United States. Department of Transportation. Federal Highway Administration. Office of Safety
2024-02-05
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Serious injuries and fatalities among pedestrians and bicyclists have increased in recent years. According to the most recent National Highway Traffic Safety Administration report, 7,388 pedestrians and 966 bicyclists were killed in traffic crashes in 2021. Pedestrians and bicyclists are just two types of vulnerable road users (VRUs) — people who a
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United States. Department of Transportation. Federal Highway Administration. Office of Safety (2024). The Highway Safety Improvement Program (HSIP) 2022: Using HSIP to Improve Vulnerable Road User Safety (Report No. FHWA-SA-23-020). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/89876
United States. Department of Transportation. Federal Highway Administration. Office of Safety. The Highway Safety Improvement Program (HSIP) 2022: Using HSIP to Improve Vulnerable Road User Safety. Report no. FHWA-SA-23-020. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2024. https://rosap.ntl.bts.gov/view/dot/89876.
United States. Department of Transportation. Federal Highway Administration. Office of Safety The Highway Safety Improvement Program (HSIP) 2022: Using HSIP to Improve Vulnerable Road User Safety. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2024, Report no. FHWA-SA-23-020, ROSA P. https://rosap.ntl.bts.gov/view/dot/89876.
This study explored the impact of connected vehicle alert messages on drivers’ responses to emergency vehicles. The participants drove a simulated vehicle either with or without SAE Level 2 automation (SAE International 2021). During the drive, an emergency vehicle approached the participant from behind. The participants’ vehicle connectivity was m
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Sanchez, R., Weaver, S., & Chao, S. F. (2024). Response to Emergency Vehicles When Driving in a Mixed Vehicle Fleet (Report No. FHWA-HRT-24-063). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/73566
Sanchez, Robert, Starla Weaver, and Szu-Fu Chao. Response to Emergency Vehicles When Driving in a Mixed Vehicle Fleet. Report no. FHWA-HRT-24-063. United States. Department of Transportation. Federal Highway Administration, 2024. https://rosap.ntl.bts.gov/view/dot/73566.
Sanchez, Robert, et al. Response to Emergency Vehicles When Driving in a Mixed Vehicle Fleet. United States. Department of Transportation. Federal Highway Administration, 2024, Report no. FHWA-HRT-24-063, ROSA P. https://rosap.ntl.bts.gov/view/dot/73566.
Inverted pavement (IP) consists of a lower modulus layer, typically an unbound crushed stone base, sandwiched between a cement-stabilized layer at the bottom and a thin asphalt concrete (AC) surfacing. This type of pavement is extensively used in South Africa, where it has proven to be an effective, low-cost solution for high-trafficked roads. The
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Al-Qadi, I. L., Tutumluer, E., Tseng, E., Qamhia, I., & Ozer, H. (2024). Inverted Pavements Synthesis (Report No. FHWA-HIF-24-023). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/78702
Al-Qadi, Imad L., Erol Tutumluer, Ester Tseng, Issam Qamhia, and Hasan Ozer. Inverted Pavements Synthesis. Report no. FHWA-HIF-24-023. United States. Department of Transportation. Federal Highway Administration, 2024. https://rosap.ntl.bts.gov/view/dot/78702.
Al-Qadi, Imad L., et al. Inverted Pavements Synthesis. United States. Department of Transportation. Federal Highway Administration, 2024, Report no. FHWA-HIF-24-023, ROSA P. https://rosap.ntl.bts.gov/view/dot/78702.
Six States from the Midwest U.S. gathered for a peer exchange and discussion on implementation activities to support Balanced Mix Design (BMD). The peer exchange was sponsored by the Federal Highway Administration (FHWA). The six States met to assess the state-of-practice for the technology, tools, and techniques in designing, verifying, and accept
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Bittner, J., Hajj, E. Y., Aschenbrener, T., Janes, N., & Rockwood, H. (2024). Midwest Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary (Report No. FHWA-HIF-24-030). United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements. https://rosap.ntl.bts.gov/view/dot/75870
Bittner, Jason, Elie Y Hajj, Tim Aschenbrener, Neil Janes, and Heidi Rockwood. Midwest Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary. Report no. FHWA-HIF-24-030. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2024. https://rosap.ntl.bts.gov/view/dot/75870.
