 | PDF

Providing opportunities for small, disadvantaged firms is the essence of the DBE Program. However, as States, or other project sponsors, increase their use of design-build for project delivery, this contracting method is presenting challenges to ensuring that equitable opportunities are realized. Innovative tools and practices are available for mod ...

04/20/2026

Title : Rethinking DBE for Design-Build Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Thorkildsen, Christine;Kenley, Martha;Gross, Eric D; Published Date : 2022-12-16 Report Number : FHWA-22-CAI-034 URL : https://rosap.ntl.bts.gov/view/dot/90159 United States. Department of Transportation. Federal Highway Administration (2022). Rethinking DBE for Design-Build. United States. Department of Transportation. Federal Highway Administration "Rethinking DBE for Design-Build" (2022) United States. Department of Transportation. Federal Highway Administration "Rethinking DBE for Design-Build" , 2022 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Thorkildsen, Christine A4 - Kenley, Martha A4 - Gross, Eric D AB - Providing opportunities for small, disadvantaged firms is the essence of the DBE Program. However, as States, or other project sponsors, increase their use of design-build for project delivery, this contracting method is presenting challenges to ensuring that equitable opportunities are realized. Innovative tools and practices are available for modifying traditional DBE commitment processes to align with the design-build process and improve participation. AN - dot:90159 KW - Design bid build KW - Disadvantaged business enterprises KW - Project delivery KW - Contracting LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2022-12-16 SN - FHWA-22-CAI-034 TI - Rethinking DBE for Design-Build M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90159 ER -
Collaborative Hydraulics: Advancing to the Next Generation of Engineering (CHANGE) [2019]

United States. Department of Transportation. Federal Highway Administration

2019-01-30 | PDF

Practicing engineers and designers have used one-dimensional (1D) hydraulic modeling tools routinely for nearly 60 years. Although user interfaces have greatly improved during this time, the underlying computational techniques have remained the same. These modeling techniques apply several simplifying assumptions that can lead to overly conservativ ...

04/20/2026

Title : Collaborative Hydraulics: Advancing to the Next Generation of Engineering (CHANGE) [2019] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Hogan, Scott;Brown, Eric;Girard, Laura; Published Date : 2019-01-30 URL : https://rosap.ntl.bts.gov/view/dot/90158 United States. Department of Transportation. Federal Highway Administration (2019). Collaborative Hydraulics: Advancing to the Next Generation of Engineering (CHANGE) [2019]. United States. Department of Transportation. Federal Highway Administration "Collaborative Hydraulics: Advancing to the Next Generation of Engineering (CHANGE) [2019]" (2019) United States. Department of Transportation. Federal Highway Administration "Collaborative Hydraulics: Advancing to the Next Generation of Engineering (CHANGE) [2019]" , 2019 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Hogan, Scott A4 - Brown, Eric A4 - Girard, Laura AB - Practicing engineers and designers have used one-dimensional (1D) hydraulic modeling tools routinely for nearly 60 years. Although user interfaces have greatly improved during this time, the underlying computational techniques have remained the same. These modeling techniques apply several simplifying assumptions that can lead to overly conservative, inadequate, or inaccurate results and are insufficient to meet many of today’s project requirements. For example, in recent years, resource agencies have increased their focus on assessment of environmental impacts associated with river crossings. As a result, 3D graphical results from a 2D hydraulic model. hydraulic engineers have become responsible for demonstrating that impacts have been avoided or minimized to the extent possible. Traditional hydraulic tools do not effectively support these levels of inquiry and analysis. AN - dot:90158 KW - Environmental impact analysis KW - Project delivery KW - Hydraulics KW - Bridge construction KW - Three dimensional displays LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2019-01-30 TI - Collaborative Hydraulics: Advancing to the Next Generation of Engineering (CHANGE) [2019] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90158 ER -
Advanced Geotechnical Methods in Exploration (A-GaME)

United States. Department of Transportation. Federal Highway Administration

2019-01-29 | PDF

Up to 50 percent of major infrastructure projects suffer impacts to schedule or cost due to geotechnical issues. Many of these issues relate to risks identified directly or indirectly to the scope and quality of site characterization work. Effective site characterization is critical for recognizing potential problems that may affect design and cons ...

04/20/2026

Title : Advanced Geotechnical Methods in Exploration (A-GaME) Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Rivers, Benjamin;Nichols, Silas; Published Date : 2019-01-29 URL : https://rosap.ntl.bts.gov/view/dot/90157 United States. Department of Transportation. Federal Highway Administration (2019). Advanced Geotechnical Methods in Exploration (A-GaME). United States. Department of Transportation. Federal Highway Administration "Advanced Geotechnical Methods in Exploration (A-GaME)" (2019) United States. Department of Transportation. Federal Highway Administration "Advanced Geotechnical Methods in Exploration (A-GaME)" , 2019 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Rivers, Benjamin A4 - Nichols, Silas AB - Up to 50 percent of major infrastructure projects suffer impacts to schedule or cost due to geotechnical issues. Many of these issues relate to risks identified directly or indirectly to the scope and quality of site characterization work. Effective site characterization is critical for recognizing potential problems that may affect design and construction and for ensuring safe, well-performing, and cost-effective projects. AN - dot:90157 KW - Geotechnical engineering KW - Risk management KW - Reliability KW - Exploration KW - Surveying LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2019-01-29 TI - Advanced Geotechnical Methods in Exploration (A-GaME) M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90157 ER -
Unmanned Aerial Systems (UAS)

United States. Department of Transportation. Federal Highway Administration

2019-01-30 | PDF

Unmanned aerial systems (UAS), sometimes referred to as drones, are multi-use aircraft controlled from a licensed operator on the ground. The benefits of UAS are wide ranging and impact nearly all aspects of highway transportation—replacing boots on the ground, increasing accuracy, speeding up data collection, and providing access to hard-to-reach ...

04/20/2026

Title : Unmanned Aerial Systems (UAS) Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Gray, James;Yew, Connie; Published Date : 2019-01-30 URL : https://rosap.ntl.bts.gov/view/dot/90156 United States. Department of Transportation. Federal Highway Administration (2019). Unmanned Aerial Systems (UAS). United States. Department of Transportation. Federal Highway Administration "Unmanned Aerial Systems (UAS)" (2019) United States. Department of Transportation. Federal Highway Administration "Unmanned Aerial Systems (UAS)" , 2019 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Gray, James A4 - Yew, Connie AB - Unmanned aerial systems (UAS), sometimes referred to as drones, are multi-use aircraft controlled from a licensed operator on the ground. The benefits of UAS are wide ranging and impact nearly all aspects of highway transportation—replacing boots on the ground, increasing accuracy, speeding up data collection, and providing access to hard-to-reach locations. UAS provide high-quality survey and data mapping that can be collected automatically or remotely. Large areas can be mapped relatively quickly in comparison to traditional survey and mapping practices. Other uses include survey and imagery as part of emergency response events, where traditional surveying and mapping practices may be inadequate or sites impossible to access. UAS can supplement conventional activities, such as bridge safety inspection and routine construction inspection, to increase safety and collect data from otherwise unattainable perspectives. AN - dot:90156 KW - Unmanned aircraft systems KW - Drones KW - Aerial surveying KW - Data collection KW - Inspection LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2019-01-30 TI - Unmanned Aerial Systems (UAS) M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90156 ER -
Project Bundling

United States. Department of Transportation. Federal Highway Administration

2019-02-11 | PDF

Project bundling offers a comprehensive and accelerated delivery solution for addressing strategic program goals. It streamlines design, contracting, and construction; allows agencies to capitalize on economies of scale to increase efficiency; and supports greater collaboration during project delivery and construction.

04/20/2026

Title : Project Bundling Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Garcia, Romeo;Unkefer, R. David; Published Date : 2019-02-11 URL : https://rosap.ntl.bts.gov/view/dot/90155 United States. Department of Transportation. Federal Highway Administration (2019). Project Bundling. United States. Department of Transportation. Federal Highway Administration "Project Bundling" (2019) United States. Department of Transportation. Federal Highway Administration "Project Bundling" , 2019 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Garcia, Romeo A4 - Unkefer, R. David AB - Project bundling offers a comprehensive and accelerated delivery solution for addressing strategic program goals. It streamlines design, contracting, and construction; allows agencies to capitalize on economies of scale to increase efficiency; and supports greater collaboration during project delivery and construction. AN - dot:90155 KW - Project management KW - Road construction KW - Bridge construction KW - Best practices KW - Contracting LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2019-02-11 TI - Project Bundling M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90155 ER -
Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users [Research Brief]

Pande, Anurag

;

Majumdar, Anandamayee

2026-04-01 | PDF

This research examines whether police-reported crash data alone are sufficient for developing equitable and accurate HINs. The study evaluates the extent of underreporting by comparing police crash records with Emergency Medical Services (EMS) data and real-time 911 call data. Overall, the research assesses whether integrating alternative data sour ...

04/20/2026

Title : Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users [Research Brief] Creator(s) : Pande, Anurag;Majumdar, Anandamayee;Kantorowski, Lucas Roman; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute;California Polytechnic State University, San Luis Obispo; Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;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 : 2026-04-01 Report Number : 2459 URL : https://rosap.ntl.bts.gov/view/dot/90154 Pande, Anurag et al. (2026). Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users [Research Brief]. Pande, Anurag and Majumdar, Anandamayee and Kantorowski, Lucas Roman "Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users [Research Brief]" (2026) Pande, Anurag et al. "Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users [Research Brief]" , 2026 Export RIS Citation Information. TY - Brief AU - Pande, Anurag AU - Majumdar, Anandamayee AU - Kantorowski, Lucas Roman A2 - San Jose State University. College of Business. Mineta Transportation Institute A2 - California Polytechnic State University, San Luis Obispo A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration 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 examines whether police-reported crash data alone are sufficient for developing equitable and accurate HINs. The study evaluates the extent of underreporting by comparing police crash records with Emergency Medical Services (EMS) data and real-time 911 call data. Overall, the research assesses whether integrating alternative data sources can provide a more complete, timely, and representative picture of traffic injury risk to better support Vision Zero implementation. AN - dot:90154 ET - Research Brief KW - Transportation safety KW - Crash data KW - Vulnerable road users KW - Demographics KW - Spatial analysis KW - Transportation equity KW - Estimation theory KW - Data collection KW - Statistical analysis KW - Emergency medical services KW - Injuries KW - Traffic crashes LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-04-01 SN - 2459 TI - Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users [Research Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90154 ER -
Enhancing Performance with Internally Cured Concrete (EPIC2)

United States. Department of Transportation. Federal Highway Administration

2022-12-19 | PDF

Shrinkage cracking in concrete is a key limiting factor in achieving acceptable long-term performance in concrete bridges, roads, and repairs. When this cracking occurs at an early age, it leaves the concrete and embedded reinforcement exposed to degradation, reducing the service life of the structure. Unlike conventional curing where water is supp ...

04/20/2026

Title : Enhancing Performance with Internally Cured Concrete (EPIC2) Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Barrett, Tim;Praul, Mike;Conway, Robert;Holt, Reggie H.; Published Date : 2022-12-19 Report Number : FHWA-22-CAI-032 URL : https://rosap.ntl.bts.gov/view/dot/90153 United States. Department of Transportation. Federal Highway Administration (2022). Enhancing Performance with Internally Cured Concrete (EPIC2). United States. Department of Transportation. Federal Highway Administration "Enhancing Performance with Internally Cured Concrete (EPIC2)" (2022) United States. Department of Transportation. Federal Highway Administration "Enhancing Performance with Internally Cured Concrete (EPIC2)" , 2022 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Barrett, Tim A4 - Praul, Mike A4 - Conway, Robert A4 - Holt, Reggie H. AB - Shrinkage cracking in concrete is a key limiting factor in achieving acceptable long-term performance in concrete bridges, roads, and repairs. When this cracking occurs at an early age, it leaves the concrete and embedded reinforcement exposed to degradation, reducing the service life of the structure. Unlike conventional curing where water is supplied on the concrete’s surface, internal curing provides a source of moisture from inside the concrete mixture, improving its resistance to cracking and overall durability. AN - dot:90153 KW - Concrete KW - Concrete curing KW - Admixtures KW - Shrinkage KW - Pavement performance LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2022-12-19 SN - FHWA-22-CAI-032 TI - Enhancing Performance with Internally Cured Concrete (EPIC2) M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90153 ER -
Next-Generation Traffic Incident Management: Technology for Saving Lives (NextGen TIM Tech)

United States. Department of Transportation. Federal Highway Administration

2023-10-03 | PDF

More than 6 million reportable crashes occur each year in the United States, resulting in 2 million injuries and more than 30,000 fatalities. Additionally, there are over 32 million disabled vehicles and countless incidents of roadway debris. Each of these events places responders and motorists at risk of secondary crashes. A planned and coordinate ...

04/20/2026

Title : Next-Generation Traffic Incident Management: Technology for Saving Lives (NextGen TIM Tech) Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Jodoin, Paul;Austrich, James;Tebo, Joseph; Published Date : 2023-10-03 URL : https://rosap.ntl.bts.gov/view/dot/90152 United States. Department of Transportation. Federal Highway Administration (2023). Next-Generation Traffic Incident Management: Technology for Saving Lives (NextGen TIM Tech). United States. Department of Transportation. Federal Highway Administration "Next-Generation Traffic Incident Management: Technology for Saving Lives (NextGen TIM Tech)" (2023) United States. Department of Transportation. Federal Highway Administration "Next-Generation Traffic Incident Management: Technology for Saving Lives (NextGen TIM Tech)" , 2023 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Jodoin, Paul A4 - Austrich, James A4 - Tebo, Joseph AB - More than 6 million reportable crashes occur each year in the United States, resulting in 2 million injuries and more than 30,000 fatalities. Additionally, there are over 32 million disabled vehicles and countless incidents of roadway debris. Each of these events places responders and motorists at risk of secondary crashes. A planned and coordinated approach to handling these incidents is the essence of Traffic Incident Management (TIM). The Federal Highway Administration’s (FHWA's) national TIM responder training program has successfully trained more than 650,000 responders to clear incidents collaboratively, safely, and quickly. In practice, TIM on all types of roadways has been shown to save lives, time, and money. AN - dot:90152 KW - Incident management KW - Traffic incidents KW - Traffic safety KW - Traffic crashes LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2023-10-03 TI - Next-Generation Traffic Incident Management: Technology for Saving Lives (NextGen TIM Tech) M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90152 ER -
Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users

Pande, Anurag

;

Majumdar, Anandamayee

2026-04-01 | PDF

To improve traffic safety, communities first need to know where serious crashes are actually happening. High-Injury Networks are designed to identify these locations, but they are usually built using only police-reported crash data. This research asks: Are we missing crashes—and injuries—by relying on police data alone? The research team first demo ...

