This technote provides an overview of the Long-Term Pavement Performance (LTPP) Analysis-Ready datasets. The goal of the Long-Term Pavement Performance (LTPP) program is “to increase pavement life by the investigation of long-term performance. . . .” (FHWA 2015). One of the six objectives identified to support this goal was the establishment of a n
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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FHWA R&T Now
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A newsletter about research, development, and technology (RD&T) at the U.S. Department of Transportation’s (USDOT) Federal Highway Administration (FHWA).
United States. Department of Transportation. Federal Highway Administration
2024-07-01
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PDF
Data is a crucial asset for the Iowa Department of Transportation (Iowa DOT), and the agency recognizes the need for a comprehensive data management strategy to facilitate a seamless exchange of information through digital as-builts (DABs) as it transitions to digital workflows. The agency’s current process for creating DABs involves redlining PDFs
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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PDF
The Arkansas Department of Transportation (ARDOT) organized their 2022–2027 Strategic Highway Safety Plan (SHSP) into four emphasis areas in alignment with the Safe System Elements (Safe Road Users, Safe Vehicles, PostCrash Care, and Safe Roads and Safe Speeds combined) to support their long-term goal of zero fatalities and serious injuries.
This document is a technical summary of the Purdue University report, Measurement of Post-Tensioning Tendon Force Using Optical Fiber Technology, available at https://rosap.ntl.bts.gov/view/dot/75679. This report is a deliverable from a research study sponsored by the Federal Highway Administration (FHWA). The FHWA is the source of all figures and
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Changeable message sign (CMS) messaging is an important tool for distributing traveler information to drivers. Careful CMS message selection can help drivers make informed travel decisions and increase the safety and usability of roadways—particularly during nonrecurring events. The current approach is designed to help CMS operators construct CMS m
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Adaptive route optimization (ARO) is a method of dynamically and effectively routing winter maintenance vehicles across all segments of a road network to meet an agency’s maintenance goals, subject to real-time disruptions from atmospheric and road weather conditions, traffic congestion, incidents, work zones, and resource constraints. ARO could en
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Complex freeway interchanges are difficult to navigate in many cases. Poorly designed signs at such locations, along with contributing roadway and traffic factors, frequently lead to increased crash risks. A sign design issue typically seen on urban freeways is the use of complex guide signs. The 2009 Manual on Uniform Traffic Control Devices sets
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Speed is widely recognized as having significant safety impacts, especially on the severity of crashes. However, these effects are complex and generally have not been captured in the Highway Safety Manual (HSM) (American Association of State Highway and Transportation Officials (AASHTO) 2010). The current Federal Highway Administration (FHWA) proje
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Speed is widely recognized as having significant safety impacts, especially on the severity of crashes. However, these effects are complex and generally have not been captured in the Highway Safety Manual (HSM) (American Association of State Highway and Transportation Officials 2010). The current Federal Highway Administration (FHWA) project develo
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This report summarizes the before and after operational performance of intersection modifications that have been converted from traditional intersections to alternative configurations. These changes are largely based on reconfiguration of left turns or U-turns. The studied locations were from Arizona, Minnesota, Texas, and Virginia.
Rural intersections account for 30 percent of all crashes in rural areas and 6 percent of fatal crashes, representing a significant but poorly understood safety problem (Zwerling et al. 2005). The objective of this study was to use second Strategic Highway Research Program Naturalistic Driving Study data and Roadway Information Database data to obs
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This report describes Federal Highway Administration research efforts to develop mechanistic-based performance testing and analysis tools for the purpose of understanding fundamental pavement performance and easing deployment of performance tests and associated analysis and evaluation tools to understand long-term performance.
The Highway Safety Information System (HSIS) is composed of seven States and one urban center. The HSIS Program provides linked crash, roadway, and traffic volume data. This guidebook supports the use of Washington State HSIS data from 2018 and beyond. Data and documentation recorded before 2018 (1993–2017) are available upon request to the virtual
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2024-07-01
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National Travel Time Dashboard: Interstate Highways
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The Monthly Urban Congestion Report (UCR) provides a state-level overview of traffic congestion and reliability trends on Interstate highways. Published every month, the report compares data from the most recent month with the same month in the previous year. It uses travel time data from the Federal Highway Administration’s National Performance Ma
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2024-06-26
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Special Issue - Weekly Motor Fuel Report
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The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2024-06-20
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Special Issue - Weekly Motor Fuel Report
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PDF
The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2024-06-12
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Special Issue - Weekly Motor Fuel Report
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PDF
The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2024-06-05
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Special Issue - Weekly Motor Fuel Report
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PDF
The Gasoline Product Supplied report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Administration
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