Bittner, Jason, et al. Midwest Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2024, Report no. FHWA-HIF-24-030, ROSA P. https://rosap.ntl.bts.gov/view/dot/75870.
United States. Department of Transportation. Federal Highway Administration. Offices of Research, Development, and Technology
2024-02-01
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The primary objective of the study was to investigate how light-vehicle drivers' knowledge of partially automated truck platooning and how different platoon sizes (two- or three-truck platoon) and gap distances (0.6, 0.9, or 1.2 s) between the trucks influence the behavior of light-vehicle drivers entering, exiting, or traveling in the through lane
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United States. Department of Transportation. Federal Highway Administration. Offices of Research, Development, and Technology (2024). Effects of Signing and Configuration of Partially Automated Truck Platooning on Light-Vehicle Driver Behavior [techbrief] (Report No. FHWA-HRT-24-071). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/74087
United States. Department of Transportation. Federal Highway Administration. Offices of Research, Development, and Technology. Effects of Signing and Configuration of Partially Automated Truck Platooning on Light-Vehicle Driver Behavior [techbrief]. Report no. FHWA-HRT-24-071. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024. https://rosap.ntl.bts.gov/view/dot/74087.
United States. Department of Transportation. Federal Highway Administration. Offices of Research, Development, and Technology Effects of Signing and Configuration of Partially Automated Truck Platooning on Light-Vehicle Driver Behavior [techbrief]. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024, Report no. FHWA-HRT-24-071, ROSA P. https://rosap.ntl.bts.gov/view/dot/74087.
The ability to fully quantify the expected safety benefits of Complete Streets transformations using crash-based, data-driven safety analysis (DDSA) methods such as those in the Highway Safety Manual (AASHTO 2010) is limited. The lack of crash modification factors (CMFs) for many Complete Streets treatments is a primary reason for this limitation.
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Porter, R. J., Dunn, M., Kersavage, K., Gross, F. B., Chestnutt, C., Gross, A., Childress, K. P., Chandler, B., Mason, M., & Abel, S. (2024). Complete Streets — Safety Analysis (Report No. FHWA-HRT-24-074). United States. Federal Highway Administration. Office of Safety and Operations Research and Development. https://rosap.ntl.bts.gov/view/dot/74080
Porter, Richard J., Michael Dunn, Kristin Kersavage, Frank B. Gross, Catherine Chestnutt, Annette Gross, Kerry Perrillo Childress, Brian Chandler, Meghan Mason, and Sarah Abel. Complete Streets — Safety Analysis. Report no. FHWA-HRT-24-074. United States. Federal Highway Administration. Office of Safety and Operations Research and Development, 2024. https://rosap.ntl.bts.gov/view/dot/74080.
Porter, Richard J., et al. Complete Streets — Safety Analysis. United States. Federal Highway Administration. Office of Safety and Operations Research and Development, 2024, Report no. FHWA-HRT-24-074, ROSA P. https://rosap.ntl.bts.gov/view/dot/74080.
Asphalt rubber gap-graded mixtures are durable pavement layers with resistance to reflective cracking, rutting, and oxidation and have frictional characteristics due to the gapped grading of the aggregate.
Musselman, J. A., & Walbeck, T. (2024). Asphalt Rubber Gap-Graded Mixtures: How-To Document (Report No. FHWA-HIF-24-021). United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements. https://rosap.ntl.bts.gov/view/dot/75896
Musselman, James A. and Travis Walbeck. Asphalt Rubber Gap-Graded Mixtures: How-To Document. Report no. FHWA-HIF-24-021. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2024. https://rosap.ntl.bts.gov/view/dot/75896.
Musselman, James A., and Travis Walbeck Asphalt Rubber Gap-Graded Mixtures: How-To Document. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2024, Report no. FHWA-HIF-24-021, ROSA P. https://rosap.ntl.bts.gov/view/dot/75896.
