This Technical Brief summarizes techniques employed by State DOTs in the use of high doses of reclaimed asphalt pavement (RAP) in asphalt mixtures and communicates the benefits observed.
Hand, A. J. T., & Aschenbrener, T. (2021). Resource Responsible Use of Reclaimed Asphalt Pavement in Asphalt Mixtures [tech brief] (Report No. FHWA-HIF-22-003). United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements. https://rosap.ntl.bts.gov/view/dot/59939
Hand, Adam J. T. and T. Aschenbrener. Resource Responsible Use of Reclaimed Asphalt Pavement in Asphalt Mixtures [tech brief]. Report no. FHWA-HIF-22-003. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2021. https://rosap.ntl.bts.gov/view/dot/59939.
Hand, Adam J. T., and T. Aschenbrener Resource Responsible Use of Reclaimed Asphalt Pavement in Asphalt Mixtures [tech brief]. United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements, 2021, Report no. FHWA-HIF-22-003, ROSA P. https://rosap.ntl.bts.gov/view/dot/59939.
Traffic Optimization for Signalized Corridors (TOSCo) is an innovative connected and automated vehicle application that has the potential to generate substantial mobility and air quality benefits for public agencies and potential fuel savings benefits for the traveling public. Under the TOSCo system, vehicles equipped with TOSCo functionality use s
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Huang, Z., Ma, J., Guo, Y., Matout, N., Feng, Y., Florence, D., Balke, K., LeBlanc, D., Wu, G., Adla, R., Guenther, H. J., Hussain, S., Moradi-Pari, E., Naes, T., Probert, N., Kumar, V., Williams, R., Yoshida, H., Yumak, T., ... Goudy, R. (2021). Developing Analysis, Modeling, and Simulation Tools for Connected Automated Vehicle Applications: Traffic Optimization for Signalized Corridors–Case Studies in Ann Arbor, MI, and Conroe, TX (Report No. FHWA-HRT-21-085). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58023
Huang, Zhitong, Jiaqi Ma, Yi Guo, Nagham Matout, Yiheng Feng, David Florence, and Kevin Balke, et al.. Developing Analysis, Modeling, and Simulation Tools for Connected Automated Vehicle Applications: Traffic Optimization for Signalized Corridors–Case Studies in Ann Arbor, MI, and Conroe, TX. Report no. FHWA-HRT-21-085. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58023.
Huang, Zhitong, et al. Developing Analysis, Modeling, and Simulation Tools for Connected Automated Vehicle Applications: Traffic Optimization for Signalized Corridors–Case Studies in Ann Arbor, MI, and Conroe, TX. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-085, ROSA P. https://rosap.ntl.bts.gov/view/dot/58023.
Federal regulations in 23 CFR part 630 subpart J require State highway agencies to conduct a Work Zone Process Review (WZPR) every 2 years to evaluate work zone processes and procedures, as well as identify systematic improvements to current and future projects. The Federal Highway Administration now encourages agencies to use a data-driven approac
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Sankar, P., Boyapati, R. K., & Pate, A. (2021). Data-Driven Work Zone Process Reviews Case Study: Iowa Department of Transportation (Report No. FHWA-HOP-21-052). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/66533
Sankar, Param, Rama Krishna Boyapati, and Alan Pate. Data-Driven Work Zone Process Reviews Case Study: Iowa Department of Transportation. Report no. FHWA-HOP-21-052. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/66533.
Sankar, Param, et al. Data-Driven Work Zone Process Reviews Case Study: Iowa Department of Transportation. United States. Federal Highway Administration, 2021, Report no. FHWA-HOP-21-052, ROSA P. https://rosap.ntl.bts.gov/view/dot/66533.
This project’s ultimate deliverable is a functional Vulnerable User Density Dashboard (https://mti.umd.edu/sdi) for the state of Maryland. The dashboard uses mobile device location data and electric scooter volume data to reflect pedestrian, bicycle, and electric scooter travel volumes and their exposure to roadway safety risk across all roadways i
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DatasetSupporting Files
Xiong, C., Mahmoudi, J., Luo, W., Yang, M., Zheng, J., & Delion, C. (2021). A Data-Driven Safety Dashboard Assessing Maryland Statewide Density Exposure of Pedestrians, Bicycles, and E-Scooters [supporting datasets]. Maryland Department of Transportation. State Highway Administration. https://rosap.ntl.bts.gov/view/dot/61320
Xiong, Chenfeng, Jina Mahmoudi, Weiyu Luo, Mofeng Yang, Jianyang Zheng, and Carole Delion. A Data-Driven Safety Dashboard Assessing Maryland Statewide Density Exposure of Pedestrians, Bicycles, and E-Scooters [supporting datasets]. Maryland Department of Transportation. State Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/61320.
