Inverted pavement systems are used to optimize material consumption and provide long-term performance benefits. The Louisiana Department of Transportation and Development has successfully adopted inverted pavement systems with demonstrated cost savings and environmental benefits.
The purpose of the Countermeasure Service Life Guide is to provide transportation practitioners with the necessary information to make consistent, data-driven decisions for evaluating and prioritizing safety countermeasures using prescribed countermeasure service lives. The target audience includes transportation professionals implementing safety s
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This document is a technical summary of the Federal Highway Administration report Developing Crash Modification Factors for Adaptive Signal Control Technologies (FHWA-HRT-20-072) (Avelar et al. 2021).
The monthly webinar series serves as a collective experience with the goal of sharing more about the adoption of various NDE technologies by State departments of transportation (DOTs), and current projects, challenges, and best practices.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2021-03-01
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Urban Congestion Report (UCR)
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The Urban Congestion Report (UCR) is produced on a quarterly basis and characterizes the most recent traffic congestion and reliability trends at the national and city level. Each quarterly UCR compares data from the most recent three months to the same three months in the previous year.
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-03-01
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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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Concrete bridge deck overlays have been used in the United States since 1960 to extend the service life of deteriorated concrete bridge decks and improve reliability. Concrete bridge decks with overlays suffer various types of deterioration, so it is necessary to identify and assess the effectiveness of different nondestructive evaluation (NDE) tec
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The United States Department of Transportation is interested in developing individual and consolidated technologies that share safety information between road vehicles, trains, infrastructure, and mobile devices using multiple communications media. The Vehicle-to-Everything (V2X) Hub project was initiated to build a software platform to act as a ne
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Environmental Product Declarations (EPDs) are developed by the producers of construction materials as tools that communicate the environmental impacts of material production. In recent years, State Departments of Transportation (DOTs), as well as other State and local government agencies, have expressed interest in using EPDs. This document is an e
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2021-03-01
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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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The Indiana Department of Transportation (INDOT) has adopted Superpave5 as a standard specification on pavement construction projects. Superpave5 is an asphalt mix-design method that targets 5 percent air voids during laboratory design and field placement. Starting in 2013, INDOT demonstrated that layers containing the Superpave5 mixes are construc
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A successful and proactive preservation scheme (featuring the combined use of SMA, OGFC, and micro-milling) has proven itself as a cost-effective pavement strategy for the Georgia DOT in providing safety and longevity on many of its interstate roadways.
This document is one in a series of technical summaries that accompany the forthcoming Federal Highway Administration report Collection of Data with Unmanned Aerial Systems (UAS) for Bridge Inspection and Construction Inspection.
The purpose of this report is to document a simulation-based case study investigating the effectiveness of SAE J3016 Level 1 automation technology for mitigating or solving existing transportation problems related to congestion, fuel consumption, and emissions.(1) This case study examined the impacts of cooperative adaptive cruise control (CACC) ve
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2021-03-01
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PDF
This white paper outlines, in simple terms, the fundamental concepts associated with the RSI framework. The document leads the reader through the basic process of RSI application and uses simple examples to illustrate how the RSI framework can be used to support investment decisions. Additional references are provided to help implement these concep
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This Tech Brief describes the application, design, and construction aspects of Precast Concrete Panel (PCP) Roundabouts for rapid rehabilitation of existing distressed asphalt and jointed concrete roundabouts.
The National Performance Management Measures; Assessing Pavement Condition for the National Highway Performance Program provided in Subpart C of 23 CFR Part 490 includes an alternative method to report pavement conditions for Interstate and non-Interstate National Highway System locations where the speed limit is less than 40 mph.(1) This alternate
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