Understanding how freight moves now and predicting how it might flow in the future are essential to transportation planning that meets the need for efficient, safe, and economical freight movement. The Federal Highway Administration (FHWA) Exploratory Advanced Research (EAR) Program is supporting freight transportation research that will develop to
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This field guide provides a series of checklists and steps for the proper development, planning, preparation, and execution of a noise measurement effort for many of the measurement methodologies in the FHWA Noise Measurement Handbook. Each chapter is intended to be a standalone set of pages to aid the person(s) conducting noise or vibration measur
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This report presents corrosion study findings related to corrosion resistance of eight types of metallic dowel bars. The accelerated laboratory corrosion testing was performed using seven small-scale concrete slabs that simulated typical concrete pavements for 452 d of a modified Southern Exposure followed by a detailed autopsy of the extracted bar
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2018-06-01
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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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This research study devised two scenarios for application of multi-objective optimization to enhance calibration of performance models in the American Association of State Highway and Transportation Officials (AASHTO) AASHTOWare® Pavement ME Design software.(1) In the primary scenario, mean and standard deviation of prediction error are simultaneou
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This report reviews and highlights key content and outcomes of the Greater Texas Multi-Jurisdictional Coordination Workshop held on March 28-29, 2018 in Houston, Texas. The event was sponsored by the Federal Highway Administration’s (FHWA) Office of Planning, Environment, & Realty (HEP) to examine shared regional issues of mutual concern to FHWA an
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This report reviews and highlights key content and outcomes identified at the Multi-Jurisdictional Coordination for the Great Lakes Region Workshop held on February 22–23, 2018 in Columbus, Ohio. The event was sponsored by the Federal Highway Administration’s (FHWA) Office of Planning, Environment, & Realty (HEP) to examine shared regional issues o
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2018-06-01
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PDF
A typical Road Diet converts an existing four-lane, undivided roadway to two through lanes and a center, two-way left turn lane. This design allows left-turning drivers to exit the traffic stream while waiting for a gap to complete their turn and frees up space that can be reallocated to other uses.
United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2018-06-01
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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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As part of the Federal Highway Administration’s (FHWA) Research and Technology Program evaluation, this report documents the findings of a summative evaluation of various adaptive signal control technology (ASCT) research and outreach activities conducted by FHWA over the course of more than 20 yr. The evaluation considers the ways in which FHWA’s
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National Performance Measures for Congestion, Reliability, and Freight, and CMAQ Traffic Congestion: General Guidance and Step-by-Step Metric Calculation Procedures presents recommended steps for calculating the National Highway System performance metrics (23 CFR 490.511), the Truck Travel Time Reliability metrics (23 CFR 490.611), and the Peak Hou
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This report presents study findings related to corrosion resistance of 12 types of metallic reinforcing steel bars. The accelerated laboratory corrosion testing was performed using eight large-scale concrete slabs that simulated typical reinforced concrete bridge decks for about 18 mo by an accelerated corrosion testing protocol followed by a detai
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This manual outlines the state of the art and recommended practice for designing and constructing geosynthetic reinforced soil (GRS) technology for the application of abutments and the Integrated Bridge System (IBS). It was developed to provide engineers with the necessary background knowledge of GRS technology and its fundamental characteristics a
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This report summarizes noteworthy practices and key recommendations shared during a scenario planning workshop, hosted by the Wichita Area Metropolitan Planning Organization, on June 26-27, 2018, in Wichita, Kansas. The Federal Highway Administration (FHWA) sponsored this event as part of its Scenario Planning Program and in connection with the Tra
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
2018-06-01
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PDF
A pedestrian refuge island is a median with a refuge area that is intended to help protect pedestrians who are crossing a multilane road. This countermeasure is sometimes referred to as a crossing island, refuge island, or pedestrian island. The presence of a pedestrian refuge island at a midblock location or intersection allows pedestrians to focu
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This report presents the user guide for the Long-Term Pavement Performance (LTPP) Climate Tool. The climate data in the LTPP Climate Tool have been extracted from the National Aeronautics and Space Administration Modern-Era Retrospective Analysis for Research and Applications (MERRA) database. The LTPP Climate Tool was developed to provide convenie
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2018-06-01
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PDF
The Federal Highway Administration (FHWA) Weigh-In-Motion (WIM) Pocket Guide consists of three main text documents, four instructional video supplements, and six appendices. The video supplements and appendices are only available on the FHWA website: https://www.fhwa.dot.gov/policyinformation/knowledgecenter. Part 1 includes a description of each e
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2018-06-01
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PDF
The Federal Highway Administration (FHWA) Weigh-In-Motion (WIM) Pocket Guide consists of three main text documents, four instructional video supplements, and six appendices. The video supplements and appendices are only available on the FHWA website: https://www.fhwa.dot.gov/policyinformation/knowledgecenter. Part 1 of the Guide includes a descript
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Every Day Counts (EDC) is a Federal Highway Administration 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 roadway s
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This design example, concrete pier cap strengthening, involves the addition of external post-tensioning bars to a concrete pier cap. The bridge is to be strengthened to carry HL-93 design live load. The existing bridge was designed for H-15 live load, and the previous widening was designed for HS-15 live load. This example is based on AASHTO LRFD B
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