United States. Department of Transportation. Federal Highway Administration
2024-02-01
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This fact sheet provides an overview of the role of the Lead Agency - State Department of Transportation (DOT), that oversees each Transportation Pooled Fund (TPF) study. This role is an opportunity to guide and shape national research and innovation collaboration efforts. For a State-led TPF study, a State DOT serves as the lead agency, administer
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United States. Department of Transportation. Federal Highway Administration (2024). Your Role as the Lead Agency—State Department of Transportation (DOT) (Report No. FHWA-HRT-24-046). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/73503
United States. Department of Transportation. Federal Highway Administration. Your Role as the Lead Agency—State Department of Transportation (DOT). Report no. FHWA-HRT-24-046. United States. Department of Transportation. Federal Highway Administration, 2024. https://rosap.ntl.bts.gov/view/dot/73503.
United States. Department of Transportation. Federal Highway Administration Your Role as the Lead Agency—State Department of Transportation (DOT). United States. Department of Transportation. Federal Highway Administration, 2024, Report no. FHWA-HRT-24-046, ROSA P. https://rosap.ntl.bts.gov/view/dot/73503.
Nine States from the Rocky Mountain West U.S. gathered for a peer exchange and discussion on implementation activities to support Balanced Mix Design (BMD). The peer exchange was sponsored by the Federal Highway Administration (FHWA). The nine States met to assess the state-of-practice for the technology, tools, and techniques in designing, verifyi
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Bittner, J., Hajj, E. Y., Aschenbrener, T., Janes, N., & Rockwood, H. (2024). Rocky Mountain West Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary (Report No. FHWA-HIF-24-029). United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements. https://rosap.ntl.bts.gov/view/dot/75871
Bittner, Jason, Elie Y Hajj, Tim Aschenbrener, Neil Janes, and Heidi Rockwood. Rocky Mountain West Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary. Report no. FHWA-HIF-24-029. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2024. https://rosap.ntl.bts.gov/view/dot/75871.
Bittner, Jason, et al. Rocky Mountain West Peer Exchange on Balanced Mix Design (BMD): Outcomes Summary. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2024, Report no. FHWA-HIF-24-029, ROSA P. https://rosap.ntl.bts.gov/view/dot/75871.
The objective of this study is to improve the quality control of steel bridge fabrication by expanding the available nondestructive testing options beyond conventional ultrasonic testing (UT) and radiographic inspection methods. The primary focus of this research is to assess the acceptability of phased array ultrasonic testing (PAUT) as an alterna
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Jose, N., & Azari, H. (2024). Implementation of Phased Array Ultrasonic Testing (PAUT) For Bridge Welds (Report No. FHWA-HRT-24-010). United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development. https://rosap.ntl.bts.gov/view/dot/73507
Jose, Nikesh and Hoda Azari. Implementation of Phased Array Ultrasonic Testing (PAUT) For Bridge Welds. Report no. FHWA-HRT-24-010. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2024. https://rosap.ntl.bts.gov/view/dot/73507.
Jose, Nikesh, and Hoda Azari Implementation of Phased Array Ultrasonic Testing (PAUT) For Bridge Welds. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2024, Report no. FHWA-HRT-24-010, ROSA P. https://rosap.ntl.bts.gov/view/dot/73507.
The North Carolina Department of Transportation (NCDOT) plans to replace two highway bridges on I–6064/I–95 over the Lumber River in Lumberton, NC. Hydraulic scour analysis of the planned bridge replacement resulted in deep scour depths, which NCDOT believed were excessive due to subsurface layers of cohesive soil that existed across the bridge sit
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Shan, H., Pagenkopf, J. R., Nicks, J., Xie, Z., Li, C., Wiblishauser, O., Huang, C., & Kerenyi, K. (2024). NextScour Case Study: The I–6064/I–95 Bridge Replacements Over the Lumber River in Lumberton, NC (Report No. FHWA-HRT-24-038). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/73509
Shan, Haoyin, James R. Pagenkopf, Jennifer Nicks, Zhaoding Xie, Chen Li, Otto Wiblishauser, Chao Huang, and Kornel Kerenyi. NextScour Case Study: The I–6064/I–95 Bridge Replacements Over the Lumber River in Lumberton, NC. Report no. FHWA-HRT-24-038. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024. https://rosap.ntl.bts.gov/view/dot/73509.
