This brief summarizes an evaluation of the Federal Highway Administration’s (FHWA’s) Innovative Intersection Design (IID) program. FHWA’s IID research and development (R&D) includes diverging diamond interchanges (DDIs), restricted crossing U-turns (RCUTs), displaced left turns (DLTs), median U-turns (MUTs), and mini-roundabouts. The purpose of the
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Badgley, J., Fowler, J., Mahavier, K., & Peirce, S. (2021). FHWA Research and Technology Evaluation TechBrief: Innovative Intersection Design (Report No. FHWA-HRT-21-101). United States. Federal Highway Administration. Research and Technology Evaluation. https://rosap.ntl.bts.gov/view/dot/59932
Badgley, Jonathan, Joshua Fowler, Kendall Mahavier, and Sean Peirce. FHWA Research and Technology Evaluation TechBrief: Innovative Intersection Design. Report no. FHWA-HRT-21-101. United States. Federal Highway Administration. Research and Technology Evaluation, 2021. https://rosap.ntl.bts.gov/view/dot/59932.
Badgley, Jonathan, et al. FHWA Research and Technology Evaluation TechBrief: Innovative Intersection Design. United States. Federal Highway Administration. Research and Technology Evaluation, 2021, Report no. FHWA-HRT-21-101, ROSA P. https://rosap.ntl.bts.gov/view/dot/59932.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2021-10-01
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FlexMAT for Cracking is a Microsoft® Excel-based analysis tool for characterizing dynamic modulus and cracking of asphalt pavement mixtures from Asphalt Mixture Performance Tester (AMPT) test results. This includes determining the 2S2P1D dynamic modulus mastercurve coefficients and time-temperature shift factors. It analyzes the AMPT cyclic fatigue
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology (2021). FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Cyclic Fatigue Test (Report No. FHWA-HRT-21-055). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/87513
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Cyclic Fatigue Test. Report no. FHWA-HRT-21-055. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2021. https://rosap.ntl.bts.gov/view/dot/87513.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Cyclic Fatigue Test. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2021, Report no. FHWA-HRT-21-055, ROSA P. https://rosap.ntl.bts.gov/view/dot/87513.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-10-01
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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 (2021). Traffic Volume Trends: October 2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/59191
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. Traffic Volume Trends: October 2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/59191.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information Traffic Volume Trends: October 2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/59191.
The technology of electrically isolated tendons (EIT) is a concept to protect and monitor tendons against corrosion attack from the outside of the tendon, which is a common cause for premature degradation in corrosive environments. The technology is based on a full encapsulation of the tendon in a plastic duct, shielding the tendon from chlorides,
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Angst, U., & Büchler, M. (2021). State-of-the-Practice Report: Monitorable Post-Tensioning Systems (Report No. FHWA-HIF-19-094). United States. Federal Highway Administration. Office of Bridges and Structures. https://rosap.ntl.bts.gov/view/dot/72982
Angst, Ueli and Markus Büchler. State-of-the-Practice Report: Monitorable Post-Tensioning Systems. Report no. FHWA-HIF-19-094. United States. Federal Highway Administration. Office of Bridges and Structures, 2021. https://rosap.ntl.bts.gov/view/dot/72982.
Angst, Ueli, and Markus Büchler State-of-the-Practice Report: Monitorable Post-Tensioning Systems. United States. Federal Highway Administration. Office of Bridges and Structures, 2021, Report no. FHWA-HIF-19-094, ROSA P. https://rosap.ntl.bts.gov/view/dot/72982.
Emerging ISTD technology uses an innovative erosion head that more accurately measures soil erosion resistance, resulting in more cost-effective foundation designs and greater reliability and resiliency in bridge performance.
United States. Federal Highway Administration (2021). In-Situ Scour Testing Device (ISTD), State Demonstrations of Field Soil Tests, Watkins, CO [fact sheet] (Report No. FHWA-HRT-21-100). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58180
United States. Federal Highway Administration. In-Situ Scour Testing Device (ISTD), State Demonstrations of Field Soil Tests, Watkins, CO [fact sheet]. Report no. FHWA-HRT-21-100. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58180.
United States. Federal Highway Administration In-Situ Scour Testing Device (ISTD), State Demonstrations of Field Soil Tests, Watkins, CO [fact sheet]. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-100, ROSA P. https://rosap.ntl.bts.gov/view/dot/58180.
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: Maryland Department of Transportation State Highway Administration (Report No. FHWA-HOP-21-051). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/66534
Sankar, Param, Rama Krishna Boyapati, and Alan Pate. Data-Driven Work Zone Process Reviews Case Study: Maryland Department of Transportation State Highway Administration. Report no. FHWA-HOP-21-051. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/66534.
