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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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.
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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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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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.
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. 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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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. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-10-01
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PDF
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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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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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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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2021-10-01
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PDF
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
2021-10-01
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PDF
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
2021-10-01
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PDF
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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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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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-09-26
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The Weekly Traffic Volume Report estimates the vehicle miles traveled (VMT) for interstate highways and how the total travel measured by VMT compares with travel that occurred in the same week of the previous year. The VMT is further split into passenger vehicle and truck components. The information gives new insights into the effect on traffic by
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-09-24
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PDF
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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This document discusses the Data Management Plan (DMP) for the University of Washington (UW) ITS4US Deployment Project. This project currently is in Phase 1 planning and systems engineering development, in which the preliminary idea is developed into a structured concept that is suitable for further design, building, testing, and operation. The str
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The FHWA 2020 Urban Congestion Trends report details trends and the current state of congestion and reliability on the NHS in 52 of the largest metropolitan areas in the United States. This report also includes examples of how agencies are using the NPMRDS for performance reporting and analysis, as well as for operational strategy evaluation and be
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