04/20/2026

Title : Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users Creator(s) : Pande, Anurag;Majumdar, Anandamayee;Kantorowski, Lucas Roman; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute;California Polytechnic State University, San Luis Obispo; Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;United States. Department of Transportation. University Transportation Centers (UTC) Program; Published Date : 2026-04-01 Report Number : 26-08 DOI : https://doi.org/10.31979/mti.2026.2459 Pande, Anurag et al. (2026). Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users. https://doi.org/10.31979/mti.2026.2459 Pande, Anurag and Majumdar, Anandamayee and Kantorowski, Lucas Roman "Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users" (2026), https://doi.org/10.31979/mti.2026.2459 Pande, Anurag et al. "Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users" , 2026, https://doi.org/10.31979/mti.2026.2459 Export RIS Citation Information. TY - Tech Report AU - Pande, Anurag AU - Majumdar, Anandamayee AU - Kantorowski, Lucas Roman A2 - San Jose State University. College of Business. Mineta Transportation Institute A2 - California Polytechnic State University, San Luis Obispo A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program AB - To improve traffic safety, communities first need to know where serious crashes are actually happening. High-Injury Networks are designed to identify these locations, but they are usually built using only police-reported crash data. This research asks: Are we missing crashes—and injuries—by relying on police data alone? The research team first demonstrates that data from Emergency Medical Services and those from official databases differ substantially, and neither data set captures the full extent of collisions in a community. Following that analysis, the research team concluded that a new data source may help complete this. Toward that end, the research team scraped data from PulsePoint in San Francisco to identify potential traffic collisions reported to 911 operators. The 911 call data for San Francisco, when compared with official city crash data sources, shows that several traffic incidents reported on 911 calls do not appear in the city’s official database. Statistical analysis of data from both sources vs. those found in only one of the two reveals patterns by location. Locations in police districts with lower population density (and larger geographical areas) had more 911 call-reported incidents that did not appear in the official database. The demographics of census tracts of the incident’s reported location, such as income, race, and education levels, did not appear to be statistically significant. Based on the findings, the research team provides a framework for complementing collision data with alternative sources beyond the police records in future Vision Zero efforts. The research project also resulted in a process that allows the team to continuously add to the scraped 911 call data, enabling this analysis to continue beyond what is presented in this report. When serious injuries are invisible in the data, they are invisible in safety planning. Integrating and using all available data is critical to ensuring that Vision Zero strategies reflect real-world injury risk and deliver meaningful, life-saving outcomes. AN - dot:90151 DO - https://doi.org/10.31979/mti.2026.2459 KW - Transportation safety KW - Crash data KW - Vulnerable road users KW - Demographics KW - Spatial analysis KW - Transportation equity KW - Estimation theory KW - Data collection KW - Statistical analysis KW - Emergency medical services KW - Injuries KW - Traffic crashes LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-04-01 SN - 26-08 TI - Equitable Estimation of Accurate High-Injury Networks (HINs) for Vulnerable Road Users M3 - Tech Report N1 - United States N1 - SB1-SJAUX_2023-26 UR - https://rosap.ntl.bts.gov/view/dot/90151 ER -
Breaking Down Commercial Motor Vehicle Crashes: What Are the Main Causes?

Ridgeway, Christie

;

Soccolich, Susan

2025-11-01 | PDF

This study examines commercial motor vehicle (CMV) crash severity in Idaho state from 2014–2023 by linking several state and federal databases to create an integrated analysis dataset. After filtering for completeness, 13,701 CMV-involved crashes were modeled using binary logistic regression to estimate the association between temporal, roadway, en ...

04/20/2026

Title : Breaking Down Commercial Motor Vehicle Crashes: What Are the Main Causes? Creator(s) : Ridgeway, Christie;Soccolich, Susan;Camden, Matthew C.; Corporate Creator(s) : Virginia Tech Transportation Institute Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-11-01 Report Number : FHWA-ID-25-318 URL : https://rosap.ntl.bts.gov/view/dot/90150 Ridgeway, Christie et al. (2025). Breaking Down Commercial Motor Vehicle Crashes: What Are the Main Causes?. Ridgeway, Christie and Soccolich, Susan and Camden, Matthew C. "Breaking Down Commercial Motor Vehicle Crashes: What Are the Main Causes?" (2025) Ridgeway, Christie et al. "Breaking Down Commercial Motor Vehicle Crashes: What Are the Main Causes?" , 2025 Export RIS Citation Information. TY - Tech Report AU - Ridgeway, Christie AU - Soccolich, Susan AU - Camden, Matthew C. A2 - Virginia Tech Transportation Institute A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - This study examines commercial motor vehicle (CMV) crash severity in Idaho state from 2014–2023 by linking several state and federal databases to create an integrated analysis dataset. After filtering for completeness, 13,701 CMV-involved crashes were modeled using binary logistic regression to estimate the association between temporal, roadway, environmental, work-zone, vehicle, and driver factors and the odds of high-severity outcomes. Key findings include elevated fatal-crash odds in specific weather, during time of day, in certain roadway conditions, and in particular lighting conditions. The study translates these results into actionable mitigation strategies for Idaho, including infrastructure changes, technologies, public campaigns, and educational efforts. A dedicated section outlines a continuous data quality framework to support ongoing evaluation. AN - dot:90150 ET - Final Report: 12/20/2024 – 11/25/2025 KW - Commercial vehicles KW - Crash severity KW - Distraction KW - Datasets KW - Traffic lanes KW - Work zones KW - Logistic regression analysis KW - Data analysis KW - Infrastructure KW - Crash causes KW - Traffic mitigation LA - English PB - Idaho Transportation Department PY - 2025-11-01 SN - FHWA-ID-25-318 TI - Breaking Down Commercial Motor Vehicle Crashes: What Are the Main Causes? M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90150 ER -
A Study on the Influence of Asphalt Layer Temperature on TSDD-Measured Deflection Slopes and Deflections

Nasimifar, Mahdi ;

Nadkarni, Atish A.

2026-04-01 | PDF

Pavement condition assessment is crucial for devising effective maintenance strategies. Traffic speed deflection devices (TSDDs) are increasingly being adopted worldwide for collecting pavement structural data at traffic speed. However, the temperature of the asphalt concrete layer during measurements can significantly affect TSDD readings, necessi ...

04/20/2026

Title : A Study on the Influence of Asphalt Layer Temperature on TSDD-Measured Deflection Slopes and Deflections Creator(s) : Nasimifar, Mahdi;Nadkarni, Atish A.; Corporate Creator(s) : Engineering & Software Consultants, Inc. Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development;United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center; Contributor(s) : Sivaneswaran, Nadarajah Published Date : 2026-04-01 Report Number : FHWA-HRT-26-057 URL : https://rosap.ntl.bts.gov/view/dot/90149 Nasimifar, Mahdi and Nadkarni, Atish A. (2026). A Study on the Influence of Asphalt Layer Temperature on TSDD-Measured Deflection Slopes and Deflections. Nasimifar, Mahdi and Nadkarni, Atish A. "A Study on the Influence of Asphalt Layer Temperature on TSDD-Measured Deflection Slopes and Deflections" (2026) Nasimifar, Mahdi and Nadkarni, Atish A. "A Study on the Influence of Asphalt Layer Temperature on TSDD-Measured Deflection Slopes and Deflections" , 2026 Export RIS Citation Information. TY - Tech Report AU - Nasimifar, Mahdi AU - Nadkarni, Atish A. A2 - Engineering & Software Consultants, Inc. A3 - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Sivaneswaran, Nadarajah A4 - Sivaneswaran, Nadarajah AB - Pavement condition assessment is crucial for devising effective maintenance strategies. Traffic speed deflection devices (TSDDs) are increasingly being adopted worldwide for collecting pavement structural data at traffic speed. However, the temperature of the asphalt concrete layer during measurements can significantly affect TSDD readings, necessitating temperature adjustment for proper data interpretation. While previous research has addressed temperature adjustments for certain deflection-based indices, such as the surface curvature index obtained from specific devices such as the traffic speed deflectometer (TSD), many other deflection and deflection slope parameters remain unexplored. This study addresses that gap by investigating the effect of temperature on deflections and deflection slopes collected along the midline of dual tires under a moving load. The methodology involves creating a comprehensive dataset through simulated TSDD measurements across a range of pavement structures and temperatures. For this study, the research team used the Long-Term Pavement Performance database to develop a range of representative pavement structures and analyzed more than 250,000 unique cases under simulated TSDD moving load in various temperatures. The researchers then used the database to study the temperature influence zones and develop temperature adjustment models for measured deflection slopes and deflections. Importantly, while the model development was independent of any particular TSDD device, the team evaluated the developed models with the collected field data from a TSD, due to its wide availability and adoption. However, the developed temperature adjustment models are generally applicable to any TSDD that collects midline deflection or slope data from dual tire loading while moving. Additionally, the researchers included an open-source script to automate the adjustment process for practical implementation. AN - dot:90149 ET - Final Report KW - Traffic speed KW - Deflection tests KW - Asphalt pavements KW - Pavement layers KW - Data collection LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development PY - 2026-04-01 SN - FHWA-HRT-26-057 TI - A Study on the Influence of Asphalt Layer Temperature on TSDD-Measured Deflection Slopes and Deflections M3 - Tech Report N1 - United States N1 - 693JJ324D000006 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90149 ER -
Tilting Trains: Description and Analysis of the Present Situation

Persson, Rickard

2007-01-01 | PDF

The relation between cant deficiency, top speed and tractive performance is important to get the best performance out of a tilting train. The running time improves with increased cant deficiency, top speed and tractive performance; however the benefit of increased top speed and tractive performance is small above a certain level. 15 minutes running ...

04/20/2026

Title : Tilting Trains: Description and Analysis of the Present Situation Creator(s) : Persson, Rickard Corporate Creator(s) : Swedish National Road and Transport Research Institute (VTI) Published Date : 2007-01-01 URL : https://rosap.ntl.bts.gov/view/dot/90148 Persson, Rickard (2007). Tilting Trains: Description and Analysis of the Present Situation. Persson, Rickard "Tilting Trains: Description and Analysis of the Present Situation" (2007) Persson, Rickard "Tilting Trains: Description and Analysis of the Present Situation" , 2007 Export RIS Citation Information. TY - Tech Report AU - Persson, Rickard A2 - Swedish National Road and Transport Research Institute (VTI) AB - The relation between cant deficiency, top speed and tractive performance is important to get the best performance out of a tilting train. The running time improves with increased cant deficiency, top speed and tractive performance; however the benefit of increased top speed and tractive performance is small above a certain level. 15 minutes running time may be gained on Stockholm Gothenburg if cant deficiency, top speed and tractive performance are improved compared with existing tilting trains. One interesting conclusion is that a non-tilting vehicle will, independent of top speed and tractive power, have longer running times than a tilting train with today´s maximum speed and tractive power on both studied lines. Dedicated passenger lines for non-tilting high-speed trains can be an option to the standard applied today for new built lines, particularly if an existing line can be used for freight and possibly also for regional services. AN - dot:90148 KW - Literature reviews KW - High speed ground transportation KW - Mathematical models KW - Railroad tracks KW - Rolling contact KW - Snow KW - Speed KW - Tilting trains KW - Travel time KW - Wheels LA - English PB - Swedish National Road and Transport Research Institute (VTI) PY - 2007-01-01 TI - Tilting Trains: Description and Analysis of the Present Situation M3 - Tech Report N1 - Sweden N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90148 ER -
A Framework to Procure Nondestructive Testing and Evaluation Services for Highway Bridges

Liu, Heng ;

Boone, Shane

2026-04-01 | PDF

Highway agencies often procure nondestructive testing and evaluation (NDT&E) services to assess the condition of highway bridges. Unlike traditional procurement items, NDT&E services typically require specialized resources and expertise, presenting challenges for agencies preparing procurement solicitations. The procurement process can become ineff ...

04/20/2026

Title : A Framework to Procure Nondestructive Testing and Evaluation Services for Highway Bridges Creator(s) : Liu, Heng;Boone, Shane;Azari, Hoda;Miceli, Marybeth; Corporate Creator(s) : Highway Technology Partners, LLC Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development;United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center; Published Date : 2026-04-01 Report Number : FHWA-HRT-26-056 URL : https://rosap.ntl.bts.gov/view/dot/90147 Liu, Heng et al. (2026). A Framework to Procure Nondestructive Testing and Evaluation Services for Highway Bridges. Liu, Heng et al. "A Framework to Procure Nondestructive Testing and Evaluation Services for Highway Bridges" (2026) Liu, Heng et al. "A Framework to Procure Nondestructive Testing and Evaluation Services for Highway Bridges" , 2026 Export RIS Citation Information. TY - Tech Report AU - Liu, Heng AU - Boone, Shane AU - Azari, Hoda AU - Miceli, Marybeth A2 - Highway Technology Partners, LLC A3 - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Azari, Hoda AB - Highway agencies often procure nondestructive testing and evaluation (NDT&E) services to assess the condition of highway bridges. Unlike traditional procurement items, NDT&E services typically require specialized resources and expertise, presenting challenges for agencies preparing procurement solicitations. The procurement process can become inefficient when an agency does not leverage current best practices, especially for agencies that lack procurement experience. To enhance procurement efficiency within departments of transportation, this study developed a framework that reveals the current state of practice in NDT&E procurements, as obtained through a literature review, survey, and interviews with agency representatives. The framework provides best practices across agencies. An example of procurement solicitation is presented to streamline future procurement processes. Agencies may remove nonapplicable portions to adapt to their specific procurement needs. AN - dot:90147 KW - Nondestructive tests KW - Highway bridges KW - Procurement KW - Evaluation and assessment LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development PY - 2026-04-01 SN - FHWA-HRT-26-056 TI - A Framework to Procure Nondestructive Testing and Evaluation Services for Highway Bridges M3 - Tech Report N1 - United States N1 - 693JJ319D000056 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90147 ER -
NDE: FHWA Advanced Sensing Technology & Nondestructive Evaluation Program [brochure]

United States. Department of Transportation. Federal Highway Administration

2026-03-23 | PDF

The mission of the FHWA NDE Laboratory is to conduct practical research, development, and implementation of nondestructive testing systems and technologies to improve the assessment of the condition of the Nation's highway infrastructure assets. The NDE Laboratory is a resource for FHWA, State DOTs, industry, and academia to provide unbiased expert ...

04/20/2026

Title : NDE: FHWA Advanced Sensing Technology & Nondestructive Evaluation Program [brochure] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Azari, Hoda Published Date : 2026-03-23 Report Number : FHWA-HRT-26-054 URL : https://rosap.ntl.bts.gov/view/dot/90146 United States. Department of Transportation. Federal Highway Administration (2026). NDE: FHWA Advanced Sensing Technology & Nondestructive Evaluation Program [brochure]. United States. Department of Transportation. Federal Highway Administration "NDE: FHWA Advanced Sensing Technology & Nondestructive Evaluation Program [brochure]" (2026) United States. Department of Transportation. Federal Highway Administration "NDE: FHWA Advanced Sensing Technology & Nondestructive Evaluation Program [brochure]" , 2026 Export RIS Citation Information. TY - Booklet/Pamphlet A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Azari, Hoda AB - The mission of the FHWA NDE Laboratory is to conduct practical research, development, and implementation of nondestructive testing systems and technologies to improve the assessment of the condition of the Nation's highway infrastructure assets. The NDE Laboratory is a resource for FHWA, State DOTs, industry, and academia to provide unbiased expertise on applicable NDE technologies to evaluate the condition of our Nation’s highway infrastructure. AN - dot:90146 KW - Nondestructive tests KW - Detection and identification systems KW - Research KW - Remote sensing LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-03-23 SN - FHWA-HRT-26-054 TI - NDE: FHWA Advanced Sensing Technology & Nondestructive Evaluation Program [brochure] M3 - Booklet/Pamphlet N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90146 ER -
High Speed Rail & Existing Rail Corridors

Reichelt, K.

2010-02-11 | PDF

This presentation explains how higher-speed and high-speed passenger rail differ from conventional intercity rail, especially when introduced into corridors already used by freight trains. It argues that increasing passenger speeds create growing conflicts with freight operations because of capacity limits, maintenance standards, grade-crossing iss ...