Sankar, Param, et al. Data-Driven Work Zone Process Reviews Case Study: Maryland Department of Transportation State Highway Administration. United States. Federal Highway Administration, 2021, Report no. FHWA-HOP-21-051, ROSA P. https://rosap.ntl.bts.gov/view/dot/66534.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2021-10-01
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FlexMAT for Cracking is a Microsoft® Excel-based analysis tool for characterizing dynamic modulus and cracking of asphalt pavement mixtures from Asphalt Mixture Performance Tester (AMPT) test results. This includes determining the 2S2P1D dynamic modulus mastercurve coefficients and time-temperature shift factors. It analyzes the AMPT cyclic fatigue
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology (2021). FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Dynamic Modulus Test (Report No. FHWA-HRT-21-054). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/87511
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Dynamic Modulus Test. Report no. FHWA-HRT-21-054. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2021. https://rosap.ntl.bts.gov/view/dot/87511.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Dynamic Modulus Test. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2021, Report no. FHWA-HRT-21-054, ROSA P. https://rosap.ntl.bts.gov/view/dot/87511.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2021-10-01
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FlexMAT for Cracking is a Microsoft® Excel-based analysis tool for characterizing dynamic modulus and cracking of asphalt pavement mixtures from Asphalt Mixture Performance Tester (AMPT) test results. This includes determining the 2S2P1D dynamic modulus mastercurve coefficients and time-temperature shift factors. It analyzes the AMPT cyclic fatigue
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology (2021). FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Stress Sweep Rutting Test (Report No. FHWA-HRT-21-056). United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. https://rosap.ntl.bts.gov/view/dot/87514
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology. FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Stress Sweep Rutting Test. Report no. FHWA-HRT-21-056. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2021. https://rosap.ntl.bts.gov/view/dot/87514.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology FlexMAT™ Asphalt Pavement Analysis Tools Summary and FlexMAT Specified Data Structure for Stress Sweep Rutting Test. United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology, 2021, Report no. FHWA-HRT-21-056, ROSA P. https://rosap.ntl.bts.gov/view/dot/87514.
The Proven Safety Countermeasure Initiative (PSCi) is a collection of 28 countermeasures and strategies effective in reducing roadway fatalities and serious injuries on our Nation’s highways. Transportation agencies are strongly encouraged to consider widespread implementation of PSCs to accelerate the achievement of local, State, and National safe
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Albee, M., & Bobitz, P. (2021). Making Our Roads Safer: One Countermeasure at a Time (Report No. FHWA-SA-21-071). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/88186
Albee, Matt and Phillip Bobitz. Making Our Roads Safer: One Countermeasure at a Time. Report no. FHWA-SA-21-071. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021. https://rosap.ntl.bts.gov/view/dot/88186.
Albee, Matt, and Phillip Bobitz Making Our Roads Safer: One Countermeasure at a Time. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2021, Report no. FHWA-SA-21-071, ROSA P. https://rosap.ntl.bts.gov/view/dot/88186.
This report built on a geospatial pilot effort by the Highway Safety Information System (HSIS) using data from Charlotte, NC. The main objective of this study was to spatially integrate HSIS data with multi-jurisdictional and emerging datasets to analyze two measures of pedestrian safety performance: the severity of a pedestrian crash that has occu
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Hamilton, I., Kersavage, K., Porter, R. J., Smith, K., Sanchez, J., Gayah, V. V., & Eccles, K. A. (2021). An Exploration of Pedestrian Safety Through the Integration of HSIS and Emerging Data Sources: Case Study in Charlotte, NC (Report No. FHWA-HRT-21-087). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/57960
Hamilton, Ian, Kristin Kersavage, Richard J. Porter, Keith Smith, Josie Sanchez, Vikash V. Gayah, and Kimberly A. Eccles. An Exploration of Pedestrian Safety Through the Integration of HSIS and Emerging Data Sources: Case Study in Charlotte, NC. Report no. FHWA-HRT-21-087. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/57960.
Hamilton, Ian, et al. An Exploration of Pedestrian Safety Through the Integration of HSIS and Emerging Data Sources: Case Study in Charlotte, NC. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-087, ROSA P. https://rosap.ntl.bts.gov/view/dot/57960.
United States. Federal Highway Administration. Office of Operations Research and Development
2021-10-01
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The CARMA Ecosystem has created six new message types to enable vehicle-to-everything (V2X) communication between vehicles and other entities for various CDA cooperation classes, as defined in Society of Automotive Engineers (SAE) J3216, which enables true cooperative behavior.