Xiong, Chenfeng, et al. A Data-Driven Safety Dashboard Assessing Maryland Statewide Density Exposure of Pedestrians, Bicycles, and E-Scooters [supporting datasets]. Maryland Department of Transportation. State Highway Administration, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/61320.
This report documents research undertaken to explore the use of unmanned aerial systems (UAS) to support bridge inspection. It addresses UAS platforms and sensors used to assist or augment inspections, the data-collection needs that UAS can meet, and means and methods for managing the tremendous amount of data that can be collected by UAS-mounted s
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Neubauer, K., Bullard, E., & Blunt, R. (2021). Collection of Data with Unmanned Aerial Systems (UAS) for Bridge Inspection and Construction Inspection (Report No. FHWA-HRT-21-086). United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development. https://rosap.ntl.bts.gov/view/dot/57597
Neubauer, Kenneth, Erik Bullard, and Robert Blunt. Collection of Data with Unmanned Aerial Systems (UAS) for Bridge Inspection and Construction Inspection. Report no. FHWA-HRT-21-086. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2021. https://rosap.ntl.bts.gov/view/dot/57597.
Neubauer, Kenneth, et al. Collection of Data with Unmanned Aerial Systems (UAS) for Bridge Inspection and Construction Inspection. United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development, 2021, Report no. FHWA-HRT-21-086, ROSA P. https://rosap.ntl.bts.gov/view/dot/57597.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2021-09-01
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Urban Congestion Report (UCR)
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The Urban Congestion Report (UCR) is produced on a quarterly basis and characterizes the most recent traffic congestion and reliability trends at the national and city level. Each quarterly UCR compares data from the most recent three months to the same three months in the previous year.
United States. Department of Transportation. Federal Highway Administration. Office of Operations (2021). Urban Congestion Report (UCR): Year-to-Year Trends in the U.S. for July through September 2021. United States. Department of Transportation. Federal Highway Administration. Office of Operations. https://rosap.ntl.bts.gov/view/dot/87751
United States. Department of Transportation. Federal Highway Administration. Office of Operations. Urban Congestion Report (UCR): Year-to-Year Trends in the U.S. for July through September 2021. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2021. https://rosap.ntl.bts.gov/view/dot/87751.
United States. Department of Transportation. Federal Highway Administration. Office of Operations Urban Congestion Report (UCR): Year-to-Year Trends in the U.S. for July through September 2021. United States. Department of Transportation. Federal Highway Administration. Office of Operations, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/87751.
The Federal Highway Administration's Long-Term Pavement Performance (LTPP) program issues a triannual newsletter to inform you about the progress and activities of the program. Brief updates on progress in important program activities are provided, including data collection, data releases, new products and publications, pooled fund studies, and dat
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Long-Term Pavement Performance Program (U.S.) (2021). LTPP Newsletter - Summer Issue - September 2021 (Report No. FHWA-HRT-21-099). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58306
Long-Term Pavement Performance Program (U.S.). LTPP Newsletter - Summer Issue - September 2021. Report no. FHWA-HRT-21-099. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58306.
Long-Term Pavement Performance Program (U.S.) LTPP Newsletter - Summer Issue - September 2021. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-099, ROSA P. https://rosap.ntl.bts.gov/view/dot/58306.
For this validation study, NREL compiled traffic volume data from permanent traffic counters at over 500 locations across the U.S. These data were used to validate annual average daily traffic (AADT) estimates developed by Streetlight Data using passive data sources. The analysis revealed a strong correlation between estimates derived from passive
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Fish, J. K., Young, S. E., Wilson, A., & Borlaug, B. (2021). Validation of Non-Traditional Approaches to Annual Average Daily Traffic (AADT) Volume Estimation (Report No. FHWA-PL-21-033). United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/64900
Fish, Joseph K., Stanley E. Young, Alana Wilson, and Brennan Borlaug. Validation of Non-Traditional Approaches to Annual Average Daily Traffic (AADT) Volume Estimation. Report no. FHWA-PL-21-033. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/64900.
Fish, Joseph K., et al. Validation of Non-Traditional Approaches to Annual Average Daily Traffic (AADT) Volume Estimation. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, Report no. FHWA-PL-21-033, ROSA P. https://rosap.ntl.bts.gov/view/dot/64900.