04/20/2026

Title : High Speed Rail & Existing Rail Corridors Creator(s) : Reichelt, K. Corporate Creator(s) : Northeast Wisconsin Technical College Published Date : 2010-02-11 URL : https://rosap.ntl.bts.gov/view/dot/90145 Reichelt, K. (2010). High Speed Rail & Existing Rail Corridors. Reichelt, K. "High Speed Rail & Existing Rail Corridors" (2010) Reichelt, K. "High Speed Rail & Existing Rail Corridors" , 2010 Export RIS Citation Information. TY - Presentations AU - Reichelt, K. A2 - Northeast Wisconsin Technical College AB - This presentation explains how higher-speed and high-speed passenger rail differ from conventional intercity rail, especially when introduced into corridors already used by freight trains. It argues that increasing passenger speeds create growing conflicts with freight operations because of capacity limits, maintenance standards, grade-crossing issues, and geometric constraints, making true high-speed rail largely dependent on dedicated, grade-separated, electrified right-of-way. AB - Focusing on the Pacific Northwest, especially the Portland–Seattle corridor, the presentation reviews practical design factors such as track class, curvature, station spacing, crossing protection, and positive train control, while also highlighting governance, regulatory, and ownership issues. It concludes by describing Washington and Oregon efforts to pursue incremental 110 mph improvements as a more practical near-term approach to improving travel time, reliability, and ridership. AN - dot:90145 KW - High speed rail KW - Rail transit KW - Transportation corridors KW - Passenger trains KW - Design practices LA - English PB - Northeast Wisconsin Technical College PY - 2010-02-11 TI - High Speed Rail & Existing Rail Corridors M3 - Presentations N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90145 ER -
2025 DMV Customer Satisfaction Survey

May, Matthew

;

McGinnis-Brown, Lantz

2025-05-20 | PDF

The Idaho Transportation Department’s Division of Motor Vehicles underwent major system modernization efforts over the past decade, including expansion of online service delivery and improvements to its DMV web portal. Boise State University’s Idaho Policy Institute assesses whether system changes are meeting customer needs and expectations to bett ...

04/20/2026

Title : 2025 DMV Customer Satisfaction Survey Creator(s) : May, Matthew;McGinnis-Brown, Lantz;Onaindia, Maria;Lang, Hannah; Corporate Creator(s) : Boise State University. Idaho Policy Institute Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-05-20 Report Number : FHWA-ID-25-316 URL : https://rosap.ntl.bts.gov/view/dot/90144 May, Matthew et al. (2025). 2025 DMV Customer Satisfaction Survey. May, Matthew et al. "2025 DMV Customer Satisfaction Survey" (2025) May, Matthew et al. "2025 DMV Customer Satisfaction Survey" , 2025 Export RIS Citation Information. TY - Tech Report AU - May, Matthew AU - McGinnis-Brown, Lantz AU - Onaindia, Maria AU - Lang, Hannah A2 - Boise State University. Idaho Policy Institute A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - The Idaho Transportation Department’s Division of Motor Vehicles underwent major system modernization efforts over the past decade, including expansion of online service delivery and improvements to its DMV web portal. Boise State University’s Idaho Policy Institute assesses whether system changes are meeting customer needs and expectations to better inform prioritization of future technological improvements. This study’s analysis is informed by informal interviews with current DMV personnel, DMV transaction data, and a public opinion survey to a representative random sample of 1,000 Idaho adults. Findings indicate Idahoans score the DMV highly, with 73% rating it “excellent” or “good,” citing friendly and helpful staff and short wait times as the most positive elements of their experience. The study concludes with recommendations related to strategies for improving customer satisfaction levels, as well as DMV communication and marketing efforts. AN - dot:90144 ET - Final Report: 09/26/2024 - 06/26/2025 KW - State motor vehicle departments KW - Customer satisfaction KW - Surveys KW - Web applications KW - Technological innovations KW - Data analysis KW - Policy KW - Strategic planning KW - Recommendations KW - Public opinion KW - Marketing KW - Communications KW - Division of Motor Vehicles (DMV) LA - English PB - Idaho Transportation Department PY - 2025-05-20 SN - FHWA-ID-25-316 TI - 2025 DMV Customer Satisfaction Survey M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90144 ER -
Transportation Management Center (TMC) Operator Performance

United States. Department of Transportation. Federal Highway Administration

2026-03-27 | PDF

Traffic management systems (TMSs) enable agencies to monitor real-time conditions, share information with travelers and partners, manage operational strategies, and actively manage traffic conditions in real-time. TMSs vary significantly in the types of services provided, functions performed, geographic coverage of service areas, types of environme ...

04/20/2026

Title : Transportation Management Center (TMC) Operator Performance Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2026-03-27 Report Number : FHWA-HRT-26-055 URL : https://rosap.ntl.bts.gov/view/dot/90143 United States. Department of Transportation. Federal Highway Administration (2026). Transportation Management Center (TMC) Operator Performance. United States. Department of Transportation. Federal Highway Administration "Transportation Management Center (TMC) Operator Performance" (2026) United States. Department of Transportation. Federal Highway Administration "Transportation Management Center (TMC) Operator Performance" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - Traffic management systems (TMSs) enable agencies to monitor real-time conditions, share information with travelers and partners, manage operational strategies, and actively manage traffic conditions in real-time. TMSs vary significantly in the types of services provided, functions performed, geographic coverage of service areas, types of environments covered, and available resources or staff to manage traffic. Operators within the TMCs of the TMSs may be needed during peak travel periods only, for special events, or 24 h per day and 7 d per week all year. Assessing the performance of TMS operators is critical in that it helps to accomplish the following: Improve overall TMS performance; Enhance staff morale; Improve operational culture; Improve staff retention; Facilitate reviewing actual demand and performance against estimates (e.g., after-action assessment); Support improving workload estimates and needed positions; Facilitate optimal staff scheduling (e.g., reduce overtime) and support resources; Support identifying improvement opportunities; Support developing staff capabilities. AN - dot:90143 KW - Traffic control centers KW - Operators (Persons) KW - Transportation system management KW - Advanced traffic management systems KW - Performance evaluations LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-03-27 SN - FHWA-HRT-26-055 TI - Transportation Management Center (TMC) Operator Performance M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90143 ER -
Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation [TechBrief]

Yang, David Y.

;

Khosravifar, Arash

2025-11-01 | PDF

Management of critical transportation assets such as bridges and tunnels has traditionally focused on condition preservation through carefully planned life-cycle activities within a budgetary limit. Although there are calls to consider various risks from extreme events, existing approaches to risk assessment in transportation asset management rely ...

04/20/2026

Title : Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation [TechBrief] Creator(s) : Yang, David Y.;Khosravifar, Arash;Moug, Diane;Unnikrishnan, Avinash; Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : Portland State University Contributor(s) : Shen, Jian-Dzwan Published Date : 2025-11-01 Report Number : FHWA-HIF-25-012 URL : https://rosap.ntl.bts.gov/view/dot/90142 Yang, David Y. et al. (2025). Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation [TechBrief]. Yang, David Y. et al. "Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation [TechBrief]" (2025) Yang, David Y. et al. "Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation [TechBrief]" , 2025 Export RIS Citation Information. TY - Brief AU - Yang, David Y. AU - Khosravifar, Arash AU - Moug, Diane AU - Unnikrishnan, Avinash A2 - United States. Department of Transportation. Federal Highway Administration A3 - Portland State University A4 - Shen, Jian-Dzwan AB - Management of critical transportation assets such as bridges and tunnels has traditionally focused on condition preservation through carefully planned life-cycle activities within a budgetary limit. Although there are calls to consider various risks from extreme events, existing approaches to risk assessment in transportation asset management rely heavily on engineering judgement and past experience. This subjective and empirical approach to risk assessment contrasts to more objective methods that are underpinned by quantitative models of hazards, vulnerabilities, and consequences. Nonetheless, these quantitative models do not fully consider the effects of deterioration on structural vulnerability under extreme events, thus hindering their direct application in transportation asset management. The primary goal of this research is to facilitate risk-based transportation asset management using (a) objective and consistent risk assessment and (b) performance risk analysis for large-scale transportation networks. Three major tasks were conducted: (a) establish the general framework for objective risk assessment of deteriorating assets; (b) achieve objective agency risk assessment in transportation asset management systems; (c) develop effective and efficient methods for network-level performance risk assessment. AN - dot:90142 KW - Risk assessment KW - Safety analysis KW - Performance based specifications KW - Asset management KW - Bridge management systems KW - State departments of transportation LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2025-11-01 SN - FHWA-HIF-25-012 TI - Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation [TechBrief] M3 - Brief N1 - United States N1 - 693JJ321C000030 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90142 ER -
FHWA Computation Procedure for the Transportation Performance Management Bridge Condition Measures: Based on the Specifications for the National Bridge Inventory (SNBI)

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

2025-11-03 | PDF

This document presents the steps for Federal Highway Administration (FHWA) to compute bridge condition measures using the National Bridge Inventory (NBI) data based on the Specifications for the National Bridge Inventory (SNBI) for the purpose of determining: (1) the minimum bridge condition level for each State (23 Code of Federal Regulations (CFR ...

04/20/2026

Title : FHWA Computation Procedure for the Transportation Performance Management Bridge Condition Measures: Based on the Specifications for the National Bridge Inventory (SNBI) Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Published Date : 2025-11-03 Report Number : FHWA-HIF-25-010 URL : https://rosap.ntl.bts.gov/view/dot/90141 United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure (2025). FHWA Computation Procedure for the Transportation Performance Management Bridge Condition Measures: Based on the Specifications for the National Bridge Inventory (SNBI). United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure "FHWA Computation Procedure for the Transportation Performance Management Bridge Condition Measures: Based on the Specifications for the National Bridge Inventory (SNBI)" (2025) United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure "FHWA Computation Procedure for the Transportation Performance Management Bridge Condition Measures: Based on the Specifications for the National Bridge Inventory (SNBI)" , 2025 Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure AB - This document presents the steps for Federal Highway Administration (FHWA) to compute bridge condition measures using the National Bridge Inventory (NBI) data based on the Specifications for the National Bridge Inventory (SNBI) for the purpose of determining: (1) the minimum bridge condition level for each State (23 Code of Federal Regulations (CFR) 490.411); and (2) whether or not a State DOT has made significant progress towards the achievement of its bridge condition targets (23 CFR 490.109). Please note that the methods described in this document apply to bridge measure computations for the "2026 NBI dataset" and subsequent years' datasets. For the computation methods for the "2025 NBI dataset" and all earlier, please refer to the document titled "FHWA Computation Procedure for the Bridge Condition Measures," dated April 2018, (referred to as the “Coding Guide-based Procedure Document” in this document). The steps described in this document includes the measure computation procedure specified in 23 CFR 490.409. The definition of "bridges" is provided in 23 CFR 490.101 and 650.305. Consistent with the defined definition in the CFR, the term "bridge" in this document encompasses both bridges and bridge-length culverts. AN - dot:90141 KW - Bridge management systems KW - Inventory KW - Performance measurement KW - Bridge performance LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure PY - 2025-11-03 SN - FHWA-HIF-25-010 TI - FHWA Computation Procedure for the Transportation Performance Management Bridge Condition Measures: Based on the Specifications for the National Bridge Inventory (SNBI) M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90141 ER -
FHWA Bridge Preservation Expert Task Group: Strategic Plan FY2025-FY2030

United States. Department of Transportation. Federal Highway Administration

2025-11-07 | PDF

The FHWA Bridge Preservation Expert Task Group Strategic Plan identifies strategic goals, strategies, and actions in the area of highway bridge preservation by working collaboratively with Federal, State, and local agencies, industry, and academia.

04/20/2026

Title : FHWA Bridge Preservation Expert Task Group: Strategic Plan FY2025-FY2030 Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Ailaney, Raj Published Date : 2025-11-07 Report Number : FHWA-HIF-25-011 URL : https://rosap.ntl.bts.gov/view/dot/90140 United States. Department of Transportation. Federal Highway Administration (2025). FHWA Bridge Preservation Expert Task Group: Strategic Plan FY2025-FY2030. United States. Department of Transportation. Federal Highway Administration "FHWA Bridge Preservation Expert Task Group: Strategic Plan FY2025-FY2030" (2025) United States. Department of Transportation. Federal Highway Administration "FHWA Bridge Preservation Expert Task Group: Strategic Plan FY2025-FY2030" , 2025 Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Highway Administration A4 - Ailaney, Raj AB - The FHWA Bridge Preservation Expert Task Group Strategic Plan identifies strategic goals, strategies, and actions in the area of highway bridge preservation by working collaboratively with Federal, State, and local agencies, industry, and academia. AN - dot:90140 KW - Strategic planning KW - Preservation KW - Bridges KW - Continuing education KW - Cooperation LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2025-11-07 SN - FHWA-HIF-25-011 TI - FHWA Bridge Preservation Expert Task Group: Strategic Plan FY2025-FY2030 M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90140 ER -
UAS 2.0: Innovative Infrastructure Management

United States. Department of Transportation. Federal Highway Administration

2026-02-20 | PDF

After the success of EDC-5, which led to drone use in all 50 States, the focus is now on improving how these tools are used. New features include remote docking, better work zone lighting, and more accurate performance to help transportation assets, like bridges and roads, last longer and perform more reliably. Many transportation agencies face ong ...

04/20/2026

Title : UAS 2.0: Innovative Infrastructure Management Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Gray, James Published Date : 2026-02-20 Report Number : FHWA-26-CAI-002 URL : https://rosap.ntl.bts.gov/view/dot/90139 United States. Department of Transportation. Federal Highway Administration (2026). UAS 2.0: Innovative Infrastructure Management. United States. Department of Transportation. Federal Highway Administration "UAS 2.0: Innovative Infrastructure Management" (2026) United States. Department of Transportation. Federal Highway Administration "UAS 2.0: Innovative Infrastructure Management" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Gray, James AB - After the success of EDC-5, which led to drone use in all 50 States, the focus is now on improving how these tools are used. New features include remote docking, better work zone lighting, and more accurate performance to help transportation assets, like bridges and roads, last longer and perform more reliably. Many transportation agencies face ongoing challenges in managing and maintaining infrastructure safely and efficiently. Traditional inspection methods often rely on manual field work, which can be time-consuming, costly, and difficult to perform in low-light or hard-to-reach areas, such as the underside of bridges. These activities can place both staff and the traveling public at risk and may require lane closures that disrupt traffic. Agencies may also need to manage changing equipment, staff turnover, and growing amounts of inspection data, increasing the chance for delays and error. Other routine activities, such as herbicide application and nighttime work zone lighting, can require a lot of resources, fuel, and materials. While UAS are now used by transportation agencies in all 50 States, there is a growing need to move beyond basic drone operations and use these tools to address gaps in current infrastructure management practices. AN - dot:90139 KW - Technological innovations KW - Infrastructure KW - Drones KW - Unmanned aircraft systems KW - Inspection LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-20 SN - FHWA-26-CAI-002 TI - UAS 2.0: Innovative Infrastructure Management M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90139 ER -
Subsurface Utility Engineering (SUE)

United States. Department of Transportation. Federal Highway Administration

2026-02-17 | PDF

Highway designers in the United States often do not have reliable information about what lies underground where projects are planned. Unexpected conflicts during construction are one of the leading causes of delays and cost overruns. Subsurface Utility Engineering (SUE) helps solve this problem by using engineering, surveying, and underground-detec ...

04/20/2026

Title : Subsurface Utility Engineering (SUE) Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Johnston, Julie;Wellman, Clayton;Mooney, Robert; Published Date : 2026-02-17 Report Number : FHWA-26-CAI-003 URL : https://rosap.ntl.bts.gov/view/dot/90138 United States. Department of Transportation. Federal Highway Administration (2026). Subsurface Utility Engineering (SUE). United States. Department of Transportation. Federal Highway Administration "Subsurface Utility Engineering (SUE)" (2026) United States. Department of Transportation. Federal Highway Administration "Subsurface Utility Engineering (SUE)" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Johnston, Julie A4 - Wellman, Clayton A4 - Mooney, Robert AB - Highway designers in the United States often do not have reliable information about what lies underground where projects are planned. Unexpected conflicts during construction are one of the leading causes of delays and cost overruns. Subsurface Utility Engineering (SUE) helps solve this problem by using engineering, surveying, and underground-detection tools to locate and map utilities early in the planning and design process, reducing the risk of costly surprises later. AN - dot:90138 KW - Underground structures KW - Underground utility lines KW - Utilities engineering KW - Transportation planning LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-17 SN - FHWA-26-CAI-003 TI - Subsurface Utility Engineering (SUE) M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90138 ER -
Every Day Counts: Overview

United States. Department of Transportation. Federal Highway Administration

2026-02-24 | PDF

EDC is a State-based model that identifies and rapidly deploys proven, yet underutilized innovations to shorten the project delivery process, enhance roadway safety, reduce traffic congestion, or integrate automation. Proven innovations promoted through EDC facilitate greater efficiency at the State and local levels, saving time, money, and resourc ...

