The Smart Travel Concierge System includes a web-based Smart Travel Learning Curriculum designed to be used by individuals with cognitive disabilities and other users to engage in self-paced multimedia training on common public transit travel skills and knowledge. This document provides an overview of the process used to create the Learning Curricu
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The purpose of this document is to report on pre-deployment conditions (pre-Phase 3), to report data being collected for the Performance Measurement and Evaluation and to establish parameters that will be reported to the USDOT monthly. This report and its subsequent updates will serve as the progress updates for data collection and for basic output
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The Traffic Optimization for Signalized Corridors (TOSCo) system consists of a series of innovative applications designed to optimize traffic flow and minimize vehicle emissions on signalized arterial roadways. The TOSCo system applies both infrastructure- and vehicle-based V2X communications to assess the state of vehicle queues and cooperatively
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United States. Federal Highway Administration. Office of Planning, Environment, and Realty
2019-06-13
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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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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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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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There is growing concern about driving under the influence of cannabis (DUIC), especially as more states consider changing laws to legalize cannabis. A key question regarding the legalization of cannabis for recreational or medical purposes is its potential impact on public health issues such as traffic safety. To address the needs of traffic safet
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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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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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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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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2019-06-01
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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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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 Highway Policy Information
2019-06-01
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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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Successes in Stewardship is a Federal Highway Administration (FHWA) bimonthly newsletter highlighting current best practices in stewardship and environmental review from around the country.
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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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. Federal Highway Administration. Office of Asset Management, Pavements and Construction
2019-06-01
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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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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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Automated vehicles are being developed and promoted by manufacturers. Like other vehicles, they will have to perform in a variety of adverse weather conditions. With recent advancements in automated vehicle (AV) technology, the Federal Highway Administration is exploring AV needs, opportunities, and potential shortcomings during adverse weather con
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