This report explains how to evaluate steel bridge details for susceptibility to constraint-induced fracture. The report begins with a review of fundamental principles of ductile behavior of steel structures and the effects of constraint and stress triaxiality. A brief history of constraint-induced fractures of steel bridges in the United States and
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Coletti, D., Chavel, B. W., Ream, A., Bennett, C., Connor, R., Frank, K., Grubb, M. A., Hubbard, F., Medlock, R., Miller, D., & Russo, F. (2021). Evaluation of Steel Bridge Details for Susceptibility to Constraint-Induced Fracture (Report No. FHWA-HIF-21-046). United States. Federal Highway Administration. Office of Bridges and Structures. https://rosap.ntl.bts.gov/view/dot/59162
Coletti, Domenic, Brandon W. Chavel, Anthony Ream, Caroline Bennett, Robert Connor, Karl Frank, and Michael A. Grubb, et al.. Evaluation of Steel Bridge Details for Susceptibility to Constraint-Induced Fracture. Report no. FHWA-HIF-21-046. United States. Federal Highway Administration. Office of Bridges and Structures, 2021. https://rosap.ntl.bts.gov/view/dot/59162.
Coletti, Domenic, et al. Evaluation of Steel Bridge Details for Susceptibility to Constraint-Induced Fracture. United States. Federal Highway Administration. Office of Bridges and Structures, 2021, Report no. FHWA-HIF-21-046, ROSA P. https://rosap.ntl.bts.gov/view/dot/59162.
The Federal Highway Administration’s (FHWA) Safety Compass newsletter aims to increase highway safety awareness and to provide resources to the highway safety community to help save lives. The newsletter is published three times a year and includes articles on safety-focused offerings from FHWA, other DOT modes; our State, Local, and Tribal partner
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United States. Federal Highway Administration (2021). Safety Compass Newsletter [Fall 2021: Volume 15 Issue 3]. United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/58500
United States. Federal Highway Administration. Safety Compass Newsletter [Fall 2021: Volume 15 Issue 3]. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021. https://rosap.ntl.bts.gov/view/dot/58500.
United States. Federal Highway Administration Safety Compass Newsletter [Fall 2021: Volume 15 Issue 3]. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/58500.
This document is one in a series of technical summaries that accompany the forthcoming Federal Highway Administration report, Collection of Data with Unmanned Aerial Systems (UAS) for Bridge Inspection and Construction Inspection.
Futron Corporation, & VHB/Vanasse Hangen Brustlin, Inc. (2021). Effective Practices for Routine Bridge Inspections Using Unmanned Aerial Systems [techbrief] (Report No. FHWA-HRT-21-083). United States. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/57958
Futron Corporation and VHB/Vanasse Hangen Brustlin, Inc.. Effective Practices for Routine Bridge Inspections Using Unmanned Aerial Systems [techbrief]. Report no. FHWA-HRT-21-083. United States. Federal Highway Administration. Office of Research, Development, and Technology, 2021. https://rosap.ntl.bts.gov/view/dot/57958.
Futron Corporation, et al. Effective Practices for Routine Bridge Inspections Using Unmanned Aerial Systems [techbrief]. United States. Federal Highway Administration. Office of Research, Development, and Technology, 2021, Report no. FHWA-HRT-21-083, ROSA P. https://rosap.ntl.bts.gov/view/dot/57958.
This case study presents a safety analysis conducted by the Wisconsin Department of Transportation (WisDOT) at the intersection of State Highway 75 (WIS 75) and Plank Road (County Road A) in Racine County, WI. WisDOT proactively identified key safety needs early in the project development process and used a data-driven approach to evaluate the safe
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Hamilton, I. (2021). WIS 75 Intersection Screening & Project Development Process (Report No. FHWA-SA-21-074). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/63018
Hamilton, Ian. WIS 75 Intersection Screening & Project Development Process. Report no. FHWA-SA-21-074. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021. https://rosap.ntl.bts.gov/view/dot/63018.
Hamilton, Ian WIS 75 Intersection Screening & Project Development Process. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021, Report no. FHWA-SA-21-074, ROSA P. https://rosap.ntl.bts.gov/view/dot/63018.