04/20/2026

Title : Every Day Counts: Overview Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Rosa, Maria Published Date : 2026-02-24 URL : https://rosap.ntl.bts.gov/view/dot/90137 United States. Department of Transportation. Federal Highway Administration (2026). Every Day Counts: Overview. United States. Department of Transportation. Federal Highway Administration "Every Day Counts: Overview" (2026) United States. Department of Transportation. Federal Highway Administration "Every Day Counts: Overview" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Rosa, Maria AB - EDC is a State-based model that identifies and rapidly deploys proven, yet underutilized innovations to shorten the project delivery process, enhance roadway safety, reduce traffic congestion, or integrate automation. Proven innovations promoted through EDC facilitate greater efficiency at the State and local levels, saving time, money, and resources that can be used to deliver more projects. The EDC program has made a significant positive impact in accelerating the deployment of innovations and in building a culture of innovation within the transportation community. Since the inception of EDC, each state has used 26 or more of the 61 promoted innovations, and some states have adopted more than 45. Many of these innovations have become mainstream practices across the country. By advancing 21st century solutions, the transportation community is making every day count to ensure our roads and bridges are built better, faster, and smarter. AN - dot:90137 KW - Innovation KW - Cooperation KW - Coordination KW - Technological innovations KW - Deployment KW - Project delivery KW - Highway safety KW - Traffic congestion KW - Automation LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-24 TI - Every Day Counts: Overview M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90137 ER -
Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report

Egge, Mark

;

Miller, Bryce C.

2024-07-24 | PDF

This report describes a process for estimating AADT on non-Federal-Aid public roads (collectively called “off-system” roads) in Idaho. This will provide additional data for ITD and regional and local transportation agencies to conduct analysis, and it will meet new federal requirements for estimating AADT on all public roads. The report includes a ...

04/20/2026

Title : Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report Creator(s) : Egge, Mark;Miller, Bryce C.; Corporate Creator(s) : High Street Consulting Group (HSCG) Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-07-24 Report Number : FHWA-ID-24-314 URL : https://rosap.ntl.bts.gov/view/dot/90136 Egge, Mark and Miller, Bryce C. (2024). Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report. Egge, Mark and Miller, Bryce C. "Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report" (2024) Egge, Mark and Miller, Bryce C. "Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report" , 2024 Export RIS Citation Information. TY - Tech Report AU - Egge, Mark AU - Miller, Bryce C. A2 - High Street Consulting Group (HSCG) A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - This report describes a process for estimating AADT on non-Federal-Aid public roads (collectively called “off-system” roads) in Idaho. This will provide additional data for ITD and regional and local transportation agencies to conduct analysis, and it will meet new federal requirements for estimating AADT on all public roads. The report includes a review of federal guidance, documentation of ITD’s current AADT estimation process, an overview of spatial interpolation via Kriging, a user guide for the Rural AADT Estimation toolbox in Esri’s ArcGIS Pro software environment, and end materials including works cited, a list of independent variables considered, and the Python code used to run the toolbox. AN - dot:90136 ET - Final Report [05/01/2024 – 05/31/2025] KW - Annual average daily traffic KW - Traffic volume KW - Traffic estimation KW - Highways KW - Federal aid KW - Local transportation KW - Interpolation KW - Geospatial data KW - Software packages KW - Literature reviews KW - Validation KW - Research reports KW - Public roads KW - non-Federal-Aid highways local roads LA - English PB - Idaho Transportation Department PY - 2024-07-24 SN - FHWA-ID-24-314 TI - Off-System Public Roads Annual Average Daily Traffic (AADT) Estimation and Validation Tools: Literature Review and Research Report M3 - Tech Report N1 - United States N1 - T003165 UR - https://rosap.ntl.bts.gov/view/dot/90136 ER -
Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality

Zhai, Huachun

;

Russell, Erin

2024-06-01 | PDF

The Idaho Degradation Test was modified to standardize the procedure and improve the repeatability of the test. An evaluation of the temperature and time needed for sample preparation was conducted to accelerate the test process. Based on a national survey conducted by the research group, the Durability Index and the Micro-Deval abrasion loss tests ...

04/20/2026

Title : Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality Creator(s) : Zhai, Huachun;Russell, Erin;Munger, John;Sale, Collin;Lu, Yang;Wang, Donglei; Corporate Creator(s) : Idaho Asphalt Supply, Inc.;Boise State University; Corporate Contributor(s) : Idaho Transportation Department;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-06-01 Report Number : FHWA-ID-24-313 URL : https://rosap.ntl.bts.gov/view/dot/90135 Zhai, Huachun et al. (2024). Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality. Zhai, Huachun et al. "Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality" (2024) Zhai, Huachun et al. "Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality" , 2024 Export RIS Citation Information. TY - Tech Report AU - Zhai, Huachun AU - Russell, Erin AU - Munger, John AU - Sale, Collin AU - Lu, Yang AU - Wang, Donglei A2 - Idaho Asphalt Supply, Inc. A2 - Boise State University A3 - Idaho Transportation Department A3 - United States. Department of Transportation. Federal Highway Administration AB - The Idaho Degradation Test was modified to standardize the procedure and improve the repeatability of the test. An evaluation of the temperature and time needed for sample preparation was conducted to accelerate the test process. Based on a national survey conducted by the research group, the Durability Index and the Micro-Deval abrasion loss tests were selected as supplement tests. Twenty-five samples from sixteen aggregate sources selected by the Districts throughout the State were evaluated using the Modified Idaho Degradation Test (MIDT), the Durability Index, and the Micro-Deval Tests for both coarse and fine aggregates. The X-ray Diffraction (XRD) test, the petrographic analysis, and the methylene blue test were used to identify the mineralogy of the aggregates, the clay content, and the reactivity of the clay components. The results indicated by the change in P200 values before and after the MIDT (DP200) values showed similar repeatability to the sieve test using a uniform gradation. The effects of clay on the SE values in the MIDT were highly rock-type dependent. Although the Durability Index (Df) was also determined using the SE test, there were no strong correlations between the Durability Index and the SE values from the MIDT. While the percentages of abrasion loss of the coarse aggregate lacked a relationship to the DP200 values, there was a strong correlation between the abrasion loss of the fine aggregates and DP200 (R2 ~0.94). This strong correlation was used to calculate the recommended acceptable specification values for DP200. AN - dot:90135 ET - Final Report: 05/24/2023 – 07/24/2024 KW - Aggregate tests KW - Materials KW - Specifications KW - Test procedures KW - Degradation failures KW - Durability tests KW - Petrography KW - Clay LA - English PB - Idaho Transportation Department PY - 2024-06-01 SN - FHWA-ID-24-313 TI - Study of the Idaho Degradation Test and Other Methods for Assessing Aggregate Quality M3 - Tech Report N1 - United States N1 - T002983 UR - https://rosap.ntl.bts.gov/view/dot/90135 ER -
Development of a Research Roadmap for ITD’s Bridge Section

Taylor, Dustin ;

Ebrahimpour, Arya

2024-06-01 | PDF

The Idaho Transportation Department (ITD) Bridge Section has been at the forefront of advancing bridge materials, design, construction, preservation, and inspection in Idaho through sponsored research. However, the department acknowledges the necessity of evolving from past ad hoc research requests to a more proactive and systematic approach. The a ...

04/20/2026

Title : Development of a Research Roadmap for ITD’s Bridge Section Creator(s) : Taylor, Dustin;Ebrahimpour, Arya;Ibrahim, Ahmed;Mashal, Mustafa; Corporate Creator(s) : Idaho State University Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-06-01 Report Number : FHWA-ID-24-312 URL : https://rosap.ntl.bts.gov/view/dot/90134 Taylor, Dustin et al. (2024). Development of a Research Roadmap for ITD’s Bridge Section. Taylor, Dustin et al. "Development of a Research Roadmap for ITD’s Bridge Section" (2024) Taylor, Dustin et al. "Development of a Research Roadmap for ITD’s Bridge Section" , 2024 Export RIS Citation Information. TY - Tech Report AU - Taylor, Dustin AU - Ebrahimpour, Arya AU - Ibrahim, Ahmed AU - Mashal, Mustafa A2 - Idaho State University A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - The Idaho Transportation Department (ITD) Bridge Section has been at the forefront of advancing bridge materials, design, construction, preservation, and inspection in Idaho through sponsored research. However, the department acknowledges the necessity of evolving from past ad hoc research requests to a more proactive and systematic approach. The aim is to align research efforts, ensuring they complement and build on each other for more impactful outcomes. To achieve this, the following steps were taken: (1) a detailed assessment of ITD's deficiently rated bridge inventory including individual element condition states, (2) a nation-wide department of transportation (DOT) funding and research survey, and (3) a comprehensive analysis of both past and ongoing DOT-financed research projects over the past 5 years. This information was used to supplement ITD’s technical advisory committee expertise to generate a new list of high impact research queries tailored to Idaho’s specific needs and interests. This list was then organized by priority with the top six being chosen for additional investigation. By adopting this proactive strategy, ITD aims to enhance the efficiency and effectiveness of its bridge-related research endeavors, ultimately contributing to safer and more resilient transportation infrastructure. AN - dot:90134 ET - Final Report - 06/15/2023 – 06/15/2024 KW - Bridges KW - Recommendations KW - Research management KW - Highways KW - Planning KW - Forecasting KW - Surveys KW - Financing KW - Inventory KW - Infrastructure KW - Bridge construction KW - Preservation LA - English PB - Idaho Transportation Department PY - 2024-06-01 SN - FHWA-ID-24-312 TI - Development of a Research Roadmap for ITD’s Bridge Section M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90134 ER -
End-Around Taxiway Screen Evaluation

Patterson, James W.

2007-03-01 | PDF

The Federal Aviation Administration (FAA) Airport Safety Technology Research and Development Section was tasked to design and evaluate an end-around taxiway (EAT) visual screen to mask aircraft using the EAT. This evaluation effort was conducted to investigate the most conspicuous material, configuration, pattern, color, and lighting methods that w ...

04/20/2026

Title : End-Around Taxiway Screen Evaluation Creator(s) : Patterson, James W. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2007-03-01 Report Number : DOT/FAA/AR-TN06/59 URL : https://rosap.ntl.bts.gov/view/dot/90133 Patterson, James W. (2007). End-Around Taxiway Screen Evaluation. Patterson, James W. "End-Around Taxiway Screen Evaluation" (2007) Patterson, James W. "End-Around Taxiway Screen Evaluation" , 2007 Export RIS Citation Information. TY - Tech Report AU - Patterson, James W. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - The Federal Aviation Administration (FAA) Airport Safety Technology Research and Development Section was tasked to design and evaluate an end-around taxiway (EAT) visual screen to mask aircraft using the EAT. This evaluation effort was conducted to investigate the most conspicuous material, configuration, pattern, color, and lighting methods that would make the EAT visual screen visible to pilots operating on a runway equipped with an EAT. The visual screen should be visible during both daytime and nighttime conditions and should be adaptable for use at airports that have already constructed, or are planning to construct, this type of taxiway. This report describes the research, development, and evaluation efforts that were performed to determine the best design characteristics for the visual screen. The evaluation was conducted through a series of comparative evaluations at the Atlantic City International Airport, including a final evaluation involving pilots of various aviation backgrounds. The results of this evaluation showed that a screen height of 13 feet was satisfactory; the color and size combination of a 12-foot-wide, red and white diagonal striping proved most effective; and that the use of engineering-grade reflective material prevents the need for additional external lighting to enhance screen visibility at night. Additional findings were made regarding effective access for emergency equipment and verification that the effectiveness of the screen was not degraded by tilting the screen surface 14 degrees to avoid interference with airport-based radar systems. Ninety-eight percent of the subject pilots involved ranked the proposed screen design as being effective in performing the function of masking an aircraft on the EAT. AN - dot:90133 ET - Technical Notes KW - Airport runways KW - Design KW - Evaluation KW - Screens KW - Taxiways LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-03-01 SN - DOT/FAA/AR-TN06/59 TI - End-Around Taxiway Screen Evaluation M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90133 ER -
Combining In-Situ and Remote Sensing-Based Monitoring Methods to Improve the Efficiency and Accuracy of Landslide Monitoring Activities

Delparte, Donna M.

;

Mahar, James

2025-02-01 | PDF

Repeat LiDAR or photogrammetry surveys for conducting temporal and spatial studies of mass movements are an emerging part of landslide hazard monitoring research, including the use of sensors aboard small Unmanned Aircraft Systems (UAS). The ability to measure change at a site over time can be an important asset in identifying slopes that pose a si ...

04/20/2026

Title : Combining In-Situ and Remote Sensing-Based Monitoring Methods to Improve the Efficiency and Accuracy of Landslide Monitoring Activities Creator(s) : Delparte, Donna M.;Mahar, James;Butterworth, Ashley;Belt, Matt;Drinkall, Dana;Brown, Betty; Corporate Creator(s) : Idaho State University Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-02-01 Report Number : FHWA-ID-25-311 URL : https://rosap.ntl.bts.gov/view/dot/90132 Delparte, Donna M. et al. (2025). Combining In-Situ and Remote Sensing-Based Monitoring Methods to Improve the Efficiency and Accuracy of Landslide Monitoring Activities. Delparte, Donna M. et al. "Combining In-Situ and Remote Sensing-Based Monitoring Methods to Improve the Efficiency and Accuracy of Landslide Monitoring Activities" (2025) Delparte, Donna M. et al. "Combining In-Situ and Remote Sensing-Based Monitoring Methods to Improve the Efficiency and Accuracy of Landslide Monitoring Activities" , 2025 Export RIS Citation Information. TY - Tech Report AU - Delparte, Donna M. AU - Mahar, James AU - Butterworth, Ashley AU - Belt, Matt AU - Drinkall, Dana AU - Brown, Betty A2 - Idaho State University A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - Repeat LiDAR or photogrammetry surveys for conducting temporal and spatial studies of mass movements are an emerging part of landslide hazard monitoring research, including the use of sensors aboard small Unmanned Aircraft Systems (UAS). The ability to measure change at a site over time can be an important asset in identifying slopes that pose a significant hazard to people and infrastructure, especially when paired with on-site inclinometer data. Data acquisition of LiDAR with UAS provides numerous benefits compared to other traditional airborne or terrestrial platforms. Our overall research approach was to collect and integrate geotechnical, landslide geometry, displacement, weather and surface site condition data with UAS remotely sensed data for evaluation of landslide hazards at four landslide areas. Accurate repeat LiDAR studies can be difficult to achieve due to inherent issues from using different platforms and sensors including the use of different vertical datum such as geoids or ellipsoid reference systems, poor co-registration of flightlines, differences in data quality, resolution, or georeferencing software, classification changes, and changes in post processing steps. This study provides recommendations for data acquisition and processing protocols to overcome registration limitations, reduce uncertainty in change detection models, and describe best practices for monitoring landslide movement and characterization. AN - dot:90132 ET - [Final or Interim] Report 05/08/2023 - 02/08/2025 KW - Landslides KW - Unmanned aircraft systems KW - Laser radar KW - Photogrammetry KW - Best practices KW - Field tests KW - Sensors KW - Data analysis KW - Transportation planning KW - Slope stability KW - M3C2 LA - English PB - Idaho Transportation Department PY - 2025-02-01 SN - FHWA-ID-25-311 TI - Combining In-Situ and Remote Sensing-Based Monitoring Methods to Improve the Efficiency and Accuracy of Landslide Monitoring Activities M3 - Tech Report N1 - United States N1 - T002986 UR - https://rosap.ntl.bts.gov/view/dot/90132 ER -
Idaho Alive at 25 Young Driver Education Program Evaluation

May, Matthew

;

McGinnis-Brown, Lantz

2025-12-01 | PDF

Since 2009, the Idaho Transportation Department (ITD) has implemented the Alive at 25 national program in Idaho. Each year, thousands of young Idaho drivers participate in the program to learn how to be better and safer on the road. To date, the impact of this program on driver behaviors and attitudes is unknown. ITD contracted Boise State Universi ...

