The 202 South Mountain freeway is a 22-mile, 8-lane freeway that completes the Loop 202 and Loop 101 freeway system in the southwestern quadrant of the Phoenix metropolitan area. The largest single project in Arizona history, Loop 202 provides important connections and alleviates traffic congestion in downtown Phoenix. This project was enabled by M
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HFST is a safety countermeasure intended to restore and maintain pavement friction in wet and dry conditions to reduce crashes. This treatment is especially effective where there is a history of wet-pavement crashes. In Pennsylvania, over 50% of the fatal and serious injury crashes involve a lane departure, and intersection crashes account for 21%
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HFST is a safety countermeasure intended to restore and maintain pavement friction in wet and dry conditions to reduce crashes and is especially effective where there is a history of wet-pavement crashes. While investigating lane departure crashes (RwD), the South Dakota Department of Transportation (SDDOT) found RwD crashes were five times more li
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The Federal Highway Administration (FHWA) partnered with eleven pilot project teams to assess and deploy resilience solutions. This case study is part of a series that summarizes the pilot projects and highlights transportation system resilience efforts at other agencies across the country. For more information, visit https://www.fhwa.dot.gov/envir
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The City of Portland used $1.2 million of Transportation System Development Charges (TSDC) to rebuild a portion of NE Cully Blvd. with significant safety improvements, including new sidewalks, cycle tracks, and planting strips for pedestrian and bicycle safety. Estimating the impacts of development on infrastructure costs based on person trips, rat
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In 2008 the Hillsboro City Council established a Transportation Utility Fee (TUF)—a monthly fee charged to property owners to support citywide investments in pavement condition and bicycle and pedestrian facilities. The city collects TUF fees from all residential, business, government agency, school, and nonprofit property owners through regular ci
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Atlanta’s 5th Street is a central thoroughfare in the Midtown District adjacent to the campus of the Georgia Institute of Technology. Community and business leaders have identified multimodal infrastructure improvements as a top priority for the district’s continued livability and economic vitality. In 2016, Atlanta voters approved a proposal to fu
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A private developer purchased a property to build a rail-served industrial park with specialized grain-handling facilities, supporting regional economic development goals, but the site lacked the necessary highway access. A partnership between a county government and a private developer allowed the county to receive a low-interest loan through the
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United States. Department of Transportation. Federal Highway Administration
2021-01-01
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PEL is a valuable tool for creating efficiencies in the transportation project development process that supports agencies’ efforts to accelerate project delivery. PEL represents a collaborative and integrated approach to transportation decision-making that considers benefits and impacts of proposed transportation system improvements to the environm
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The Transportation Pooled Fund (TPF) Program has existed for more than 20 years and has enabled public and private entities to combine resources to conduct high-priority research on a wide variety of shared, highway-related problems. By pooling funds and expertise, participants develop innovative solutions at less cost while extending the reach and
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United States. Federal Highway Administration. Center for Accelerating Innovation
2021-01-01
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Innovator, published by the FHWA Center for Accelerating Innovation, advances implementation of innovative technologies and processes in the highway industry. Its audience is transportation professionals in highway agencies, trade and research groups, academia and the private sector, and the driving public.
This document describes the System Requirements Specification (SyRS) for the Tampa Hillsborough Expressway Authority (THEA) Connected Vehicle (CV) Pilot Deployment. This SyRS was updated to reflect the requirements implemented in Phase 3 and describes the current system requirements derived from the user needs, Concept of Operations, Security Manag
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This report presents a succinct view of historical steel bridge design with an emphasis on the evolution of the steel itself, including a summary of American Society for Testing and Materials and American Association of State Highway Officials/American Association of State Highway and Transportation Officials steel specifications used in steel brid
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-01-01
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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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United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements
2021-01-01
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Solutions for integrating innovative overlay procedures into practices that can improve performance, lessen traffic impacts, and reduce the cost of pavement ownership. Approximately half of all infrastructure dollars are invested in pavements, and more than half of that investment is in overlays. By enhancing overlay performance, State and local hi
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United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements
2021-01-01
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Solutions for integrating innovative overlay procedures into practices that can improve performance, lessen traffic impacts, and reduce the cost of pavement ownership. Approximately half of all infrastructure dollars are invested in pavements, and more than half of that investment is in overlays. By enhancing overlay performance, State and local hi
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United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements
2021-01-01
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PDF
Solutions for integrating innovative overlay procedures into practices that can improve performance, lessen traffic impacts, and reduce the cost of pavement ownership. Approximately half of all infrastructure dollars are invested in pavements, and more than half of that investment is in overlays. By enhancing overlay performance, State and local hi
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United States. Department of Transportation. Federal Highway Administration
2021-01-01
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The Asphalt Mixture Performance Tester (AMPT) includes three tests designed to fundamentally assess your asphalt mixture’s stiffness, cracking potential, and resistance to rutting. In the dynamic modulus (DM) test, your asphalt mixture specimen is subjected to a sinusoidal compressive stress of various frequencies, measured as a function of time to
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United States. Department of Transportation. Federal Highway Administration
2021-01-01
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Although several factors can influence the performance of an asphalt pavement, one of the most important is in-place density. A small increase in density can potentially lead to a significant increase in service life of asphalt. Recognizing the importance of in-place density in building cost-effective asphalt pavements, FHWA initiated a three-phase
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