Shan, Haoyin, et al. NextScour Case Study: The I–6064/I–95 Bridge Replacements Over the Lumber River in Lumberton, NC. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024, Report no. FHWA-HRT-24-038, ROSA P. https://rosap.ntl.bts.gov/view/dot/73509.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2024-02-01
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National Travel Time Dashboard: Interstate Highways
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The Monthly Urban Congestion Report (UCR) provides a state-level overview of traffic congestion and reliability trends on Interstate highways. Published every month, the report compares data from the most recent month with the same month in the previous year. It uses travel time data from the Federal Highway Administration’s National Performance Ma
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United States. Department of Transportation. Federal Highway Administration. Office of Operations (2024). National Travel Time Dashboard: Interstate Highways, February 2024. United States. Department of Transportation. Federal Highway Administration. Office of Operations. https://rosap.ntl.bts.gov/view/dot/87929
United States. Department of Transportation. Federal Highway Administration. Office of Operations. National Travel Time Dashboard: Interstate Highways, February 2024. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2024. https://rosap.ntl.bts.gov/view/dot/87929.
United States. Department of Transportation. Federal Highway Administration. Office of Operations National Travel Time Dashboard: Interstate Highways, February 2024. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2024, ROSA P. https://rosap.ntl.bts.gov/view/dot/87929.
This document summarizes a selection of treatments that were of greatest interest to State departments of transportation (DOT) staff members and other practitioners who attended the Federal Highway Administration (FHWA) Workshop: Wrong-Way-Driving Safety Improvements. This compendium provides a brief description of each treatment, along with potent
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Avelar, R., Kutela, B., & Finley, M. D. (2024). Compendium of Wrong-Way-Driving Treatments and Countermeasures (Report No. FHWA-HRT-23-035). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/73275
Avelar, Raul, Boniphace Kutela, and Melisa D. Finley. Compendium of Wrong-Way-Driving Treatments and Countermeasures. Report no. FHWA-HRT-23-035. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024. https://rosap.ntl.bts.gov/view/dot/73275.
Avelar, Raul, et al. Compendium of Wrong-Way-Driving Treatments and Countermeasures. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024, Report no. FHWA-HRT-23-035, ROSA P. https://rosap.ntl.bts.gov/view/dot/73275.
United States. Department of Transportation. Federal Highway Administration
2024-02-01
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This brochure reveals how Complete Streets provide people living in and using rural town centers with safer multimodal access to essential destinations for all road users.
United States. Department of Transportation. Federal Highway Administration (2024). Complete Streets [Brochure] (Report No. FHWA-SA-24-011). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/86678
United States. Department of Transportation. Federal Highway Administration. Complete Streets [Brochure]. Report no. FHWA-SA-24-011. United States. Department of Transportation. Federal Highway Administration, 2024. https://rosap.ntl.bts.gov/view/dot/86678.
United States. Department of Transportation. Federal Highway Administration Complete Streets [Brochure]. United States. Department of Transportation. Federal Highway Administration, 2024, Report no. FHWA-SA-24-011, ROSA P. https://rosap.ntl.bts.gov/view/dot/86678.
This manual provides a comprehensive and practical guide for the design of storm drainage systems associated with transportation facilities. Information is provided for the design of storm drainage systems that collect, convey, and discharge stormwater flowing within and along the highway right-of-way. Methods and procedures are given for the hydra
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Kilgore, R., Atayee, A. T., & Herrmann, G. R. (2024). Urban Drainage Design Fourth Edition (Report No. FHWA HIF-24-006). United States. Federal Highway Administration. Office of Bridges and Structures. https://rosap.ntl.bts.gov/view/dot/74311
Kilgore, Roger, A. Tamim Atayee, and George R. Herrmann. Urban Drainage Design Fourth Edition. Report no. FHWA HIF-24-006. United States. Federal Highway Administration. Office of Bridges and Structures, 2024. https://rosap.ntl.bts.gov/view/dot/74311.
Kilgore, Roger, et al. Urban Drainage Design Fourth Edition. United States. Federal Highway Administration. Office of Bridges and Structures, 2024, Report no. FHWA HIF-24-006, ROSA P. https://rosap.ntl.bts.gov/view/dot/74311.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2024-02-01
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The Federal Highway Administration (FHWA) is pleased to announce the Excellence in Highway Safety Data Award, which is part of the Highway Data Analysis Excellence Awards Program. The award is designed to encourage university students to use Highway Safety Information System (HSIS) data to investigate a topic that advances highway safety and to dev
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology (2024). 2024 Excellence in Highway Safety Data (Report No. FHWA-HRT-24-075). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/73502
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. 2024 Excellence in Highway Safety Data. Report no. FHWA-HRT-24-075. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024. https://rosap.ntl.bts.gov/view/dot/73502.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology 2024 Excellence in Highway Safety Data. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2024, Report no. FHWA-HRT-24-075, ROSA P. https://rosap.ntl.bts.gov/view/dot/73502.