United States. Federal Highway Administration. Office of Operations Research and Development (2021). CARMA Adds to the Cooperative Driving Automation (CDA) Message Set to Improve Intelligent Transportation Systems (ITS) Communications [fact sheet] (Report No. FHWA-HRT-21-104). United States. Federal Highway Administration. Office of Operations Research and Development. https://rosap.ntl.bts.gov/view/dot/58179
United States. Federal Highway Administration. Office of Operations Research and Development. CARMA Adds to the Cooperative Driving Automation (CDA) Message Set to Improve Intelligent Transportation Systems (ITS) Communications [fact sheet]. Report no. FHWA-HRT-21-104. United States. Federal Highway Administration. Office of Operations Research and Development, 2021. https://rosap.ntl.bts.gov/view/dot/58179.
United States. Federal Highway Administration. Office of Operations Research and Development CARMA Adds to the Cooperative Driving Automation (CDA) Message Set to Improve Intelligent Transportation Systems (ITS) Communications [fact sheet]. United States. Federal Highway Administration. Office of Operations Research and Development, 2021, Report no. FHWA-HRT-21-104, ROSA P. https://rosap.ntl.bts.gov/view/dot/58179.
United States. Federal Highway Administration. Office of Natural Environment
2021-10-01
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This brief newsletter each month keeps transportation stakeholders up-to-date on various issues related to transportation and climate change.
United States. Federal Highway Administration. Office of Natural Environment (2021). Air Quality + Sustainable Transportation Highlights: September/October 2021 (Report No. FHWA-HEP-22-002). United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment. https://rosap.ntl.bts.gov/view/dot/62981
United States. Federal Highway Administration. Office of Natural Environment. Air Quality + Sustainable Transportation Highlights: September/October 2021. Report no. FHWA-HEP-22-002. United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment, 2021. https://rosap.ntl.bts.gov/view/dot/62981.
United States. Federal Highway Administration. Office of Natural Environment Air Quality + Sustainable Transportation Highlights: September/October 2021. United States. Department of Transportation. Federal Highway Administration. Office of Natural Environment, 2021, Report no. FHWA-HEP-22-002, ROSA P. https://rosap.ntl.bts.gov/view/dot/62981.
This TechBrief summarizes an evaluation of the effects of the Federal Highway Administration’s (FHWA’s) investment in high friction surface treatments (HFST) research, the availability and quality of such research, the deployment of the technology, and the safety impacts of HFSTs in the United States. HFSTs are high-quality aggregates that can be a
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Coppinger, K., Keen, M., Gissel, J., & Rainville, L. (2021). FHWA Research and Technology Evaluation TechBrief: High Friction Surface Treatments (Report No. FHWA-HRT-21-098). United States. Federal Highway Administration. Research and Technology Evaluation. https://rosap.ntl.bts.gov/view/dot/58307
Coppinger, Kaitlin, Matthew Keen, Jennifer Gissel, and Lydia Rainville. FHWA Research and Technology Evaluation TechBrief: High Friction Surface Treatments. Report no. FHWA-HRT-21-098. United States. Federal Highway Administration. Research and Technology Evaluation, 2021. https://rosap.ntl.bts.gov/view/dot/58307.
Coppinger, Kaitlin, et al. FHWA Research and Technology Evaluation TechBrief: High Friction Surface Treatments. United States. Federal Highway Administration. Research and Technology Evaluation, 2021, Report no. FHWA-HRT-21-098, ROSA P. https://rosap.ntl.bts.gov/view/dot/58307.
Innovative intersection designs provide dedicated paths through the intersection for pedestrians and bicyclists. The bikeway is set back from the parallel motor vehicle traffic, which makes bicyclists more visible to turning drivers than in a conventional intersection. Corner islands are a key feature of the design. They create a bike queue area af
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United States. Federal Highway Administration (2021). Innovative Intersection Designs for Pedestrians and Bicyclists [brochure] (Report No. FHWA-HRT-21-097). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58021
United States. Federal Highway Administration. Innovative Intersection Designs for Pedestrians and Bicyclists [brochure]. Report no. FHWA-HRT-21-097. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58021.
United States. Federal Highway Administration Innovative Intersection Designs for Pedestrians and Bicyclists [brochure]. United States. Federal Highway Administration, 2021, Report no. FHWA-HRT-21-097, ROSA P. https://rosap.ntl.bts.gov/view/dot/58021.
United States. Department of Agriculture. Forest Service
2021-10-01
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In 2020, the Mount Hood National Forest experienced unprecedented catastrophic wildfire events that damaged recreational sites and transportation assets along the Clackamas River corridor. A 19-mile segment of OR 224, the primary route connecting travelers from the Portland metro area to the forest, has been closed to the public since the Riverside
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United States. Department of Agriculture. Forest Service (2021). Oregon Route 224 Corridor Study: Phase 1 – Existing Conditions Assessment. United States. Federal Highway Administration. Western Federal Lands Highway Division. https://doi.org/10.21949/1529377
United States. Department of Agriculture. Forest Service. Oregon Route 224 Corridor Study: Phase 1 – Existing Conditions Assessment. United States. Federal Highway Administration. Western Federal Lands Highway Division, 2021. https://doi.org/10.21949/1529377.