04/20/2026

Title : Idaho Alive at 25 Young Driver Education Program Evaluation Creator(s) : May, Matthew;McGinnis-Brown, Lantz;Onaindia, Maria;Lang, Hannah; Corporate Creator(s) : Boise State University. Idaho Policy Institute Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-12-01 Report Number : FHWA-ID-25-308 URL : https://rosap.ntl.bts.gov/view/dot/90131 May, Matthew et al. (2025). Idaho Alive at 25 Young Driver Education Program Evaluation. May, Matthew et al. "Idaho Alive at 25 Young Driver Education Program Evaluation" (2025) May, Matthew et al. "Idaho Alive at 25 Young Driver Education Program Evaluation" , 2025 Export RIS Citation Information. TY - Tech Report AU - May, Matthew AU - McGinnis-Brown, Lantz AU - Onaindia, Maria AU - Lang, Hannah A2 - Boise State University. Idaho Policy Institute A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - Since 2009, the Idaho Transportation Department (ITD) has implemented the Alive at 25 national program in Idaho. Each year, thousands of young Idaho drivers participate in the program to learn how to be better and safer on the road. To date, the impact of this program on driver behaviors and attitudes is unknown. ITD contracted Boise State University’s Idaho Policy Institute (IPI) to study the program’s implementation over the past 13 years to better understand how the course is delivered in Idaho and how similar courses are implemented in other states. IPI analyzed data collected through 24 qualitative interviews, 24 years of crash and citation data, and three quantitative surveys of Alive at 25 course participants. Analysis suggests Alive at 25 is viewed favorably by both instructors and participants; demand for virtual course options is under-served; method of instruction does not appreciably impact student attitudes or behaviors; certain elements increase the likelihood of success in behavioral change programs; Alive at 25 curriculum is in needed-flux; the program’s impact on citation and crash occurrence is short-term; and attitudinal changes among participants appear similarly short-term. AN - dot:90131 ET - Final Report: 03/06/2024 - 12/07/2025 KW - Young adults KW - High risk drivers KW - Driving behavior KW - Evaluation KW - Defensive drivers KW - Programmed instruction KW - Crashes KW - Traffic citations KW - Data collection KW - Interviewing KW - Alive at 25 KW - young drivers KW - risky behaviors KW - vehicle crashes KW - program evaluation KW - course instruction LA - English PB - Idaho Transportation Department PY - 2025-12-01 SN - FHWA-ID-25-308 TI - Idaho Alive at 25 Young Driver Education Program Evaluation M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90131 ER -
Guidance on Evaluating Quality and Determining Return on Investment for Internal and Third-Party Data Research Project

Van Dyke, Rebecca

;

Kahl, Donner

2024-12-01 | PDF

ITD recognizes the challenge of selecting the best approach to making decisions around which data products are worth investing in and which ones may appear promising on the surface, but actually add little value to the agency’s business processes. In light of these challenges, ITD launched a research project to explore methods for evaluating the re ...

04/20/2026

Title : Guidance on Evaluating Quality and Determining Return on Investment for Internal and Third-Party Data Research Project Creator(s) : Van Dyke, Rebecca;Kahl, Donner;Egge, Mark;Gonzalez, Isaac; Corporate Creator(s) : High Street Consulting Group (HSCG) Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2024-12-01 Report Number : FHWA-ID-24-307 URL : https://rosap.ntl.bts.gov/view/dot/90130 Van Dyke, Rebecca et al. (2024). Guidance on Evaluating Quality and Determining Return on Investment for Internal and Third-Party Data Research Project. Van Dyke, Rebecca et al. "Guidance on Evaluating Quality and Determining Return on Investment for Internal and Third-Party Data Research Project" (2024) Van Dyke, Rebecca et al. "Guidance on Evaluating Quality and Determining Return on Investment for Internal and Third-Party Data Research Project" , 2024 Export RIS Citation Information. TY - Tech Report AU - Van Dyke, Rebecca AU - Kahl, Donner AU - Egge, Mark AU - Gonzalez, Isaac A2 - High Street Consulting Group (HSCG) A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - ITD recognizes the challenge of selecting the best approach to making decisions around which data products are worth investing in and which ones may appear promising on the surface, but actually add little value to the agency’s business processes. In light of these challenges, ITD launched a research project to explore methods for evaluating the return on investment (ROI) of different data investment opportunities to aid in their decision-making processes. The goal of this research was to create both processes and tools that will enable ITD to make more standardized, objective decisions around data investments. This report covers the research findings that informed the development of two new data asset evaluation tools that ITD can use to vet data investment opportunities, avoid the potential data purchasing pitfalls, and present comprehensive documentation that thoroughly substantiates a decision to move forward with (or rule out) what can be significant resource outlays. AN - dot:90130 ET - Final Report: 01/02/2024 – 12/31/2024 KW - Return on investment KW - Benefit cost analysis KW - Data management KW - Decision making KW - Evaluation KW - Quality control KW - data assets KW - data quality KW - data investment LA - English PB - Idaho Transportation Department PY - 2024-12-01 SN - FHWA-ID-24-307 TI - Guidance on Evaluating Quality and Determining Return on Investment for Internal and Third-Party Data Research Project M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90130 ER -
Best Practice in Adhesive-Bonded Structures and Repairs

Davis, Max ;

Tomblin, John

2007-04-01 | PDF

The opinions expressed in this technical note were presented at the Federal Aviation Administration (FAA) Bonded Structures workshop in 2004. The FAA, realizing their value, commissioned a written record of these observations and recommendations. These observations and recommendations represent the experiences, some anecdotal, in the application an ...

04/20/2026

Title : Best Practice in Adhesive-Bonded Structures and Repairs Creator(s) : Davis, Max;Tomblin, John; Corporate Creator(s) : National Institute for Aviation Research (U.S.);Wichita State University; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2007-04-01 Report Number : DOT/FAA/AR-TN06/57 URL : https://rosap.ntl.bts.gov/view/dot/90129 Davis, Max and Tomblin, John (2007). Best Practice in Adhesive-Bonded Structures and Repairs. Davis, Max and Tomblin, John "Best Practice in Adhesive-Bonded Structures and Repairs" (2007) Davis, Max and Tomblin, John "Best Practice in Adhesive-Bonded Structures and Repairs" , 2007 Export RIS Citation Information. TY - Tech Report AU - Davis, Max AU - Tomblin, John A2 - National Institute for Aviation Research (U.S.) A2 - Wichita State University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development AB - The opinions expressed in this technical note were presented at the Federal Aviation Administration (FAA) Bonded Structures workshop in 2004. The FAA, realizing their value, commissioned a written record of these observations and recommendations. These observations and recommendations represent the experiences, some anecdotal, in the application and maintenance of bonded structures on one group. This document does not represent a comprehensive survey and analysis of the failures or best corrective actions for bonded structures, but data that resulted from real-world applications and experience with disbands and other adhesive failures in structural applications. AN - dot:90129 ET - Technical Notes KW - Adhesion KW - Repairing KW - Surface preparation KW - Materials adaptation and use KW - Aviation LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-04-01 SN - DOT/FAA/AR-TN06/57 TI - Best Practice in Adhesive-Bonded Structures and Repairs M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90129 ER -
Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways

Al-Deek, Haitham

;

Sandt, Adrian

2025-05-01 | PDF

This project investigated the extent and characteristics of wrong-way driving (WWD) on Idaho limited access roadways. WWD crash (WWC) counts have been increasing in recent years, especially on I-84 and I-90. A model was developed to identify WWD hotspot segments by predicting WWCs based on non-crash WWD citations, exit design characteristics, traff ...

04/20/2026

Title : Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways Creator(s) : Al-Deek, Haitham;Sandt, Adrian; Corporate Creator(s) : University of Central Florida Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-05-01 Report Number : RP306 URL : https://rosap.ntl.bts.gov/view/dot/90128 Al-Deek, Haitham and Sandt, Adrian (2025). Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways. Al-Deek, Haitham and Sandt, Adrian "Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways" (2025) Al-Deek, Haitham and Sandt, Adrian "Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways" , 2025 Export RIS Citation Information. TY - Tech Report AU - Al-Deek, Haitham AU - Sandt, Adrian A2 - University of Central Florida A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - This project investigated the extent and characteristics of wrong-way driving (WWD) on Idaho limited access roadways. WWD crash (WWC) counts have been increasing in recent years, especially on I-84 and I-90. A model was developed to identify WWD hotspot segments by predicting WWCs based on non-crash WWD citations, exit design characteristics, traffic volumes, and area type. An optimization algorithm was then utilized to identify specific exits within and outside of the hotspots for optimal deployment of WWD countermeasures. The optimization algorithm identified the 81 optimal exit ramps for countermeasure deployment and was shown to improve WWD reduction by 60% compared to only deploying countermeasures in the hotspot segments. Based on the findings from this project, it is recommended for the Idaho Transportation Department to prioritize deployment of WWD countermeasures at these 81 optimal ramps, consider lighting and signage improvements at exit ramp terminals and crossing streets, install treatments at crossing roads to reduce left-turning WWD vehicles where possible, increase law enforcement presence on I-90 and at nighttime if possible to reduce WWCs, standardize the reporting practices for WWCs and WWD citations, collect WWD dispatch reports throughout the state, and conduct additional research on mainline and construction crossover WWCs. AN - dot:90128 ET - Final Report KW - Wrong way driving KW - Crashes KW - Risk KW - Countermeasures KW - Optimization KW - High risk locations KW - High speed track KW - Hotspot Modeling LA - English PB - Idaho Transportation Department PY - 2025-05-01 SN - RP306 TI - Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90128 ER -
Evaluation of the Reproducibility of the FAA Oil Burner Fire Test for Aircraft Seat Cushions

Cahill, Patricia

2007-03-01 | PDF

The Federal Aviation Administration oil burner round-robin fire tests were conducted on aircraft seat cushions to determine the status of the test facilities that perform the tests. Two sets of fire-hardened foam and one set of fire-blocked foam test seat cushions were evaluated. The data showed that the weight loss and burn lengths were generally ...

04/20/2026

Title : Evaluation of the Reproducibility of the FAA Oil Burner Fire Test for Aircraft Seat Cushions Creator(s) : Cahill, Patricia Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2007-03-01 Report Number : DOT/FAA/AR-TN06/55 URL : https://rosap.ntl.bts.gov/view/dot/90127 Cahill, Patricia (2007). Evaluation of the Reproducibility of the FAA Oil Burner Fire Test for Aircraft Seat Cushions. Cahill, Patricia "Evaluation of the Reproducibility of the FAA Oil Burner Fire Test for Aircraft Seat Cushions" (2007) Cahill, Patricia "Evaluation of the Reproducibility of the FAA Oil Burner Fire Test for Aircraft Seat Cushions" , 2007 Export RIS Citation Information. TY - Tech Report AU - Cahill, Patricia A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development AB - The Federal Aviation Administration oil burner round-robin fire tests were conducted on aircraft seat cushions to determine the status of the test facilities that perform the tests. Two sets of fire-hardened foam and one set of fire-blocked foam test seat cushions were evaluated. The data showed that the weight loss and burn lengths were generally consistent in each individual laboratory. The most significant difference among all the laboratories was seen in the weight loss and burn lengths of the fire-blocked foam seat cushion. For two of the cushions there were a significant number of the laboratories that passed and failed the 10% average weight loss criteria. AN - dot:90127 ET - Technical Notes KW - Oil burners KW - Handbooks KW - Weight measurement KW - Seats KW - Percent weight loss KW - Burn length LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-03-01 SN - DOT/FAA/AR-TN06/55 TI - Evaluation of the Reproducibility of the FAA Oil Burner Fire Test for Aircraft Seat Cushions M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90127 ER -
Idaho Truck Parking Research Project

Bucklew, Keith ;

Anater, Patrick

2023-11-01 | PDF

Truck parking issues stem from the lack of available designated parking at convenient locations, and Federal Hours of Service (HOS) regulations of the Federal Motor Carrier Safety Administration (FMCSA) that require drivers to rest at specific intervals. Truck parking capacity has not kept up with the demand, leaving truck drivers with few options ...

04/20/2026

Title : Idaho Truck Parking Research Project Creator(s) : Bucklew, Keith;Anater, Patrick;Flaskou, Mania;Gawade, Makarand; Corporate Creator(s) : HDR Engineering Corporate Contributor(s) : Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program;United States. Department of Transportation. Federal Highway Administration; Published Date : 2023-11-01 Report Number : FHWA-ID-23-300 URL : https://rosap.ntl.bts.gov/view/dot/90126 Bucklew, Keith et al. (2023). Idaho Truck Parking Research Project. Bucklew, Keith et al. "Idaho Truck Parking Research Project" (2023) Bucklew, Keith et al. "Idaho Truck Parking Research Project" , 2023 Export RIS Citation Information. TY - Tech Report AU - Bucklew, Keith AU - Anater, Patrick AU - Flaskou, Mania AU - Gawade, Makarand A2 - HDR Engineering A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program A3 - United States. Department of Transportation. Federal Highway Administration AB - Truck parking issues stem from the lack of available designated parking at convenient locations, and Federal Hours of Service (HOS) regulations of the Federal Motor Carrier Safety Administration (FMCSA) that require drivers to rest at specific intervals. Truck parking capacity has not kept up with the demand, leaving truck drivers with few options at the end of their shift or while waiting for pick-up and delivery windows. The Idaho Transportation Department (ITD) Truck Parking Research Project aims to inform the Statewide Freight Plan and provide solutions and recommendations to solve current and future truck parking demands to support freight movement and Idaho’s overall economy. This report studies the truck parking challenges and requirements and reviews similar truck studies in other states and presents findings from interviews with the Freight Advisory Committee, the Trucking Advisory Committee, and other trucking stakeholders on specific truck parking hot spots and general systemic challenges throughout the state. Public and private truck parking locations and capacity are analyzed with the development of a comprehensive Idaho truck parking database which is used to assesses truck parking demand using truck probe GPS data from the American Transportation Research Institute (ATRI). Finally, the needs for truck parking facilities based on current utilization, current and future unmet demand, and operational and policy needs are presented along with truck parking investment recommendations. AN - dot:90126 ET - Final Report: 12/01/2022 - 11/30/2023 KW - Truck facilities KW - Parking KW - Truck stops KW - Freight traffic KW - Roadside rest areas KW - Ramps KW - Policy KW - Research projects KW - Truck Parking Utilization KW - Truck Stops KW - Truck Rest Areas KW - Ramp Parking KW - POEs LA - English PB - Idaho Transportation Department PY - 2023-11-01 SN - FHWA-ID-23-300 TI - Idaho Truck Parking Research Project M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90126 ER -
Achieving Multi-Purpose Roadside Vegetation: Reducing Weed Invasion and Fire Risk while Enhancing Pollinator Habitat

Stewart, Erika ;

Grinath, Josh

2025-04-03 | PDF

Roadside vegetation management efforts often target a single desirable outcome; however, we often have multiple management goals for restoration. Theoretically, multiple goals can be achieved by establishing native vegetation, but the efficacy of methods used to establish native plant communities are largely unclear. The overall objective of this r ...

