The Federal Highway Administration (FHWA) organized38 States for the FHWA Evaluation of Low-Cost SafetyImprovements Pooled Fund Study as part of its strategichighway safety plan support effort. The purpose of thestudy is to evaluate the safety effectiveness of severallow-cost safety improvement strategies through scientificallyrigorous crash-based
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The principal objective of this project, “Connected Vehicle Impacts on Transportation Planning,” is to comprehensively assess how connected vehicles should be considered across the range of transportation planning processes and products developed by States, Metropolitan Planning Organizations (MPO), and local agencies throughout the country. This r
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Federal-aid highway projects that require a traffic noise analysis must use the latest version of the Federal Highway Administration Traffic Noise Model (FHWA TNM), according to 23 CFR 772.9(a). While the FHWA TNM provides for the accurate prediction of traffic noise levels along the wayside of a highway, accurate results are not necessarily guaran
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An important aspect of the structural analysis process is the selection of the mathematical model and associated analysis method. Few absolute guidelines are available for the selection of an analysis method. The number of permutations resulting from various combinations of complicating physical features and mathematical models is virtually boundle
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This report summarizes an initial stage investigation into current research and development of alternative modal concepts. The project goals were to gain a better understanding of novel surface transportation concepts that fall outside of the Federal Highway Administration's Exploratory Advanced Research (EAR) Program's regular technology scans; to
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On December 2-3, 2014, the Federal Highway Administration's (FHWA's) Exploratory Advanced Research Program, with support from the John A. Volpe National Transportation Systems Center, convened the 2-day workshop "Novel Modes." It was held concurrently at FHWA's Turner-Fairbank Highway Research Center in McLean, Virginia; Federal Transit Administrat
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United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center
2015-12-01
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The LTPP program will yield additional benefits as data are added to the database and as data analysis efforts—some currently planned and some yet to be identified—are completed. Continued monitoring of the test sections that remain in service is needed to obtain data encompassing their full performance period. In addition, key LTPP stakeholders re
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Intersection safety is a national, state, and local priority. Approximately 26 percent of the fatal crashes that occur in the United States are intersection or intersection-related crashes. The objective of this guide is to advance efforts to improve safety at unsignalized intersections with minor-road stop control along rural two-lane roads, by fo
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2015-12-01
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The Federal Highway Administration (FHWA) published the Highway Safety Improvement Program (HSIP) and Safety Performance Management Measures (Safety PM) Final Rules in the Federal Register on March 15, 2016, with an effective date of April 14, 2016. The HSIP Final Rule updates the HSIP regulation under 23 CFR Part 924 to be consistent with MAP-21 a
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2015-12-01
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High friction surface treatments (HFST) are an effective countermeasure for improving pavement friction to meet friction demand at curves on both asphalt and concrete surfaces. HFST can increase friction values on bridge decks far above those achieved by new asphalt or concrete, as well as extend its lifespan.
United States. Department of Transportation. Federal Highway Administration. Office of Safety
2015-12-01
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Local elected officials play a major role in local road safety. They set goals, adopt policies, build coalitions, and approve the budgets for the roads you operate. These officials, however, typically face many demands for their time and many requests for funding. When you work with them, you need to make every minute count.
The mission of the Tennessee Department of Transportation (TDOT) is to enablethe safe and efficient movement of people and goods by fostering a robust multimodal transportation system, including highways, airports, public transit, bicycle/pedestrian facilities, railroads, and navigable waterways. To further this mission, TDOT is committed to integr
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The New York State Department of Transportation (NYSDOT), in partnership with The Nature Conservancy (TNC), wrote this report in fulfillment of a grant from the Federal Highway Administration’s (FHWA) Climate Change Resilience Pilot Program. The purpose of the program was to pilot approaches to conduct climate change and extreme vulnerability asses
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2015-12-01
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On a monthly basis, each State is required to report to the Federal Highway Administration (FHWA), the amount of gallons taxed by that state. This data is analyzed and compiled by FHWA staff. The data on the amount of on-highway fuel use for each State is then used to attribute federal revenue to each State. Yearly, the FHWA, Office of Policy, prov
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About ½ of all traffic fatalities occur at night even though only about ¼ of travel occurs after dark. Retroreflective pavement markings help drivers see the road ahead at night and must be maintained to be effective. Transportation agencies need a safe, reliable and efficient way of collecting retroreflectivity data for their pavement markings.
Pollinators are critical to our food supply as well as to the health of ecosystems. Wild pollinators such as the monarch butterfly and a number of bumble bee species are in decline, and beekeepers in the United States and Europe have reported significant losses of managed European honey bee colonies. Pollinator declines are attributed to loss of ha
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Pollinators are critical to our food supply as well as to the health of ecosystems. Wild pollinators such as the monarch butterfly and a number of bumble bee species are in decline, and beekeepers in the United States and Europe have reported significant losses of managed European honey bee colonies. Pollinator declines are attributed to loss of ha
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Corrosion is a serious threat to the long-term function and integrity of a steel bridge. Structural steel will corrode if left unprotected or inadequately protected from the natural environment. This corrosion can take the form of general uniform thickness loss or concentrated pitting depending on exposure to the environment and the steel design de
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This module discusses the design of bracing systems for the superstructures of straight and curved girder systems. I-girder and box shaped members are covered. Bracing for other types of bridges, such as truss, arch or towers is not specifically addressed; however much of the information included in this module may be applicable. Bracing systems se
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This module presents an overview of structural steel products that are used for steel bridge construction. It is intended to serve as a reference and educational tool for structural engineers involved with bridge design and evaluation. The primary focus is on steel plate and rolled shape products that are available under the ASTM A709 Specification
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