This report summarizes proceedings of a virtual peer exchange sponsored by the Federal Highway Administration (FHWA) and hosted by the Association of Metropolitan Planning Organizations (AMPO) on June 22–23, 2021. The purpose of the peer exchange was to discuss how metropolitan planning organizations (MPOs) can build MPO capacity for using geograph
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Cahill, P., & Green, M. (2021). GIS and Equity Peer Exchange: A TPCB Peer Exchange Event (Report No. FHWA-HEP-21-047;DOT-VNTSC-FHWA-21-09). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/59252
Cahill, Patricia and Michael Green. GIS and Equity Peer Exchange: A TPCB Peer Exchange Event. Report no. FHWA-HEP-21-047;DOT-VNTSC-FHWA-21-09. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/59252.
Cahill, Patricia, and Michael Green GIS and Equity Peer Exchange: A TPCB Peer Exchange Event. United States. Federal Highway Administration, 2021, Report no. FHWA-HEP-21-047;DOT-VNTSC-FHWA-21-09, ROSA P. https://rosap.ntl.bts.gov/view/dot/59252.
United States. Department of Transportation. Federal Highway Administration
2021-09-01
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Although several factors can influence the performance of an asphalt pavement, one of the most important is in-place density. A small increase in density can potentially lead to a significant increase in service life of asphalt. Highway agencies use specifications to achieve acceptable in-place density on their asphalt pavements. Density acceptance
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United States. Department of Transportation. Federal Highway Administration (2021). Enhanced In-Place Density: Example Approaches to Obtain Acceptable In-Place Density. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/56222
United States. Department of Transportation. Federal Highway Administration. Enhanced In-Place Density: Example Approaches to Obtain Acceptable In-Place Density. United States. Department of Transportation. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/56222.
United States. Department of Transportation. Federal Highway Administration Enhanced In-Place Density: Example Approaches to Obtain Acceptable In-Place Density. United States. Department of Transportation. Federal Highway Administration, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/56222.
This technical manual describes the Federal Highway Administration’s Traffic Noise Model (TNM) Version 3.1. Chapter 2 describes the process of determining noise emissions and levels at a reference location 15 m (50 ft) from the traffic noise source. This includes: the geometric discretizing of the study in the horizontal plane into elemental triang
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Hastings, A. L. (2021). Traffic Noise Model 3.1 - Technical Manual (Report No. FHWA-HEP-21-041). United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/80951
Hastings, Aaron L.. Traffic Noise Model 3.1 - Technical Manual. Report no. FHWA-HEP-21-041. United States. Department of Transportation. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/80951.
Hastings, Aaron L. Traffic Noise Model 3.1 - Technical Manual. United States. Department of Transportation. Federal Highway Administration, 2021, Report no. FHWA-HEP-21-041, ROSA P. https://rosap.ntl.bts.gov/view/dot/80951.
CARMASM is an initiative to enable collaboration for research and development of cooperative driving automation (CDA). The goal of CDA is to improve safety, traffic throughput, and energy efficiency of the transportation network by enabling vehicles and the infrastructure to communicate to coordinate movement. This project aims to advance the CARMA
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Soleimaniamiri, S., Li, X. (., Yao, H., Ghiasi, A., Vadakpat, G., Bujanovic, P., Lochrane, T., Stark, J., Blizzard, K., Hale, D., & Racha, S. (2021). Cooperative Automation Research: CARMA Proof-of-Concept Transportation System Management and Operations Use Case 2 (Report No. FHWA-HRT-21-069). United States. Federal Highway Administration. Office of Operations Research and Development. https://rosap.ntl.bts.gov/view/dot/58020
Soleimaniamiri, Saeid, Xiaopeng (Shaw) Li, Handong Yao, Amir Ghiasi, Govind Vadakpat, Pavle Bujanovic, and Taylor Lochrane, et al.. Cooperative Automation Research: CARMA Proof-of-Concept Transportation System Management and Operations Use Case 2. Report no. FHWA-HRT-21-069. United States. Federal Highway Administration. Office of Operations Research and Development, 2021. https://rosap.ntl.bts.gov/view/dot/58020.
Soleimaniamiri, Saeid, et al. Cooperative Automation Research: CARMA Proof-of-Concept Transportation System Management and Operations Use Case 2. United States. Federal Highway Administration. Office of Operations Research and Development, 2021, Report no. FHWA-HRT-21-069, ROSA P. https://rosap.ntl.bts.gov/view/dot/58020.