04/20/2026

Title : Achieving Multi-Purpose Roadside Vegetation: Reducing Weed Invasion and Fire Risk while Enhancing Pollinator Habitat Creator(s) : Stewart, Erika;Grinath, Josh; Corporate Creator(s) : Idaho State University Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration;Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program; Published Date : 2025-04-03 Report Number : FHWA-ID- 25-295 URL : https://rosap.ntl.bts.gov/view/dot/90125 Stewart, Erika and Grinath, Josh (2025). Achieving Multi-Purpose Roadside Vegetation: Reducing Weed Invasion and Fire Risk while Enhancing Pollinator Habitat. Stewart, Erika and Grinath, Josh "Achieving Multi-Purpose Roadside Vegetation: Reducing Weed Invasion and Fire Risk while Enhancing Pollinator Habitat" (2025) Stewart, Erika and Grinath, Josh "Achieving Multi-Purpose Roadside Vegetation: Reducing Weed Invasion and Fire Risk while Enhancing Pollinator Habitat" , 2025 Export RIS Citation Information. TY - Tech Report AU - Stewart, Erika AU - Grinath, Josh A2 - Idaho State University A3 - United States. Department of Transportation. Federal Highway Administration A3 - Idaho Transportation Department. Highways Construction and Operations, Contracting Services, Research Program AB - Roadside vegetation management efforts often target a single desirable outcome; however, we often have multiple management goals for restoration. Theoretically, multiple goals can be achieved by establishing native vegetation, but the efficacy of methods used to establish native plant communities are largely unclear. The overall objective of this research is to identify roadside restoration methods that simultaneously reduce weed invasion and fire risk, and enhance pollinator habitat. We hypothesized that combining plant management methods to establish native vegetation would meet these goals. To investigate our hypothesis, we implemented a nested experimental design comprising three experiments. The first experiment assessed restoration practices using mowing and seeding treatments. The second and third experiments assessed restoration practices using soil amendment treatments. We did not find treatment combinations that simultaneously met all of our restoration goals. However, in experiment 1, we found positive effects of seeding a forb-dominant seed mix on native plant establishment, including increasing native forb diversity, meeting the overall goal to increase pollinator habitat. Mowing had mixed results, benefiting both native forbs and introduced plants. In experiment 2, we found that additions of the microbial amendment in conjunction with the micronutrient fertilizer tended to positively affect native grass establishment, while simultaneously suppressing introduced forbs. In experiment 3, we found trends that the microbial amendment had positive effects on native plant establishment, and that the wool pellet fertilizer also reduced fire fuel loading. Overall, our results suggest that select vegetation management methods can be used, and for the greatest return on investment, we recommend that restoration practitioners apply forb-dominant seed mixes at the standard seeding rate, along with soil amendments. AN - dot:90125 ET - Final Report: 03/01/2021 – 05/31/2025 KW - Restoration ecology KW - Vegetation control KW - Native plants KW - Pollinators KW - Habitat KW - Roadside KW - Restoration KW - Vegetation Management KW - Invasion Resistance LA - English PB - Idaho Transportation Department PY - 2025-04-03 SN - FHWA-ID- 25-295 TI - Achieving Multi-Purpose Roadside Vegetation: Reducing Weed Invasion and Fire Risk while Enhancing Pollinator Habitat M3 - Tech Report N1 - United States N1 - T103357 UR - https://rosap.ntl.bts.gov/view/dot/90125 ER -
Evaluation of Runway Guard Light Configurations at North Las Vegas Airport

Patterson, James W.

2007-01-01 | PDF

Runway guard lights (RGL) both in pavement and elevated, when used in conjunction with Federal Aviation Administration-approved illuminated signs and painted hold position markings, have successfully reduced runway incursions at major air carrier airports. RGLs have not yet been recommended for use at general aviation (GA) airports. Typically, in p ...

04/20/2026

Title : Evaluation of Runway Guard Light Configurations at North Las Vegas Airport Creator(s) : Patterson, James W. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Air Traffic Organization Published Date : 2007-01-01 Report Number : DOT/FAA/AR-TN06/19 URL : https://rosap.ntl.bts.gov/view/dot/90124 Patterson, James W. (2007). Evaluation of Runway Guard Light Configurations at North Las Vegas Airport. Patterson, James W. "Evaluation of Runway Guard Light Configurations at North Las Vegas Airport" (2007) Patterson, James W. "Evaluation of Runway Guard Light Configurations at North Las Vegas Airport" , 2007 Export RIS Citation Information. TY - Tech Report AU - Patterson, James W. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Air Traffic Organization AB - Runway guard lights (RGL) both in pavement and elevated, when used in conjunction with Federal Aviation Administration-approved illuminated signs and painted hold position markings, have successfully reduced runway incursions at major air carrier airports. RGLs have not yet been recommended for use at general aviation (GA) airports. Typically, in pavement RGLs are installed in sets of eight parallel to the hold position marking. This research effort also evaluated the effectiveness of adding additional lights perpendicular to the hold position marking, creating a T-configuration. The purpose of this research effort was to determine if RGLs in the in-pavement, elevated, or T-configurations could offer the same safety enhancement to GA airports as they do for air carrier airports, even though GA airports are smaller in size, are far less complex in design, and have less separation between runways and taxiways. Eight test locations were selected for evaluation at the North Las Vegas Airport. Subject pilots were asked to navigate a vehicle on the airport surface to indicate the distances at which selected lights, signs, and markings became visible, and to clearly indicate the point at which the pilot must stop until clearance to enter or cross an active runway is received for air traffic control. The evaluations showed that the standard illuminated sign performed the best during daylight conditions, and the elevated RGLs were most effective during dusk, dawn and nighttime conditions. The proposed alert zone lighting configuration did not offer any significant enhancement, especially when approached from a 90-degree angle. Of the pilots polled, 60% ranked the elevated RGL as the most effective visual aid for identifying the taxiway hold position. AN - dot:90124 ET - Technical Notes KW - Airport runways KW - Aviation safety KW - Evaluation KW - General aviation airports KW - Lighting KW - Periods of the day KW - Runway incursions KW - Signs KW - Taxiways LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-01-01 SN - DOT/FAA/AR-TN06/19 TI - Evaluation of Runway Guard Light Configurations at North Las Vegas Airport M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90124 ER -
Verification and Calibration of Microscopic Traffic Simulation Using NDS and Video Data for Alternative Intersections and Freeway Merge and Diverge Areas

Zhou, Huaguo ;

Li, Tonghui

2026-03-01 | PDF

Traffic microsimulation enables practitioners to model the movement and interactions of individual vehicles, providing a level of detail not achievable with macroscopic or deterministic approaches. Microsimulation replicates vehicle-to-vehicle and driver-to-driver interactions under a wide range of traffic and geometric conditions. This makes it es ...

04/20/2026

Title : Verification and Calibration of Microscopic Traffic Simulation Using NDS and Video Data for Alternative Intersections and Freeway Merge and Diverge Areas Creator(s) : Zhou, Huaguo;Li, Tonghui;Quan, Li; Corporate Creator(s) : Auburn University. Highway Research Center Corporate Contributor(s) : Alabama. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-03-01 Report Number : ALDOT 931-092 URL : https://rosap.ntl.bts.gov/view/dot/90123 Zhou, Huaguo et al. (2026). Verification and Calibration of Microscopic Traffic Simulation Using NDS and Video Data for Alternative Intersections and Freeway Merge and Diverge Areas. Zhou, Huaguo and Li, Tonghui and Quan, Li "Verification and Calibration of Microscopic Traffic Simulation Using NDS and Video Data for Alternative Intersections and Freeway Merge and Diverge Areas" (2026) Zhou, Huaguo et al. "Verification and Calibration of Microscopic Traffic Simulation Using NDS and Video Data for Alternative Intersections and Freeway Merge and Diverge Areas" , 2026 Export RIS Citation Information. TY - Tech Report AU - Zhou, Huaguo AU - Li, Tonghui AU - Quan, Li A2 - Auburn University. Highway Research Center A3 - Alabama. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Traffic microsimulation enables practitioners to model the movement and interactions of individual vehicles, providing a level of detail not achievable with macroscopic or deterministic approaches. Microsimulation replicates vehicle-to-vehicle and driver-to-driver interactions under a wide range of traffic and geometric conditions. This makes it especially valuable for assessing alternative intersection designs, such as roundabouts, Diverging Diamond Interchanges (DDIs), and Restricted Crossing U-turns (RCUTs), as the Alabama Department of Transportation (ALDOT) is starting to incorporate more of these designs into future projects. These facilities offer operational and safety benefits, but they also introduce complex vehicle trajectories and behaviors that are not captured by default microsimulation parameters. This project develops calibration and validation guidelines tailored to Alabama’s alternative intersections and freeway merge/diverge areas. Drone video data were collected at 21 locations, including 18 roundabouts, 1 DDI, 1 RCUT, 1 freeway work zone (merging), and 1 freeway exit ramp (diverging). Vehicle trajectories and movement characteristics were extracted from drone videos using the video-based data extraction tool Data from sky and used to build PTV VISSIM networks. A calibration workflow was implemented using the VISSIM COM interface to automatically determine key parameters to define the priority rule at conflict points and car-following behavior. Model performance was assessed by comparing simulated outputs with field data such as travel time, speed distributions, and traffic volume. The resulting guidelines translated drone-observed driver behavior into recommended VISSIM calibration parameters for alternative intersections and freeway merge/diverge areas. AN - dot:90123 ET - Final Report KW - Roundabouts KW - Diverging traffic KW - Restricted crossing U turn intersections KW - Microsimulation KW - Drones KW - Trajectory control KW - Data collection KW - Freeway operations KW - Merging control KW - Vehicle to vehicle communications KW - Freeways KW - PTV VISSIM KW - Traffic Microsimulation KW - Drone-Based Trajectory Data KW - Freeway Merge and Diverge Areas LA - English PB - Alabama. Department of Transportation PY - 2026-03-01 SN - ALDOT 931-092 TI - Verification and Calibration of Microscopic Traffic Simulation Using NDS and Video Data for Alternative Intersections and Freeway Merge and Diverge Areas M3 - Tech Report N1 - United States N1 - FHWA/ALDOT 931-092 UR - https://rosap.ntl.bts.gov/view/dot/90123 ER -
A Preliminary Examination of the Effectiveness of Hand-Held Extinguishers Against Hidden Fires in the Cabin Overhead Area of Narrow-Body and Wide-Body Transport Aircraft

Marker, Timothy R.

2007-07-01 | PDF

Twenty hand-held extinguisher tests were performed in the overhead space in both narrow- and wide-body aircraft. These tests simulated a typical hidden fire in the inaccessible area above the cabin ceiling by using a number of small, controllable candle lanterns. The purpose of the tests was to determine the performance of the Federal Aviation Admi ...

04/20/2026

Title : A Preliminary Examination of the Effectiveness of Hand-Held Extinguishers Against Hidden Fires in the Cabin Overhead Area of Narrow-Body and Wide-Body Transport Aircraft Creator(s) : Marker, Timothy R. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development Published Date : 2007-07-01 Report Number : DOT/FAA/AR-TN04/33 URL : https://rosap.ntl.bts.gov/view/dot/90122 Marker, Timothy R. (2007). A Preliminary Examination of the Effectiveness of Hand-Held Extinguishers Against Hidden Fires in the Cabin Overhead Area of Narrow-Body and Wide-Body Transport Aircraft. Marker, Timothy R. "A Preliminary Examination of the Effectiveness of Hand-Held Extinguishers Against Hidden Fires in the Cabin Overhead Area of Narrow-Body and Wide-Body Transport Aircraft" (2007) Marker, Timothy R. "A Preliminary Examination of the Effectiveness of Hand-Held Extinguishers Against Hidden Fires in the Cabin Overhead Area of Narrow-Body and Wide-Body Transport Aircraft" , 2007 Export RIS Citation Information. TY - Tech Report AU - Marker, Timothy R. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research and Development AB - Twenty hand-held extinguisher tests were performed in the overhead space in both narrow- and wide-body aircraft. These tests simulated a typical hidden fire in the inaccessible area above the cabin ceiling by using a number of small, controllable candle lanterns. The purpose of the tests was to determine the performance of the Federal Aviation Administration-required, hand-held Halon 1211 extinguishers against a fire in this area when discharging the agent through a ceiling-mounted port. In an effort to maximize agent performance, the port design was modified as these tests progressed. The tests indicated that individual hand-held extinguishers did not predictably extinguish fires in the large-volume cabin overhead area typical of a wide-body aircraft, regardless of the port design. However, the use of ceiling-mounted discharge ports combined with hand-held extinguishers was more promising against fires in the more confined and smaller-volume overhead area typical of a narrow-body aircraft. Additional work would have to be performed to further develop and optimize this concept. AN - dot:90122 ET - Technical Notes KW - Aircraft cabins KW - Flammability KW - Fire extinguishers KW - Fire fighting equipment KW - Tests KW - Cabin overhead area KW - Halon LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2007-07-01 SN - DOT/FAA/AR-TN04/33 TI - A Preliminary Examination of the Effectiveness of Hand-Held Extinguishers Against Hidden Fires in the Cabin Overhead Area of Narrow-Body and Wide-Body Transport Aircraft M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90122 ER -
An Investigation on Transversely Prestressed Concrete Bridge Decks [Technical Summary]

Ramirez, Julio A.

2002-12-01 | PDF

The objective of this research project was to develop general design guidelines for the application of deck edge transverse post-tensioning required to meet desirable levels of compression stresses on the top surface of concrete bridge decks. The desired level of compression induced by the transverse post-tensioning must be enough to limit the leve ...

04/20/2026

Title : An Investigation on Transversely Prestressed Concrete Bridge Decks [Technical Summary] Creator(s) : Ramirez, Julio A. 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 : 2002-12-01 Report Number : FHWA/IN/JTRP-2002/26 URL : https://rosap.ntl.bts.gov/view/dot/90121 Ramirez, Julio A. (2002). An Investigation on Transversely Prestressed Concrete Bridge Decks [Technical Summary]. Ramirez, Julio A. "An Investigation on Transversely Prestressed Concrete Bridge Decks [Technical Summary]" (2002) Ramirez, Julio A. "An Investigation on Transversely Prestressed Concrete Bridge Decks [Technical Summary]" , 2002 Export RIS Citation Information. TY - Tech Report AU - Ramirez, Julio A. A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The objective of this research project was to develop general design guidelines for the application of deck edge transverse post-tensioning required to meet desirable levels of compression stresses on the top surface of concrete bridge decks. The desired level of compression induced by the transverse post-tensioning must be enough to limit the level of tensile stresses at service on the top surface of the deck. Transverse stresses induced by live and dead load are superimposed to the stresses induced by the applied post-tensioning under the assumption of linear elastic behavior. The actual calculation of the transverse stresses induced by live and dead load is beyond the scope of this study. AN - dot:90121 ET - Technical Summary KW - Bridge decks KW - Posttensioning KW - Durability KW - Design KW - Recommendations KW - Prestressed concrete KW - Bridge superstructures KW - Guidelines KW - Transverse strength LA - English PB - Indiana Department of Transportation PY - 2002-12-01 SN - FHWA/IN/JTRP-2002/26 TI - An Investigation on Transversely Prestressed Concrete Bridge Decks [Technical Summary] M3 - Tech Report N1 - United States N1 - SPR-2409 UR - https://rosap.ntl.bts.gov/view/dot/90121 ER -
Full-Scale Tests on Rubblized Pavement Test Items at the National Airport Pavement Test Facility

Garg, Navneet

2010-05-01 | PDF

Rubblization is defined as the process of fracturing existing concrete pavement in-place into smaller interconnected pieces. Rubblization breaks the slab action and minimizes or prevents the occurrence of reflective cracks in the asphalt concrete overlay. This is the first study conducted on the full-scale accelerated pavement testing of rubblized ...