United States. Department of Agriculture. Forest Service Oregon Route 224 Corridor Study: Phase 1 – Existing Conditions Assessment. United States. Federal Highway Administration. Western Federal Lands Highway Division, 2021, ROSA P. https://doi.org/10.21949/1529377.
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: Virginia Department of Transportation (Report No. FHWA-HOP-21-053). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/66535
Sankar, Param, Rama Krishna Boyapati, and Alan Pate. Data-Driven Work Zone Process Reviews Case Study: Virginia Department of Transportation. Report no. FHWA-HOP-21-053. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/66535.
Sankar, Param, et al. Data-Driven Work Zone Process Reviews Case Study: Virginia Department of Transportation. United States. Federal Highway Administration, 2021, Report no. FHWA-HOP-21-053, ROSA P. https://rosap.ntl.bts.gov/view/dot/66535.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-10-01
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The Weekly 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 Adminis
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information (2021). Special Issue - Weekly Motor Fuel Report: Gasoline Product Supplied for Fiscal Year Week No. 1, Data Complete Through 10/1/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information. https://rosap.ntl.bts.gov/view/dot/58193
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. 1, Data Complete Through 10/1/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021. https://rosap.ntl.bts.gov/view/dot/58193.
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. 1, Data Complete Through 10/1/2021. United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/58193.
United States. Federal Highway Administration. Center for Accelerating Innovation
2021-10-01
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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 (2021). Innovator - September/October 2021 - Volume 15, Issue 86 (Report No. FHWA-21-CAI-022). United States. Federal Highway Administration. Center for Accelerating Innovation. https://rosap.ntl.bts.gov/view/dot/58496
United States. Federal Highway Administration. Center for Accelerating Innovation. Innovator - September/October 2021 - Volume 15, Issue 86. Report no. FHWA-21-CAI-022. United States. Federal Highway Administration. Center for Accelerating Innovation, 2021. https://rosap.ntl.bts.gov/view/dot/58496.
United States. Federal Highway Administration. Center for Accelerating Innovation Innovator - September/October 2021 - Volume 15, Issue 86. United States. Federal Highway Administration. Center for Accelerating Innovation, 2021, Report no. FHWA-21-CAI-022, ROSA P. https://rosap.ntl.bts.gov/view/dot/58496.
In February 2018, the Federal Highway Administration (FHWA) published the Guidebook for Measuring Multimodal Network Connectivity, which outlines approaches to integrating pedestrian and bicycle network connectivity measures into State, metropolitan, and local transportation planning processes. Multimodal networks are defined as accessible, interco
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United States. Federal Highway Administration (2021). Measuring Multimodal Network Connectivity Pilot Grant Program Final Report (Report No. FHWA-HEP-21-024). United States. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/58167
United States. Federal Highway Administration. Measuring Multimodal Network Connectivity Pilot Grant Program Final Report. Report no. FHWA-HEP-21-024. United States. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/58167.
United States. Federal Highway Administration Measuring Multimodal Network Connectivity Pilot Grant Program Final Report. United States. Federal Highway Administration, 2021, Report no. FHWA-HEP-21-024, ROSA P. https://rosap.ntl.bts.gov/view/dot/58167.
United States. Department of Transportation. Federal Highway Administration
2021-10-01
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The Federal Highway Administration (FHWA) is publishing this list of State Departments of Transportation (DOTs) and Metropolitan Planning Organizations (MPOs) who are required to establish targets and report progress for the performance measures related to the Congestion Mitigation and Air Quality Improvement (CMAQ) Program. There are three measure
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United States. Department of Transportation. Federal Highway Administration (2021). Applicability Determination: CMAQ Traffic Congestion and CMAQ On-Road Mobile Source Emissions Measures (23 CFR 490.707 and 490.807) as of October 1, 2021. United States. Department of Transportation. Federal Highway Administration. https://rosap.ntl.bts.gov/view/dot/72434
United States. Department of Transportation. Federal Highway Administration. Applicability Determination: CMAQ Traffic Congestion and CMAQ On-Road Mobile Source Emissions Measures (23 CFR 490.707 and 490.807) as of October 1, 2021. United States. Department of Transportation. Federal Highway Administration, 2021. https://rosap.ntl.bts.gov/view/dot/72434.
United States. Department of Transportation. Federal Highway Administration Applicability Determination: CMAQ Traffic Congestion and CMAQ On-Road Mobile Source Emissions Measures (23 CFR 490.707 and 490.807) as of October 1, 2021. United States. Department of Transportation. Federal Highway Administration, 2021, ROSA P. https://rosap.ntl.bts.gov/view/dot/72434.
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