United States. Department of Transportation. Federal Highway Administration
2024-02-01
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This fact sheet provides information on the role and responsibilities of a Funding Contact for the Transportation Pooled Fund (TPF). These responsibilities include: Commits funds on behalf of the funding organization. Monitors and maintains records of remaining funds and sent fund transfers. Serves as the organization’s point of contact for all fun
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United States. Department of Transportation. Federal Highway Administration (2024). Your Role as a Funding Contact (Report No. FHWA-HRT-24-042). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/73501
United States. Department of Transportation. Federal Highway Administration. Your Role as a Funding Contact. Report no. FHWA-HRT-24-042. United States. Department of Transportation. Federal Highway Administration, 2024. https://rosap.ntl.bts.gov/view/dot/73501.
United States. Department of Transportation. Federal Highway Administration Your Role as a Funding Contact. United States. Department of Transportation. Federal Highway Administration, 2024, Report no. FHWA-HRT-24-042, ROSA P. https://rosap.ntl.bts.gov/view/dot/73501.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2024-02-01
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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
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2024). Traffic Volume Trends: February 2024. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/74271
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Traffic Volume Trends: February 2024. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2024. https://rosap.ntl.bts.gov/view/dot/74271.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Traffic Volume Trends: February 2024. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2024, ROSA P. https://rosap.ntl.bts.gov/view/dot/74271.
United States. Federal Highway Administration. Center for Accelerating Innovation
2024-02-01
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Innovator
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Innovator, published by the FHWA Center for Accelerating Innovation, advances implementation of innovative technologies and processes in the highway industry. Its audience is transportation professionals in highway agencies, trade and research groups, academia and the private sector, and the driving public.
United States. Federal Highway Administration. Center for Accelerating Innovation (2024). Innovator - January/February 2024 - Volume 17, Issue 100 (Report No. FHWA-24-CAI-001). United States. Federal Highway Administration. Center for Accelerating Innovation. https://rosap.ntl.bts.gov/view/dot/74738
United States. Federal Highway Administration. Center for Accelerating Innovation. Innovator - January/February 2024 - Volume 17, Issue 100. Report no. FHWA-24-CAI-001. United States. Federal Highway Administration. Center for Accelerating Innovation, 2024. https://rosap.ntl.bts.gov/view/dot/74738.
United States. Federal Highway Administration. Center for Accelerating Innovation Innovator - January/February 2024 - Volume 17, Issue 100. United States. Federal Highway Administration. Center for Accelerating Innovation, 2024, Report no. FHWA-24-CAI-001, ROSA P. https://rosap.ntl.bts.gov/view/dot/74738.
United States. Department of Transportation. Federal Highway Administration
2024-02-01
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This fact sheet provides an overview the role as the Lead Agency—Federal Highway Administration (FHWA) of A lead agency oversees each Transportation Pooled Fund (TPF) study. For an FHWA-led TPF study, a designated FHWA staff member administers the study from start to finish. As the lead agency, FHWA submits the project request, solicits partner age
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United States. Department of Transportation. Federal Highway Administration (2024). Your Role as the Lead Agency—Federal Highway Administration (FHWA) (Report No. FHWA-HRT-24-045). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/73499
United States. Department of Transportation. Federal Highway Administration. Your Role as the Lead Agency—Federal Highway Administration (FHWA). Report no. FHWA-HRT-24-045. United States. Department of Transportation. Federal Highway Administration, 2024. https://rosap.ntl.bts.gov/view/dot/73499.
United States. Department of Transportation. Federal Highway Administration Your Role as the Lead Agency—Federal Highway Administration (FHWA). United States. Department of Transportation. Federal Highway Administration, 2024, Report no. FHWA-HRT-24-045, ROSA P. https://rosap.ntl.bts.gov/view/dot/73499.
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