04/20/2026

Title : Full-Scale Tests on Rubblized Pavement Test Items at the National Airport Pavement Test Facility Creator(s) : Garg, Navneet Corporate Creator(s) : SRA International, Inc Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Airport Safety and Operations Division Published Date : 2010-05-01 Report Number : DOT/FAA/AR-TN10/9 URL : https://rosap.ntl.bts.gov/view/dot/90120 Garg, Navneet (2010). Full-Scale Tests on Rubblized Pavement Test Items at the National Airport Pavement Test Facility. Garg, Navneet "Full-Scale Tests on Rubblized Pavement Test Items at the National Airport Pavement Test Facility" (2010) Garg, Navneet "Full-Scale Tests on Rubblized Pavement Test Items at the National Airport Pavement Test Facility" , 2010 Export RIS Citation Information. TY - Tech Report AU - Garg, Navneet A2 - SRA International, Inc A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Airport Safety and Operations Division A4 - Agrawal, Satish AB - Rubblization is defined as the process of fracturing existing concrete pavement in-place into smaller interconnected pieces. Rubblization breaks the slab action and minimizes or prevents the occurrence of reflective cracks in the asphalt concrete overlay. This is the first study conducted on the full-scale accelerated pavement testing of rubblized concrete pavements with hot-mix asphalt overlay under heavy aircraft loading. AN - dot:90120 ET - Technical Notes KW - Airport runways KW - Asphalt rubber KW - Comminution KW - Concrete pavements KW - Pavement cracking KW - Reflection cracking KW - Wheel loads LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2010-05-01 SN - DOT/FAA/AR-TN10/9 TI - Full-Scale Tests on Rubblized Pavement Test Items at the National Airport Pavement Test Facility M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90120 ER -
An Investigation on Transversely Prestressed Concrete Bridge Decks

Smith-Pardo, J. Paul ;

Ramirez, Julio A.

2002-12-01 | PDF

This study is concerned with the development of design specifications for the use of transverse post-tensioning in concrete bridge decks. The ultimate goal behind this proposal is to improve the durability of concrete bridge superstructures. Experimental results from previous studies are used to validate the analytical models implemented in the dev ...

04/20/2026

Title : An Investigation on Transversely Prestressed Concrete Bridge Decks Creator(s) : Smith-Pardo, J. Paul;Ramirez, Julio A.; 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 : 2002-12-01 Report Number : FHWA/IN/JTRP-2002/26 URL : https://rosap.ntl.bts.gov/view/dot/90119 Smith-Pardo, J. Paul and Ramirez, Julio A. (2002). An Investigation on Transversely Prestressed Concrete Bridge Decks. Smith-Pardo, J. Paul and Ramirez, Julio A. "An Investigation on Transversely Prestressed Concrete Bridge Decks" (2002) Smith-Pardo, J. Paul and Ramirez, Julio A. "An Investigation on Transversely Prestressed Concrete Bridge Decks" , 2002 Export RIS Citation Information. TY - Tech Report AU - Smith-Pardo, J. Paul AU - Ramirez, Julio A. A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This study is concerned with the development of design specifications for the use of transverse post-tensioning in concrete bridge decks. The ultimate goal behind this proposal is to improve the durability of concrete bridge superstructures. Experimental results from previous studies are used to validate the analytical models implemented in the development of the design specifications. It is found that the required distribution of transverse post-tensioning is such that different application levels of prestressing are required in regions containing the interior and exterior (or outermost) diaphragms. It is also concluded that the magnitude of such transverse forces is a function of the girder boundary conditions, the axial stiffness of the diaphragms, the skew angle of the deck, and the position of the diaphragms/stiffener with respect to the edge of the deck. Simplified design guidelines are developed for use in INDOT. Examples are included to illustrate the suggested methodology and to analytically validate its performance. AN - dot:90119 ET - Final Report KW - Bridge decks KW - Posttensioning KW - Durability KW - Design KW - Recommendations KW - Prestressed concrete KW - Bridge superstructures KW - design recommendations KW - design examples LA - English PB - Indiana Department of Transportation PY - 2002-12-01 SN - FHWA/IN/JTRP-2002/26 TI - An Investigation on Transversely Prestressed Concrete Bridge Decks M3 - Tech Report N1 - United States N1 - SPR-2409 UR - https://rosap.ntl.bts.gov/view/dot/90119 ER -
Airborne Evaluation of Retro-Reflective Beads

Previti, Anthony J. ;

Cyrus, Holly M.

2010-04-01 | PDF

This project was undertaken by the Federal Aviation Administration (FAA) Airport Safety Technology Research and Development Sub-Team as part of an effort to determine the relative conspicuity, from an aircraft on approach, of Type I and Type III retro-reflective beads. Retro-reflective beads are designed to redirect and return light back to its sou ...

04/20/2026

Title : Airborne Evaluation of Retro-Reflective Beads Creator(s) : Previti, Anthony J.;Cyrus, Holly M.;Gallagher, Donald W.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport Pavement Research and Development Section;Hi-Tec Systems; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Airport Safety and Standards Published Date : 2010-04-01 URL : https://rosap.ntl.bts.gov/view/dot/90118 Previti, Anthony J. et al. (2010). Airborne Evaluation of Retro-Reflective Beads. Previti, Anthony J. and Cyrus, Holly M. and Gallagher, Donald W. "Airborne Evaluation of Retro-Reflective Beads" (2010) Previti, Anthony J. et al. "Airborne Evaluation of Retro-Reflective Beads" , 2010 Export RIS Citation Information. TY - Tech Report AU - Previti, Anthony J. AU - Cyrus, Holly M. AU - Gallagher, Donald W. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport Pavement Research and Development Section A2 - Hi-Tec Systems A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Airport Safety and Standards AB - This project was undertaken by the Federal Aviation Administration (FAA) Airport Safety Technology Research and Development Sub-Team as part of an effort to determine the relative conspicuity, from an aircraft on approach, of Type I and Type III retro-reflective beads. Retro-reflective beads are designed to redirect and return light back to its source. The inclusion of retro-reflective beads in painted surface markings can increase their conspicuity. It has been suggested that Type III retro-reflective beads, which have a higher index of refraction (IOR) compared to Type I beads, will substantially increase the conspicuity of paint markings and could help prevent runway incursions. The FAA uses Federal Specification TT-B-1325D, “Beads (Glass Spheres) Retro-Reflective,” to specify retro-reflective beads. AN - dot:90118 ET - Technical Notes KW - Airport runways KW - Approach KW - Evaluation KW - Glass beads KW - Retroreflectivity LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2010-04-01 TI - Airborne Evaluation of Retro-Reflective Beads M3 - Tech Report N1 - United States N1 - DOT/FAA/AR-TN10/8 UR - https://rosap.ntl.bts.gov/view/dot/90118 ER -
Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges

Quiel, Spencer

;

Ma, Saidong

2026-03-27 | PDF

This report is the second part of a two-phase study to assemble performance-based design guidance for the evaluation and mitigation of severe fire hazards for highway bridges. The following are addressed: (1) summarize design-basis tools that can be used for “engineering analysis” per NFPA 502 Chapter 6 to calculate the thermo-mechanical impact of ...

04/20/2026

Title : Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges Creator(s) : Quiel, Spencer;Ma, Saidong;Zhu, Zheda;Murphy, Thomas;Lopez, Maria;Artmont, Frank A.; Corporate Creator(s) : Lehigh University;Modjeski and Masters, Inc; Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2026-03-27 Report Number : ATLSS 26-03 URL : https://rosap.ntl.bts.gov/view/dot/90117 Quiel, Spencer et al. (2026). Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges. Quiel, Spencer et al. "Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges" (2026) Quiel, Spencer et al. "Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges" , 2026 Export RIS Citation Information. TY - Tech Report AU - Quiel, Spencer AU - Ma, Saidong AU - Zhu, Zheda AU - Murphy, Thomas AU - Lopez, Maria AU - Artmont, Frank A. A2 - Lehigh University A2 - Modjeski and Masters, Inc A3 - United States. Department of Transportation. Federal Highway Administration AB - This report is the second part of a two-phase study to assemble performance-based design guidance for the evaluation and mitigation of severe fire hazards for highway bridges. The following are addressed: (1) summarize design-basis tools that can be used for “engineering analysis” per NFPA 502 Chapter 6 to calculate the thermo-mechanical impact of design-basis fires on a particular bridge; (2) summarize approaches for evaluating common thermo-mechanical limit states of steel and prestressed girders as well as other common structural elements in bridge structures under fire; and (3) review fire mitigation strategies and recommend needs for future research. Thermal and structural finite element (FE) analysis is demonstrated as an effective tool for evaluating both steel and concrete bridge elements under fire exposure. Simpler lumped mass methods of thermal analysis are appropriate for steel materials, which have relatively high thermal conductivity and can therefore be approximated as having a relatively uniform temperature increase over their cross-section, which has a large ratio of exposed area to thermal mass. For other materials with lower thermal conductivity like concrete, a significant internal thermal gradient will develop under fire exposure, thus making lumped mass methods ineffective. More research is needed to develop simplified calculation tools to evaluate concrete bridge elements under fire. AN - dot:90117 ET - Final Report KW - Highway bridges KW - Performance based specifications KW - Structural materials KW - Fire prevention KW - Analysis KW - Evaluation KW - Finite element method KW - Thermal conductivity KW - Concrete bridges KW - performance-based structural-fire assessment KW - passive fire protection LA - English PB - Lehigh University PY - 2026-03-27 SN - ATLSS 26-03 TI - Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges M3 - Tech Report N1 - United States N1 - 693JJ321C000035 Phase II UR - https://rosap.ntl.bts.gov/view/dot/90117 ER -
Limit States Design of Deep Foundation [Technical Summary]

Salgado, Rodrigo

2004-12-01 | PDF

The primary objective of this study is to propose a LRFD method for shallow and deep foundations that is based on a rational, probability-based investigation of design methods. Since resistance factor values are dependent upon the values of load factors used, a method to adjust the resistance factors to account for code-specified load factors is pr ...

04/20/2026

Title : Limit States Design of Deep Foundation [Technical Summary] Creator(s) : Salgado, Rodrigo 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 : 2004-12-01 Report Number : FHWA/IN/JTRP-2004/21 URL : https://rosap.ntl.bts.gov/view/dot/90116 Salgado, Rodrigo (2004). Limit States Design of Deep Foundation [Technical Summary]. Salgado, Rodrigo "Limit States Design of Deep Foundation [Technical Summary]" (2004) Salgado, Rodrigo "Limit States Design of Deep Foundation [Technical Summary]" , 2004 Export RIS Citation Information. TY - Brief AU - Salgado, Rodrigo A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The primary objective of this study is to propose a LRFD method for shallow and deep foundations that is based on a rational, probability-based investigation of design methods. Since resistance factor values are dependent upon the values of load factors used, a method to adjust the resistance factors to account for code-specified load factors is presented. Resistance factors for ultimate bearing capacity are then computed using reliability analysis for shallow and deep foundations both in sand and in clay, for use with both ASCE-7 (1996) and AASHTO (1998) load factors. The various considered methods obtain their input parameters from the CPT, the SPT, or laboratory testing. Finally, designers may wish to use design methods that are not considered in this study. As such, the designer needs the capability to select resistance factors that reflect the uncertainty of the design method chosen. A methodology is proposed in this study to accomplish this task, in a way that is consistent with the framework. AN - dot:90116 ET - Technical Summary KW - Load and resistance factor design KW - Geotechnical engineering KW - Field tests KW - Reliability KW - Probability KW - Load factor KW - Foundation Design KW - Reliability-Based Design (RBD) LA - English PB - Indiana Department of Transportation PY - 2004-12-01 SN - FHWA/IN/JTRP-2004/21 TI - Limit States Design of Deep Foundation [Technical Summary] M3 - Brief N1 - United States N1 - SPR-2406 UR - https://rosap.ntl.bts.gov/view/dot/90116 ER -
Limits States Design of Deep Foundations

Foye, Kevin ;

Jaoude, Grace Abou

2004-12-01 | PDF

Load and Resistance Factor Design (LRFD) shows promise as a viable alternative to the present working stress design (WSD) approach to foundation design. The key improvements of LRFD over the traditional Working Stress Design (WSD) are the ability to provide a more consistent level of reliability and the possibility of accounting for load and resist ...

04/20/2026

Title : Limits States Design of Deep Foundations Creator(s) : Foye, Kevin;Jaoude, Grace Abou;Salgado, Rodrigo; 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 : 2004-12-01 Report Number : FHWA/IN/JTRP-2004/21 URL : https://rosap.ntl.bts.gov/view/dot/90115 Foye, Kevin et al. (2004). Limits States Design of Deep Foundations. Foye, Kevin and Jaoude, Grace Abou and Salgado, Rodrigo "Limits States Design of Deep Foundations" (2004) Foye, Kevin et al. "Limits States Design of Deep Foundations" , 2004 Export RIS Citation Information. TY - Tech Report AU - Foye, Kevin AU - Jaoude, Grace Abou AU - Salgado, Rodrigo A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Load and Resistance Factor Design (LRFD) shows promise as a viable alternative to the present working stress design (WSD) approach to foundation design. The key improvements of LRFD over the traditional Working Stress Design (WSD) are the ability to provide a more consistent level of reliability and the possibility of accounting for load and resistance uncertainties separately. In order for foundation design to be consistent with current structural design practice, the use of the same loads, load factors and load combinations would be required. In this study, we review the load factors presented in various LRFD Codes from the US, Canada and Europe. A simple first-order second moment (FOSM) reliability analysis is presented to determine appropriate ranges for the values of the load factors. These values are compared with those proposed in the Codes. The comparisons between the analysis and the Codes show that the values of load factors given in the Codes generally fall within ranges consistent with the results of the FOSM analysis. For LRFD to gain acceptance in geotechnical engineering, a framework for the objective assessment of resistance factors is needed. Such a framework, based on reliability analysis is proposed in this study. Probability Density Functions (PDFs), representing design variable uncertainties, are required for analysis. A systematic approach to the selection of PDFs is presented. Such a procedure is a critical prerequisite to a rational probabilistic analysis in the development of LRFD methods in geotechnical engineering. Additionally, in order for LRFD to fulfill its promise for designs with more consistent reliability, the methods used to execute a design must be consistent with the methods assumed in the development of the LRFD factors. In this study, a methodology for the estimation of soil parameters for use in design equations is proposed that should allow for more statistical consistency in design inputs than is possible in traditional methods. Resistance factor values are dependent upon the values of load factors used. Thus, a method to adjust the resistance factors to account for code-specified load factors is also presented. Resistance factors for ultimate bearing capacity are computed using reliability analysis for shallow and deep foundations both in sand and in clay, for use with both ASCE-7 (1996) and AASHTO (1998) load factors. The various considered methods obtain their input parameters from the CPT, the SPT, or laboratory testing. Designers may wish to use design methods that are not considered in this study. As such, the designer needs the capability to select resistance factors that reflect the uncertainty of the design method chosen. A methodology is proposed in this study to accomplish this task, in a way that is consistent with the framework. AN - dot:90115 ET - Final Report KW - Load and resistance factor design KW - Geotechnical engineering KW - Field tests KW - Reliability KW - Probability KW - Load factor KW - Foundation Design KW - Reliability-Based Design (RBD) LA - English PB - Indiana Department of Transportation PY - 2004-12-01 SN - FHWA/IN/JTRP-2004/21 TI - Limits States Design of Deep Foundations M3 - Tech Report N1 - United States N1 - SPR-2406 UR - https://rosap.ntl.bts.gov/view/dot/90115 ER -
Investigation of Bridge Deck Cracking in Various Bridge Superstructure Systems [Technical Summary]

Frosch, Robert J.

2003-02-01 | PDF

This research project was divided into five phases to determine the factors affecting transverse and longitudinal bridge deck cracking, as well as, to develop design recommendations that minimize or prevent these types of bridge deck cracking. The research focused on the design and construction of new bridge decks. For bridge decks being rehabilita ...

