United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2017-09-01
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Public Roads
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PDF
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 Research, Development, and Technology
2017-09-01
|
Public Roads
|
PDF
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
...
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2017-09-01
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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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Learning in Progress, NHI's quarterly newsletter, provides updates on new course launches, upcoming Web conference seminars, training programs and events, and NHI policy changes.
Commonly known as Longitudinal Channelizing Devices (LCD), these units are used to delineate or channelize vehicles and pedestrians. LCDs help address work zone safety by preventing pedestrians and vehicles from entering work areas. Use of LCDs is beneficial at major decision points such as lane closures, exit ramps, driveways, and crossovers. Thes
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Automated Flagger Assistance Devices (AFADs) are remotely operated temporary traffic control equipment with high visibility signage, 12 inch red signal heads, and automated flags. These devices are intended to direct and control traffic using only one person. In a typical flagging operation, flaggers are located at each end of the lane closure and
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Automated Speed Enforcement (ASE) systems, consisting of traffic enforcement cameras, photo enforcement programs, or speed cameras, are used to more strictly enforce speed limits in work zones. ASE systems help improve work zone safety by identifying drivers who exceed the posted speed limit by a certain amount, who are then issued citations. Use o
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An Internal Traffic Control Plan (ITCP) is a tool that project managers can use to coordinate and control the movement of workers, construction vehicles, and equipment in the activity area and to inform all parties operating within the activity area on the locations of others. The activity area is the section of the highway where the work activity
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Mobile barrier systems are integrated, rigid-wall, semi-trailers that are used in conjunction with standard semi-tractors to provide improved mobile and safe work environments for personnel at applicable construction sites. They serve as extended, mobile, longitudinal barriers that provide a physical and visual wall between passing traffic and main
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The Minnesota Department of Transportation initiated an independent study to learn more about best practices for reporting and documenting vehicle intrusions into the work space of a work zone, including "near misses" that do not result in crashes. The purpose of the study was to determine what data other States collect about vehicle intrusions and
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This document presents a parametric study that demonstrates the broad applicability of the soil nail wall load and resistance factor design (LRFD) and analysis procedure that is detailed in Geotechnical Engineering Circular No. 7 (GEC 7), Soil Nail Walls Reference Manual (FHWA-NHI-14-007), to various soil nail wall design heights, soil parameters,
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This document is a technical summary of the Federal Highway Administration (FHWA) report "Safety Evaluation of Cable Median Barriers in Combination with Rumble Strips on the Inside Shoulder of Divided Roads" (FHWA-HRT-17-070).
This is a revised version of the following report: Pavement Performance Measures and Forecasting and the Effects of Maintenance and Rehabilitation Strategy on Treatment Effectiveness (FHWA-HRT-16-047), available at https://www.fhwa.dot.gov/publications/research/infrastructure/pavements/ltpp/16047/index.cfm.New and innovative pavement performance me
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This report provides a brief background on Geosynthetic Reinforced Soil Integrated Bridge System (GRS-IBS) which is a method of bridge support. The purpose of the report is to highlight the range of the structure types, sites and materials that have been used in deployment of GRS-IBS from 2011 to 2017.
The purpose of this study is to identify and describe options for improving the use, condition, and performance of freight intermodal connectors through the provision of better data for planning and programming. This study describes issues related to the designation of freight intermodal connectors, examined data needs and options for a long-term d
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