University of Wyoming Research Corporation. Western Research Institute
2016-05-01
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The USAT is a new thin-film (300 μm) short- and longterm aging test developed by Western Research Institute (WRI), with funding and guidance provided by the Federal Highway Administration (FHWA). USAT is proposed as an alternative to standard RTFO and PAV testing. The RTFO is not suitable for simulating the oxidative aging that occurs during “warm”
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Quality data are the foundation for making important decisions regarding the design, operation, and safety of roadways. Using roadway and traffic data together with crash data can help agencies make decisions that are fiscally responsible and improve the safety of the roadways for all users. The Federal Highway Administration (FHWA) Office of Safet
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High Friction Surface Treatment (HFST) is a safety countermeasure that immediately reduces crashes, injuries, and fatalities associated with friction demand issues. The treatment can help compensate for deficient geometric designs, such as sharp curves, by providing the necessary friction to maintain traction on the intended path. This publication
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2016-05-01
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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 Safety
2016-05-01
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From 2006 to 2010, Thurston County, Washington experienced 177 fatal and serious injury crashes on the county’s road network, of which about 70 percent is rural. Similar to other local road networks, the crashes were not concentrated in specific locations. The County had been deploying many low-cost safety improvements such as signing, pavement mar
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2016-05-01
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In 2010, the Tennessee Department of Transportation (TDOT) created a Safety Office to analyze crash types, causes, and severity. In 2011, Tennessee adopted their Roadway Departure Implementation Plan, which included high friction surface treatments (HFST). Up to that time, TDOT had implemented HFST at ten locations statewide, primarily for lengthen
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2016-05-01
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The Texas Department of Transportation (TxDOT) explored ways to improve horizontal curve safety by identifying whether geometric improvements or pavement friction restorations would best address safety concerns associated with a particular curve. TxDOT wanted to maximize the investment’s benefit and minimize the need for additional improvements.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2016-05-01
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We live in an age of data, where decisions about the allocation of limited resources are based on quantifiable benefits. But you don’t need to be a data expert to be able to create practices and procedures that will help you to: Identify relationships between safety, roadway features, and user exposure; Recognize location characteristics and their
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2016-05-01
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When typical low-cost safety improvements, such as signing and delineation, do not reduce crashes, the Kentucky Transportation Cabinet’s (KYTC) options are limited. Narrow, winding roads are prevalent in Kentucky and lane widths less than 9 feet are not uncommon. In many instances roads have very little right-of-way, making more substantial treatme
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2016-05-01
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Meeting the required friction demand at curves is a challenge; vehicles require even greater friction on wet road surfaces, making curves more susceptible to crashes. High Friction Surface Treatments (HFST) are pavement treatments that use bauxite and epoxy binder to provide long-lasting and skid-resistant properties to the roadway.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2016-05-01
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The RSDP Toolbox is designed for anyone in search of a safety data or analysis tool to support data-driven decision making. We’ve distilled hundreds of guides, databases, and software tools into a one-stop shop specifically designed to help you leverage your peers’ knowledge to improve your safety data and analysis efforts, make better investment d
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This report provides insight into how existing vehicle sensor data (e.g., location, heading, road surface and atmospheric conditions) can be utilized by the CVI environment to support transportation safety through road-weather applications. Of special interest are those road-weather infrastructure applications that compile relevant information for
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This memorandum is intended to revise the August 22, 2013, memorandum announcing Programmatic Agreements (PAs) for Processing Interstate Access Requests. Section 1405 of the Fixing America’s Surface Transportation Act (FAST Act) amends section 111(e) of title 23, United States Code (U.S.C.), by adding new freeway-to-crossroad (service) interchanges
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This report explores similarities and differences in the approach to bicycle network planning and facility design in the Netherlands and the United States. A very brief historical overview is provided as context for a discussion about bicycle planning and design approaches and physical infrastructure “on the ground,” as observed during a visit to t
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The purpose of the Highway Safety Improvement Program (HSIP) implementation guidance is to support implementation of the HSIP and Safety Performance Management Measures (Safety PM) Final Rules following changes Congress made to the program in the Moving Ahead for Progress in the 21st Century Act (MAP-21) and the Fixing America's Surface Transportat
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This safety management plan identifies preliminary safety hazards associated with the New York City Connected Vehicle Pilot Deployment project. Each of the hazards is rated, and a plan for managing the risks through detailed design and deployment is outlined. The hazards are classified as to whether they apply to one of the individual safety applic
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United States. Federal Highway Administration. Office of Planning, Environment, and Realty
2016-04-21
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This digest shares the latest information from a range of Federal and non-Federal sources, addressing transportation and its relationship to the human environment. Through this information exchange, FHWA hopes to foster dialogue at all levels and continue to further the state of the practice on these important topics in support of safety; infrastru
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In 2012, The Tennessee Department of Transportation (TDOT) accomplished its initial data collection for its entire roadway network, which includes all interstates, state highways, arterials, collectors, and local roads. With these data, TDOT created a horizontal curve database with approximately 40,000 miles of roadways with curves, which is housed
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This report highlights key recommendations and noteworthy practices identified at “Statewide and Metropolitan Transportation Planning Processes” Peer Exchange held on September 9-10, 2015 in Shepherdstown, West Virginia. This event was sponsored by the Transportation Planning Capacity Building (TPCB) Peer Program, which is jointly funded by the Fed
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This state of the practice review is a literature and industry review of existing vehicle trajectory datasets, vehicle trajectory collection methods, and traffic simulation model validation techniques. This report has the following four sections and presents the current state of the practice, as well as advances and knowledge gaps in trajectory val
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