04/20/2026

Title : Investigation of Bridge Deck Cracking in Various Bridge Superstructure Systems [Technical Summary] Creator(s) : Frosch, Robert J. 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 : 2003-02-01 Report Number : FHWA/IN/JTRP-2002/25 URL : https://rosap.ntl.bts.gov/view/dot/90114 Frosch, Robert J. (2003). Investigation of Bridge Deck Cracking in Various Bridge Superstructure Systems [Technical Summary]. Frosch, Robert J. "Investigation of Bridge Deck Cracking in Various Bridge Superstructure Systems [Technical Summary]" (2003) Frosch, Robert J. "Investigation of Bridge Deck Cracking in Various Bridge Superstructure Systems [Technical Summary]" , 2003 Export RIS Citation Information. TY - Brief AU - Frosch, Robert J. A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - This research project was divided into five phases to determine the factors affecting transverse and longitudinal bridge deck cracking, as well as, to develop design recommendations that minimize or prevent these types of bridge deck cracking. The research focused on the design and construction of new bridge decks. For bridge decks being rehabilitated with overlays, overlay cracking can also be of concern. Therefore, for completeness, an overview of this type of cracking is also provided. AN - dot:90114 ET - Technical Summary KW - Bridge decks KW - Transverse cracking KW - Longitudinal cracking KW - Pavement overlays KW - Bridge superstructures KW - Concrete structures KW - Transverse reinforcement KW - restrained shrinkage KW - shrinkage and temperature reinforcement LA - English PB - Indiana Department of Transportation PY - 2003-02-01 SN - FHWA/IN/JTRP-2002/25 TI - Investigation of Bridge Deck Cracking in Various Bridge Superstructure Systems [Technical Summary] M3 - Brief N1 - United States N1 - SPR-2404 UR - https://rosap.ntl.bts.gov/view/dot/90114 ER -
Oxygen Enhanced Fires in LD-3 Cargo Containers

Marker, Timothy R. ;

Diaz, Ricardo

1999-05-01 | PDF

Four tests were conducted inside a 169-cubic-foot LD-3 cargo container to demonstrate the hazards associated with the release of gaseous oxygen during suppression of a smoldering fire with Halon 1301. The cargo fires were allowed to burn for a short duration before Halon 1301 was discharged into the container. After the suppressant concentration st ...

04/20/2026

Title : Oxygen Enhanced Fires in LD-3 Cargo Containers Creator(s) : Marker, Timothy R.;Diaz, Ricardo; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 1999-05-01 Report Number : DOT/FAA/AR-TN98/29 URL : https://rosap.ntl.bts.gov/view/dot/90113 Marker, Timothy R. and Diaz, Ricardo (1999). Oxygen Enhanced Fires in LD-3 Cargo Containers. Marker, Timothy R. and Diaz, Ricardo "Oxygen Enhanced Fires in LD-3 Cargo Containers" (1999) Marker, Timothy R. and Diaz, Ricardo "Oxygen Enhanced Fires in LD-3 Cargo Containers" , 1999 Export RIS Citation Information. TY - Tech Report AU - Marker, Timothy R. AU - Diaz, Ricardo A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Fire Safety Section A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - Four tests were conducted inside a 169-cubic-foot LD-3 cargo container to demonstrate the hazards associated with the release of gaseous oxygen during suppression of a smoldering fire with Halon 1301. The cargo fires were allowed to burn for a short duration before Halon 1301 was discharged into the container. After the suppressant concentration stabilized to about 3%, the minimum design concentration for inerting, a quantity of oxygen was discharged to simulate the relief of oxygen from an over-pressurized cylinder. ring the first three tests, 11 cubic feet of oxygen was bled into the container from a remote cylinder. A fourth test was conducted in which 22 cubic feet of oxygen was introduced which produced a severe fire that destroyed the container. Temperature, toxic gases, and halon concentration were measured continuously inside the container and video cameras recorded the tests from three locations external to the container. AN - dot:90113 ET - Technical Notes KW - Aviation safety KW - Cargo aircraft KW - Container handling KW - Fire extinguishers KW - Oxygen content KW - Toxicity LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1999-05-01 SN - DOT/FAA/AR-TN98/29 TI - Oxygen Enhanced Fires in LD-3 Cargo Containers M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90113 ER -
Project Development and Utility Coordination as a Partnership [Tech Transfer Summary]

Sturgill, Roy

2025-12-01 | PDF

The primary purpose of this research was to develop and propose procedures for incorporating partnerships with utility stakeholders into the early stages of the project development process at the Iowa Department of Transportation (Iowa DOT), with the broader goal of streamlining workflows to reduce utility-related delays and cost overruns.

04/20/2026

Title : Project Development and Utility Coordination as a Partnership [Tech Transfer Summary] Creator(s) : Sturgill, Roy Corporate Creator(s) : Iowa State University. Institute for Transportation Corporate Contributor(s) : Iowa. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-12-01 Report Number : 21-776) URL : https://rosap.ntl.bts.gov/view/dot/90112 Sturgill, Roy (2025). Project Development and Utility Coordination as a Partnership [Tech Transfer Summary]. Sturgill, Roy "Project Development and Utility Coordination as a Partnership [Tech Transfer Summary]" (2025) Sturgill, Roy "Project Development and Utility Coordination as a Partnership [Tech Transfer Summary]" , 2025 Export RIS Citation Information. TY - Brief AU - Sturgill, Roy A2 - Iowa State University. Institute for Transportation A3 - Iowa. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The primary purpose of this research was to develop and propose procedures for incorporating partnerships with utility stakeholders into the early stages of the project development process at the Iowa Department of Transportation (Iowa DOT), with the broader goal of streamlining workflows to reduce utility-related delays and cost overruns. AN - dot:90112 ET - Tech Transfer Summary KW - Partnerships KW - Project management KW - Coordination KW - Best practices KW - Transportation departments KW - Recommendations KW - Data collection KW - Policy LA - English PB - Iowa Department of Transportation PY - 2025-12-01 SN - 21-776) TI - Project Development and Utility Coordination as a Partnership [Tech Transfer Summary] M3 - Brief N1 - United States N1 - SPR-RE22(012)-8H-00 UR - https://rosap.ntl.bts.gov/view/dot/90112 ER -
Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 27, Data Complete Through 4/3/2026

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

2026-04-08 | Special Issue - Weekly Motor Fuel Report | PDF

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

04/20/2026

Title : Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 27, Data Complete Through 4/3/2026 Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Published Date : 2026-04-08 Series : Special Issue - Weekly Motor Fuel Report URL : https://rosap.ntl.bts.gov/view/dot/90111 United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2026). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 27, Data Complete Through 4/3/2026. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 27, Data Complete Through 4/3/2026" (2026) United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 27, Data Complete Through 4/3/2026" , 2026 Export RIS Citation Information. TY - Statistical Report A2 - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information AB - The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration (EIA) website. The EIA publishes the average daily amount of gasoline supplied in barrels, which HPPI converts to an average number of gallons of gasoline per week. AN - dot:90111 KW - Fuel consumption KW - Gasoline KW - Supply KW - Traffic volume KW - Data collection KW - Data analysis LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information PY - 2026-04-08 T2 - Special Issue - Weekly Motor Fuel Report TI - Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 27, Data Complete Through 4/3/2026 M3 - Statistical Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90111 ER -
Traffic Volume Trends: February 2026

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

2026-04-08 | Traffic Volume Trends | PDF

Traffic Volume Trends is a monthly report based on hourly traffic count data reported by the States. These data are collected at approximately 5,000 continuous traffic counting locations nationwide and are used to estimate the percent change in traffic for the current month compared with the same month in the previous year. Estimates are re-adjuste ...

04/20/2026

Title : Traffic Volume Trends: February 2026 Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Published Date : 2026-04-08 Series : Traffic Volume Trends URL : https://rosap.ntl.bts.gov/view/dot/90110 United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2026). Traffic Volume Trends: February 2026. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Traffic Volume Trends: February 2026" (2026) United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information "Traffic Volume Trends: February 2026" , 2026 Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information AB - Traffic Volume Trends is a monthly report based on hourly traffic count data reported by the States. These data are collected at approximately 5,000 continuous traffic counting locations nationwide and are used to estimate the percent change in traffic for the current month compared with the same month in the previous year. Estimates are re-adjusted annually to match the vehicle miles of travel from the Highway Performance Monitoring System and are continually updated with additional data. AN - dot:90110 KW - Traffic volume KW - Statistical trends KW - Traffic counts KW - Traffic surveillance KW - Data collection LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information PY - 2026-04-08 T2 - Traffic Volume Trends TI - Traffic Volume Trends: February 2026 M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90110 ER -
Impacts of Wildfires on Highway Assets [TechBrief]

Ram, Prashant ;

Lopez, Sarah

2026-04-01 | PDF

Over the past several decades, the United States has seen a steady increase in the intensity and extent of wildfires, especially in the Western States. Figure 1 presents data on the number of wildfires and total acres burned in the United States between 1981 and 2021 (National Interagency Fire Center (NIFC) n.d.). While the number of wildfires show ...

04/20/2026

Title : Impacts of Wildfires on Highway Assets [TechBrief] Creator(s) : Ram, Prashant;Lopez, Sarah;Stempihar, Jeff;Smith, Kurt; Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Contributor(s) : Golalipour, Amir Published Date : 2026-04-01 Report Number : FHWA-HRT-26-005 URL : https://rosap.ntl.bts.gov/view/dot/90109 Ram, Prashant et al. (2026). Impacts of Wildfires on Highway Assets [TechBrief]. Ram, Prashant et al. "Impacts of Wildfires on Highway Assets [TechBrief]" (2026) Ram, Prashant et al. "Impacts of Wildfires on Highway Assets [TechBrief]" , 2026 Export RIS Citation Information. TY - Brief AU - Ram, Prashant AU - Lopez, Sarah AU - Stempihar, Jeff AU - Smith, Kurt A2 - United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Golalipour, Amir A4 - Golalipour, Amir AB - Over the past several decades, the United States has seen a steady increase in the intensity and extent of wildfires, especially in the Western States. Figure 1 presents data on the number of wildfires and total acres burned in the United States between 1981 and 2021 (National Interagency Fire Center (NIFC) n.d.). While the number of wildfires shows a relatively constant trend, the total acres burned over a 3-yr period shows a steady increase. According to recent data, the largest and most destructive wildfires have mostly occurred since 2000 (Legislative Analyst’s Office 2020). Wildfires cost agencies and the public billions of dollars in economic loss due to property damage, environmental damage, fire suppression efforts, cleanup efforts, and litigation (Congressional Budget Office (CBO) 2022). Specific to transportation infrastructure, wildfires have destroyed or caused extensive damage to roads, bridges, and drainage structures. In several cases, State and local agencies have been forced to close roads and highways, sometimes for extended periods. Detours from these closures can be lengthy, and existing pavements on the detour routes may not be adequately designed or in adequate condition to handle the volume and weight of additional loadings. A secondary hazard is postfire flooding. Wildfires leave areas vulnerable to decreased vegetation, decreased soil infiltration capacity and stability, and the potential for hydrophobic layers— all of which increase flooding potential. It is not uncommon for the aftereffects of wildfires to result in 1,000-yr floods within the first 1 to 2 yr after a wildfire when combined with high-intensity rain (Fraser, Chester, and Underwood 2020). Federal, State, and local agencies alike are increasingly recognizing the effect of wildfires on pavement and roadway infrastructure. Much has been learned in the past several years regarding the impacts of wildfire events on infrastructure assets as well as the planning, management, and recovery needs for those assets. The purposes of this TechBrief are to accomplish the following: Document the current state of knowledge on the direct and indirect impacts of wildfires on pavement systems based on a comprehensive literature review. Summarize lessons learned from interviews conducted with local, State, and Federal agencies on their experiences in dealing with the impacts of wildfires. Identify knowledge gaps and research needs. AN - dot:90109 KW - Wildfires KW - Pavements KW - Disaster preparedness KW - Disaster resilience LA - English PB - United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology PY - 2026-04-01 SN - FHWA-HRT-26-005 TI - Impacts of Wildfires on Highway Assets [TechBrief] M3 - Brief N1 - United States N1 - 693JJ319D000023 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90109 ER -
Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges [Research Brief]

Tehrani, Fariborz M.

2026-03-01 | PDF

The primary goal of this research is to establish accurate stress–strain relationships for LWC and ICC and to evaluate their mechanical and transport properties under realistic conditions. The study measures potential improvements in durability and service life, assesses lifecycle cost and environmental impact, and identifies design limitations in ...

04/20/2026

Title : Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges [Research Brief] Creator(s) : Tehrani, Fariborz M. Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;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 : 2026-03-01 Report Number : 2531 URL : https://rosap.ntl.bts.gov/view/dot/90108 Tehrani, Fariborz M. (2026). Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges [Research Brief]. Tehrani, Fariborz M. "Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges [Research Brief]" (2026) Tehrani, Fariborz M. "Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges [Research Brief]" , 2026 Export RIS Citation Information. TY - Brief AU - Tehrani, Fariborz M. A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration 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 primary goal of this research is to establish accurate stress–strain relationships for LWC and ICC and to evaluate their mechanical and transport properties under realistic conditions. The study measures potential improvements in durability and service life, assesses lifecycle cost and environmental impact, and identifies design limitations in current specifications. By providing empirical data and analytical models, the research supports the development of updated design guidelines and promotes the adoption of LWC and ICC in highway and bridge construction to support critical U.S. transportation infrastructure. AN - dot:90108 ET - Research Brief KW - Concrete KW - Properties of materials KW - Strength of materials KW - Durability KW - Sustainable development KW - Emissions testing KW - Costs KW - Lightweight concrete KW - Life cycle analysis KW - Highway bridges KW - Infrastructure KW - Laboratory tests KW - Mechanical properties KW - Data analysis LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 2531 TI - Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges [Research Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90108 ER -
Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges

Tehrani, Fariborz M.

2026-03-01 | PDF

Concrete is the primary construction material of bridges, roads, and other transportation infrastructure across the United States, but conventional normal-weight concrete (NWC) is heavy, prone to cracking, and expensive to maintain over time. This study examines the mechanical properties, durability, and lifecycle performance of lightweight aggrega ...

04/20/2026

Title : Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges Creator(s) : Tehrani, Fariborz M. Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;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 : 2026-03-01 Report Number : 26-06 DOI : https://doi.org/10.31979/mti.2024.2218 Tehrani, Fariborz M. (2026). Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges. https://doi.org/10.31979/mti.2024.2218 Tehrani, Fariborz M. "Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges" (2026), https://doi.org/10.31979/mti.2024.2218 Tehrani, Fariborz M. "Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges" , 2026, https://doi.org/10.31979/mti.2024.2218 Export RIS Citation Information. TY - Tech Report AU - Tehrani, Fariborz M. A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration 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 - Concrete is the primary construction material of bridges, roads, and other transportation infrastructure across the United States, but conventional normal-weight concrete (NWC) is heavy, prone to cracking, and expensive to maintain over time. This study examines the mechanical properties, durability, and lifecycle performance of lightweight aggregate concrete (LWC) and internally cured concrete (ICC) as alternatives in transportation infrastructure applications. Through laboratory testing, computer modeling, and lifecycle analysis, the research evaluates how these materials perform in terms of strength, flexibility, durability, cost, and environmental impact. The results show that LWC and ICC can meet required strength levels while being lighter and more flexible, which helps reduce cracking and long-term damage. These materials also improve internal moisture conditions, slowing deterioration caused by shrinkage and exposure to harsh environments such as deicing salts. The study finds that lightweight concrete can last nearly five times longer than conventional concrete in some applications, while significantly lowering maintenance needs. Over a structure’s full lifespan, this can mean up to 85% lower lifecycle costs and up to 76% fewer greenhouse gas emissions. Current design codes often underestimate LWC performance, however, and therefore, revised empirical models are recommended. Overall, results confirm that LWC and ICC provide a structurally efficient, economically viable, and environmentally responsible solution for modern transportation infrastructure. AN - dot:90107 DO - https://doi.org/10.31979/mti.2024.2218 KW - Concrete KW - Properties of materials KW - Strength of materials KW - Durability KW - Sustainable development KW - Emissions testing KW - Costs KW - Lightweight concrete KW - Life cycle analysis KW - Highway bridges KW - Infrastructure KW - Laboratory tests KW - Mechanical properties KW - Data analysis LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 26-06 TI - Exploring the Stress-Strain Relationship of Lightweight Concrete to Enhance the Lifecycle Performance of Transportation Highways and Bridges M3 - Tech Report N1 - United States N1 - SB1-SJAUX_2023-26 UR - https://rosap.ntl.bts.gov/view/dot/90107 ER -

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