The use of Geographic Information Systems (GIS) to assist with the development of planning documents is well known and practiced. This research effort investigated the use of GIS for safety and traffic assessments, current and best practices, for use in the Federal lands and rural areas. This research report documents the research process, findings
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Roadway lane-reduction transitions have long been reported to be problematic for drivers. Whether this problem is the result of a lack of understanding of lane-reduction signing or lane markings, a simple failure to comply with such markings, or other unidentified factors is unknown. This study, completed in 2019, explored driver behavior when expo
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2022-12-01
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Urban Congestion Report (UCR)
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PDF
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.
The gap distances used on adaptive cruise control (ACC) and cooperative adaptive cruise control (CACC) systems have important implications for both driver safety and transportation operations The current study sought to identify comfortable or preferred following gaps under a variety of speeds that could be used to help guide set speeds for ACC and
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The purpose of this document is to ensure consistent and efficient management of State Planning and Research, Subpart B (SPR-B) work programs by Federal Highway Administration (FHWA) division offices. It is intended to serve as a resource for FHWA division staff, illustrating how reviews of the research management processes can be flexible and open
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This Guide provides bridge engineers and owners with general information and typical details to help standardize orthotropic steel deck (OSD) bridge design/fabrication to make it more competitive. This document does not intend to set a national standard but to help inform the effort through reduced parametric variations. OSD bridges can be either c
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Federal regulations in 23 CFR Part 630 Subpart J require States 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 approach to make WZPRs
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United States. Department of Transportation. Federal Highway Administration
2022-12-01
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PDF
This edition of the Traffic Monitoring Guide (TMG) is intended to provide the most up-to-date guidance to State highway agencies about the policies, standards, procedures, reporting, and equipment utilized in a traffic monitoring program. The TMG presents recommendations that help improve and advance current programs with a view toward the future o
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United States. Department of Transportation. Federal Highway Administration
2022-12-01
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PDF
The study documents the state of the knowledge of e-Ticketing through questionnaires, interviews, and case studies, and discusses the overall practice of e-Ticketing, benefits and costs, readiness factors, implementation challenges, and future plans of State highway agencies. The study also documents the piloting experiences of nine State highway a
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2022-12-01
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PDF
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
2022-12-01
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PDF
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. Recognizing the importance of in-place density in building cost-effective asphalt pavements, FHWA initiated a three-phase
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For the SR 14 and Dog Mountain Congestion and Safety Study, the Federal Highway Administration (FHWA) partnered with the United States Forest Service (USFS) and the Washington State Department of Transportation (WSDOT) (together, the "project partners") to study conges on and safety in two parts: (1) recreation access sites along an 80-mile stretc
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United States. Federal Highway Administration. Center for Accelerating Innovation
2022-12-01
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Innovator
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PDF
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. Department of Transportation. Federal Highway Administration
2022-12-01
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PDF
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
2022-12-01
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PDF
The Minnesota Department of Transportation (MnDOT) is continuing to explore further adjustments to the use of and applications for the Paver-Mounted Thermal Profiler (PMTP), a tool that has been fully deployed into practice for MnDOT asphalt paving projects since 2018. The agency had studied the tool for several years and saw the PMTP’s benefits in
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United States. Department of Transportation. Federal Highway Administration
2022-12-01
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Realty Digest
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PDF
The Federal Highway Administration's (FHWA) Office of Real Estate Services Newsletter is a resource which is intended to provide right-of-way professionals with the latest best practices, research results, training information, and information on policy and regulatory updates to ensure that Federal, State and local right-of-way program delivery is
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The Wyoming Department of Transportation’s (WYDOT) Connected Vehicle (CV) Pilot Deployment Program is intended to develop a suite of applications that utilize vehicle to infrastructure (V2I) and vehicle to vehicle (V2V) communication technology to reduce the impact of adverse weather on truck travel in the I-80 corridor. These applications support
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This document is the System Architecture Document (SAD) for the University of Washington’s (UW) Transportation Data Equity Initiative (TDEI) Project for the United States Department of Transportation’s (USDOT) ITS4US Program. The SAD describes the system architecture from various architecture perspectives including: Enterprise Architecture View; Ph
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United States. Federal Highway Administration. Office of Bridges and Structures
2022-11-29
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ZIP
HY-8 automates culvert hydraulic computations utilizing a number of essential features that make culvert analysis and design easier. An HY-8 User Manual is included with the software installation (access via 'Help' button on top toolbar) to provide important information on the technical features, capabilities, and limitations of the software.Bugs a
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United States. Department of Transportation. Federal Highway Administration
2022-11-29
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PDF
Emerging planning methods can help agencies navigate today’s deeply uncertain conditions and better position them for tomorrow’s opportunities. Recently developed methods and analytic tools (known collectively as Decision Making under Deep Uncertainty— DMDU) can help transportation planners identify and evaluate such strategies.
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