With the increasing adoption of adaptive cruise control (ACC) and development of cooperative adaptive cruise control (CACC), their effect on traffic, energy, and emissions is an ever more urgent question. Using the rapidly growing body of research on these impacts, this report presents a systematic review and meta-analysis of 67 recent studies. The
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Three experiments explored the traveler information messages most likely to result in desired changes in traveler behavior during nonrecurring events. Experiment 1 focused on pretrip traveler information needs. Event type and trip importance were found to have a greater effect on intended behavior than delivery mode. Experiments 2 and 3 evaluated t
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This document presents the system design consisting of a mobile application for use by pedestrians with disabilities to facilitate safe and efficient intersection crossing though specially equipped intersections. The mobile application is designed to allow the pedestrian to communicate directly to the equipped intersection and to actively influence
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2019-06-01
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PDF
The Pedestrian and Bike Forum newsletter provides information to FHWA stakeholders on reducing the number of pedestrian- and bicycle-related highway fatalities and serious injuries. Topics include updates on FHWA programs, spotlights on State and local noteworthy practices, initiatives with partner organizations, and upcoming events. It is publishe
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Wildlife-vehicle collisions are dangerous and costly to the traveling public and pose a threat to wildlife populations. Transportation managers continue to evaluate the effectiveness of measures that have been employed to reduce wildlife-vehicle collisions (WVCs). One potential measure is to reduce the posted speed limit at night and during dawn an
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Incidents involving pedestrians and bicyclists comprise a large proportion of traffic fatalities every year. These dangerous conflicts tend to occur more frequently under conditions in which the pedestrian is difficult to detect, such as crowded urban settings and under low visibility. The recent surge of connected vehicle technology has led to the
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In supporting State Departments of Transportation (DOTs) and metropolitan planning organizations (MPOs) in using geographic information systems, the Federal Highway Administration (FHWA) is publishing this case study report focusing on the creation and use of open data applications by transportation agencies. To gather information for this report,
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This document presents real-world examples of how State and local traffic managers and demand management professionals can work together to create a more comprehensive approach to proactively manage mobility and reliability concerns under different contexts. The document highlights the benefits of linking transportation demand management (TDM) and
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Every Day Counts (EDC) is the Federal Highway Administration’s program to advance a culture of innovation in the transportation community in partnership with public and private stakeholders. Through this State-based effort, FHWA coordinates rapid deployment of proven strategies and technologies to shorten the project delivery process, enhance roadw
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2019-06-01
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Public Roads
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Public Roads is the quarterly magazine of the Federal Highway Administration (FHWA). Reading Public Roads is the easiest way to keep up-to-date on developments in federal highway policies, programs, and research and technology. More specifically, the magazine "covers" advances and innovations in highway/traffic research and technology, critical nat
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2019-06-01
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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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Successes in Stewardship is a Federal Highway Administration (FHWA) bimonthly newsletter highlighting current best practices in stewardship and environmental review from around the country.
The Tampa Hillsborough Expressway Authority (THEA) 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 traffic congestion, improve safety, and decrease emissions. These CV applications support a fle
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The Virginia Department of Transportation (VDOT) uses probe vehicle data from different sources to measure highway system mobility performance at both the macro- and microlevels. VDOT uses delay as the key metric for macro-level performance measurement and measures both recurring and non-recurring delay at the statewide, district, and corridor leve
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2019-06-01
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PDF
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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United States. Federal Highway Administration. Office of Asset Management, Pavements and Construction
2019-06-01
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PDF
This Technical Brief provides an overview of thin asphalt overlays placed as a pavement preservation treatment. This document defines thin asphalt overlays as dense graded mixtures placed less than 1½ inches in thickness. Gap-graded and open-graded mixtures may be specifically designed for thin placement but they are considered specialty mixtures a
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Over the last several years, the Colorado Department of Transportation (CDOT) has been working to implement e-Construction and improve its partnering practices. Although CDOT has recently made some positive efforts to implement e-Construction and revitalize its Partnering Program, the agency is not where it would like to be. CDOT invited one repres
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Shrewd modifications to concrete mixtures and resourceful construction practices led to cost savings of more than 50 percent, time savings of several weeks, and significant reductions in various environmental impacts. This was demonstrated on a concrete pavement reconstruction project on Peña Boulevard, a four-lane divided highway that connects the
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2019-06-01
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PDF
In 2018, 36,560 people were killed in traffic crashes on the Nation’s roadways. In a concerted effort to reduce fatalities, most States have adopted a zero deaths vision or approach in their Strategic Highway Safety Plans (SHSPs). In addition, more than 40 communities have committed to Vision Zero, a strategy to eliminate traffic deaths and severe
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2019-06-01
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PDF
The Minnesota Department of Transportation (MnDOT), as part of the ENTERPRISE Pooled Fund Study, is implementing a Smarter Work Zone Technology Application that utilizes real-time work zone activity information to improve situational awareness for operators to monitor traffic operations and automatically create lane closure notifications for the pu
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