Cooperative driving automation (CDA) aims to improve the safety, traffic throughput, and energy efficiency of the transportation network by allowing vehicles and infrastructure to work together to coordinate movement. The objective of this project is to advance the CARMASM ecosystem to enable further capabilities for CDA participants to interact wi
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Soleimaniamiri, S., Li, X. (., Yao, H., Ghiasi, A., Vadakpat, G., Bujanovic, P., Lochrane, T., Stark, J., Hale, D., & Racha, S. (2021). Cooperative Automation Research: CARMA Proof-of-Concept Transportation System Management and Operations Use Case 4 - Dynamic Lane Assignment (Report No. FHWA-HRT-21-068). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58024
Soleimaniamiri, Saeid, Xiaopeng (Shaw) Li, Handong Yao, Amir Ghiasi, Govind Vadakpat, Pavle Bujanovic, Taylor Lochrane, John Stark, David Hale, and Sujith Racha. Cooperative Automation Research: CARMA Proof-of-Concept Transportation System Management and Operations Use Case 4 - Dynamic Lane Assignment. Report no. FHWA-HRT-21-068. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58024.
Soleimaniamiri, Saeid, et al. Cooperative Automation Research: CARMA Proof-of-Concept Transportation System Management and Operations Use Case 4 - Dynamic Lane Assignment. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-068, ROSA P. https://rosap.ntl.bts.gov/view/dot/58024.
Connected and automated vehicle (CAV) technologies offer potentially transformative societal impacts, including significant mobility, safety, and environmental benefits. Traffic analysis, modeling, and simulation (AMS) tools provide an efficient means to evaluate transportation improvement projects before deployment. However, current AMS tools are
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Huang, Z., Hale, D. K., Shladover, S. E., Lu, X. Y., Liu, H., Li, Q., Li, X., Mahmassani, H., Talebpour, A., Hosseini, M., & Elfar, A. (2021). Developing Analysis, Modeling, and Simulation Tools for Connected and Automated Vehicle Applications (Report No. FHWA-HRT-21-077). United States. Federal Highway Administration. Office of Operations Research and Development. https://rosap.ntl.bts.gov/view/dot/57956
Huang, Zhitong, David K. Hale, Steven E. Shladover, Xiao-Yun Lu, Hao Liu, Qianwen Li, and Xiaopeng Li, et al.. Developing Analysis, Modeling, and Simulation Tools for Connected and Automated Vehicle Applications. Report no. FHWA-HRT-21-077. United States. Federal Highway Administration. Office of Operations Research and Development, 2021. https://rosap.ntl.bts.gov/view/dot/57956.
Huang, Zhitong, et al. Developing Analysis, Modeling, and Simulation Tools for Connected and Automated Vehicle Applications. United States. Federal Highway Administration. Office of Operations Research and Development, 2021, Report no. FHWA-HRT-21-077, ROSA P. https://rosap.ntl.bts.gov/view/dot/57956.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2021-09-01
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The Pedestrian and Bike Forum newsletter provides information to FHWA stakeholders on reducing the number of pedestrian- and bicycle-related highway fatalities and serious injuries. Topics include updates on FHWA programs, spotlights on State and local noteworthy practices, initiatives with partner organizations, and upcoming events. It is publishe
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United States. Department of Transportation. Federal Highway Administration. Office of Safety (2021). Pedestrian and Bike Forum Newsletter [Volume 82, Fall 2021]. United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/62448
United States. Department of Transportation. Federal Highway Administration. Office of Safety. Pedestrian and Bike Forum Newsletter [Volume 82, Fall 2021]. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021. https://rosap.ntl.bts.gov/view/dot/62448.
United States. Department of Transportation. Federal Highway Administration. Office of Safety Pedestrian and Bike Forum Newsletter [Volume 82, Fall 2021]. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/62448.
Every Day Counts (EDC) is the Federal Highway Administration’s (FHWA’s) program to advance a culture of innovation in the transportation community in partnership with public and private stakeholders. Through this State-based effort, FHWA coordinates rapid deployment of proven strategies and technologies to shorten the project delivery process, enha
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United States. Federal Highway Administration (2021). Every Day Counts: Innovation for a Nation on the Move - EDC-6 Progress Report #1, September 2021 (Report No. FHWA-21-CAI-023). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58314
United States. Federal Highway Administration. Every Day Counts: Innovation for a Nation on the Move - EDC-6 Progress Report #1, September 2021. Report no. FHWA-21-CAI-023. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58314.
United States. Federal Highway Administration Every Day Counts: Innovation for a Nation on the Move - EDC-6 Progress Report #1, September 2021. United States. Federal Highway Administration, 2021, Report no. FHWA-21-CAI-023, ROSA P. https://rosap.ntl.bts.gov/view/dot/58314.
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