The use of stainless steel as concrete reinforcement has continued to gain momentum in highway construction. The main reason behind stainless steel’s popularity is its inherent corrosion resistance. However, stress corrosion cracking (SCC), normally associated with austenitic stainless steel at a high temperature (>100 ℃ (212 ℉)), can occur at a ra
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United States. Department of Transportation. Federal Highway Administration
2024-09-01
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This fact sheet highlights an overview of the Annual Performance Expenditure Report (APER), that is required of each State Department of Transportation (DOT). It is to be submitted to the local Federal Highway Administration (FHWA) division office, per 23 Code of Federal Regulations (CFR). An APER assists both the State DOTs and FHWA division offic
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United States. Department of Transportation. Federal Highway Administration
2024-09-01
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Welcome to the Transportation Pooled Fund (TPF) Quarterly Update. This update shares the latest information on the TPF Program including highlights, resources, announcements, open solicitations, and active studies. The TPF program creates an opportunity for partners to pool their funds, subject matter expertise, and resources to conduct high-priori
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This summary report explains corrosion control methods, including using flexible fillers such as petroleum-based microcrystalline wax to replace cementitious grout—an impregnation method using a silicon polymer-based corrosion inhibitor that impregnates the grout to form a barrier to moisture and oxygen upon a pressure-driven injection process—and
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United States. Department of Transportation. Federal Highway Administration
2024-09-01
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Safety Compass Newsletter
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The Federal Highway Administration’s (FHWA) Safety Compass newsletter aims to increase highway safety awareness and to provide resources to the highway safety community to help save lives. The newsletter is published three times a year, and includes articles on safety-focused offerings from FHWA, other DOT modes; our State, Local, and Tribal partne
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To ensure public safety and to protect the capital investment in bridges over water, underwater members should be inspected to the extent necessary to determine their structural condition with certainty. Underwater inspections should also include the streambed. In shallow water, underwater inspections may be accomplished visually or tactilely from
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This case study technical report presents three examples of regionally coordinated transportation systems management and operations (TSMO) programs that highlight how the integration of traffic management systems (TMSs) and organizational coordination across participating transportation agencies may lead to increased effectiveness and optimization
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United States. Department of Transportation. Federal Highway Administration
2024-09-01
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The systemic approach to safety prioritizes reducing systemic risk to produce a reduction in fatal and serious injury crashes. Given that high speed contributes to the likelihood of a severe crash outcome, a systemic program to reduce traffic speed is expected to reduce severe crash frequency. In this vein, the City of Pittsburgh’s Department of Mo
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The overall objective of this research phase is to develop a possible stochastic methodology for quantifying the probability of bridge failure against heavy truck collisions which can result in fires and that can impact the safety of bridges. In 2021, the National Bridge Inventory (NBI) had over 618,456 bridges and culverts registered in its U.S. b
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This report summarizes work performed under TPF-5(299) towards developing standardized procedure for consistent measurement and analysis of faulting data within a pavement section, between different pavement sections, and between different state highway agencies (SHAs). The work was performed in two Phases. In Phase I, the research team proposed a
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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 North Carolina HSIS data from 2018 and beyond. Data and documentation recorded before 2018 (1990–2017) are available upon request to the virtual H
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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 Maine HSIS data from 2018 and beyond. Data and documentation recorded before 2018 (1985 –2017) are available upon request to the virtual HSIS Labo
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This report documents the results and technical performance analysis of the Pilot 1 test for the FHWA Virtual Open Innovation Collaborative Environment for Safety (VOICES) project. Pilot 1 furthered the development of tools and software used for distributed testing and added new test partners to the distributed testing community. This test expanded
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The Federal Highway Administration (FHWA) within the U.S. Department of Transportation has been using its cooperative driving automation (CDA) program to lead research, development, and standardization that demonstrate CDA technologies’ benefits and accelerate industry adoption and deployment. The FHWA and the Intelligent Transportation System Join
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This TechBrief summarizes the system dynamics aspects from the report, which was prepared for the Flooded Pavement Assessment project funded through FHWA Project No. DTFH61-13-C-00022. The report, in general, addresses the load-carrying capacity of pavements affected by flooding to provide decisionmakers with quantitative tools to rationally assess
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The Moving Ahead for Progress in the 21st Century Act (MAP-21), the Fixing America’s Surface Transportation Act, and other current legislation promote the use of performance-based decisions to manage the Nation’s highway system (U.S. Congress 2012, 2015). MAP-21 identified seven national goal areas and established requirements for national performa
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2024-09-01
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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 Operations
2024-09-01
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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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The purpose of this Primer is to apply an evaluation methodology previously developed by the Federal Highway Administration to six real-world case studies, and to provide examples for successful application of the methodology and highlight relationships to third performance management rulemaking measures. The methodology uses empirical data to trac
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2024-08-28
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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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