United States. Department of Transportation. Federal Highway Administration. Office of Operations
2019-12-01
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Unforeseen needs often arise during the construction phase of a project. These needs may result in expensive and time-intensive change orders. By developing a safety contingency line item as part of the project estimate phase, TxDOT can address and mitigate numerous challenges during active operations. As a result, the State has seen a significant
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2019-12-01
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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 Safety
2019-12-01
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Analysis of statewide crash data often shows a significant portion of fatalities and serious injuries occurring on locally owned roadways. To achieve the long-term goal and vision of zero fatalities on our nation’s roadways, States should consider safety improvements on the local system. States use local road safety programs to supplement State roa
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2019-12-01
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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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Seven years ago, the Alaska Transportation Working Group published its first-ever long-range transportation plan for Federal lands in Alaska, the 2012 Alaska Federal Lands Long Range Transportation Plan (LRTP). This plan was a collaboration between a wide range of partners – the Bureau of Land Management, National Park Service, U.S. Fish and Wildli
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Five portland cement concrete (PCC) and five asphalt concrete (AC) pavement locations at each of seven field testing sites in the central and eastern United States represented a range of aggregate types, pavement surface ages, and climates. Albedo, thermal properties, and pavement surface characteristics data were collected, and cores were obtained
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This document is intended to provide decision makers with an objective appraisal of the physical conditions, operational performance, and financing mechanisms of highways, bridges, and transit systems based on both their current state and their projected future state under a set of alternative future investment scenarios. It consolidates conditions
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TRX developed a NEON® Smart Wayfinding and Navigation (SWaN) service that delivers the underlying location and routing capabilities required to allow application developers to provide travelers with real-time location and en-route assistance and situational awareness, including within complex urban transport structures. These core indoor location a
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United States. Federal Highway Administration. Office of Planning, Environment, and Realty
2019-11-14
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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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Black Hawk County Metropolitan Area in Northeast Iowa has a population of 123,521, along with an extensive regional trail network with upwards of 115 miles of trails and more planned for construction. However, the trail system was hard to navigate, and thus not being fully used by visitors and residents. Local communities and the region's associati
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This paper explores the public’s outlook on automated vehicles, focusing specifically on attitudes regarding safety, trust, and willingness to try, as well as the factors that influence those opinions. It compiles the results of numerous surveys and studies conducted over the past four years and tracks consumer attitudes over time, against the back
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The Federal Highway Administration's Long-Term Pavement Performance (LTPP) program issues a triannual newsletter to inform you about the progress and activities of the program. Brief updates on progress in important program activities are provided, including data collection, data releases, new products and publications, pooled fund studies, and dat
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Researchers at California Partners for Advanced Transportation Technology (PATH), a research and development program at the University of California-Berkeley, studied the potential benefits of cooperative adaptive cruise control (CACC) by deploying the technology in a platoon of three trucks. They built the CACC system and implemented it in three l
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The Federal Highway Administration (FHWA) organized 40 States to participate in the FHWA Evaluation of Low-Cost Safety Improvements Pooled Fund Study as part of its strategic highway safety plan support effort. The purpose of the study was to evaluate the safety effectiveness of low-cost safety improvement strategies through scientifically rigorous
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The GIS in Transportation team publishes quarterly newsletters to share information about significant geospatial transportation news, events, and applications. Each issue highlights a specific transportation agency's application of GIS or geospatial data and technology.
United States. Department of Transportation. Federal Highway Administration. Western Federal Lands Highway Division
2019-11-01
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Federal Lands Highway
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The Cascade Lakes Highway is located in Central Oregon, southwest of Bend (Figure 1: Map of Study Area). The highway is within the Deschutes National Forest and provides access to many recreation sites in the Forest. The highway’s underlying ownership is USFS, but is maintained by Deschutes County. Deschutes County has become a major tourist and re
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Three phases typically occur in the development of a concrete mixture: specifying, designing, and proportioning. Specifying refers to the requirements contained in the contract documents with regards to performance requirements for the fresh and hardened concrete. Mixture design is the process of selecting mixture characteristics for the intended u
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This Tech Brief focuses specifically on approaches commonly used for curing cast-in-place concrete pavements. The most common method is the application of membrane-forming curing compounds, although fogging, plastic sheets, wetted materials, and insulated blankets may also be used depending on the type of project and the ambient conditions during a
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Accelerated bridge construction (ABC) is a technique in which large bridge elements are fabricated offsite or next to the site and are then connected onsite to complete the bridge. One such ABC method is the use of full depth precast (PC) concrete deck panels, which are placed on top of steel girders connected via shear studs. The PC concrete deck
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