The Alabama Department of Transportation (ALDOT) is currently using the Alabama Design and Analysis of Pavement Thickness (ADAPT) software for their structural pavement design process, which is based on the 1993 American Association of State Highway and Transportation Officials (AASHTO) Pavement Design Guide. In 2008, the American Association of St
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The Alabama Department of Transportation (ALDOT) is advancing Balanced Mix Design (BMD) to improve the durability, reliability, and cost-effectiveness of asphalt pavements. To support implementation, a field validation project was conducted on State Route 55 in Covington County, Alabama, using six asphalt mixtures designed to meet target thresholds
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United States. Department of Transportation. Federal Highway Administration
2022-01-01
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PDF
Exploratory advanced research focuses on longer term, higher risk research with tremendous potential for transformational improvements to plan, build, renew, and operate safe, congestion free, and environmentally sound transportation systems. Exploratory research matches opportunities from discoveries in science and technology with the needs of our
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The Federal Highway Administration (FHWA) supports efforts by State and local governments or other public authorities as they establish, maintain, monitor, and evaluate local congestion pricing programs. FHWA with support from the Battelle Team (Battelle and the Texas A&M Transportation Institute (TTI)) hosted a series of Regional Congestion Pricin
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The primary goal ofTRC2201 was to enhance the durability of asphalt pavements in Arkansas. This was accomplished through two steps: exploring extreme scenarios with lab mixtures and comparing eight field sites. Further analysis was conducted using Pavement ME and a life-cycle cost analysis. In the extreme scenario, air voids decreased as Pb and N l
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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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The purpose of this Primer is to: 1) summarize previous methods used to evaluate operations strategies, 2) document the recurring congestion operational strategy implementation evaluation methodology developed for the project, including the performance measures needed to characterize benefits and costs and how to relate to third performance managem
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This Excel Spreadsheet contains the Electric Vehicle Decision Support Tool: The life cycle cost analysis tool allows for a life cycle cost analysis comparison of multiple vehicles, including electric vehicles (EV), hybrid electric vehicles (HEV), and internal combustion engine vehicles (ICEV). The tool requires inputs about how the vehicle will be
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In December 2022, the Virginia Transportation Research Council completed the technical assistance report, Potential for Electrification of the VDOT Vehicle Fleet, which investigated how electric trucks might integrate into the Virginia Department of Transportation’s (VDOT) fleet. That study was based on daily mileages of a sample of VDOT’s current
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United States. Department of Transportation. Federal Highway Administration
2019-01-01
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PDF
FHWA's Office of Operations has released several national reports to communicate recent trends in congestion as well as strategies to manage congestion and improve mobility. These reports provide an annual snapshot of congestion in the United States by summarizing recent trends in congestion, highlighting the role of travel time reliability in the
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United States. Department of Transportation. Federal Highway Administration
2022-01-01
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PDF
FHWA's Office of Operations has released several national reports to communicate recent trends in congestion as well as strategies to manage congestion and improve mobility. These reports provide an annual snapshot of congestion in the United States by summarizing recent trends in congestion, highlighting the role of travel time reliability in the
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An increasing number of Texas Department of Transportation (TxDOT) projects are requiring mitigation of wetland impacts. Many of these sites are very small, which can be very difficult and expensive to develop with no real assurance of success. There is considerable statewide concern and nationally documented evidence that, even using the best avai
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Swelling and shrinkage of subgrade soils are critical factors contributing to increases in roughness and degradation of serviceability of highway pavements. Existing procedures for predicting swell are largely based on the potential vertical rise (PVR) procedure developed by McDowell in 1956. While the PVR procedure represents a major development i
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Swelling and shrinkage of subgrade soils are critical factors contributing to increases in roughness and degradation of serviceability of highway pavements. Existing procedures for predicting swell are largely based on the potential vertical rise (PVR) procedure developed by McDowell in 1956. While the PVR procedure represents a major development i
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Swelling and shrinkage of subgrade soils are critical factors contributing to increases in roughness and degradation of serviceability of highway pavements. Existing procedures for predicting swell are largely based on the potential vertical rise (PVR) procedure developed by McDowell in 1956. While the PVR procedure represents a major development i
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This study compares the service life models of concrete structures against chloride-induced corrosion. Empirical, stochastic, and mechanistic-based service life models were studied. Two popular mechanistic service life models, Life-365 and fib Bulletin 34, were further evaluated. From the design of experiment and statistical analysis, the important
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The objective of this project was to evaluate and compare different models used to predict the service life of concrete structures under the risk of chloride-induced corrosion and identify the most suitable model for FDOT. The project also sought to recommend appropriate input parameters for the selected model, considering Florida’s unique environm
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The Seattle SMART Grant Digital Commercial Vehicle Permit Project advanced work to provide reliable, modern curb access for commercial delivery vehicles using a collaborative, data driven approach. Short-term goals were to engage with local businesses and commercial delivery users with a Seattle Department of Transportation (SDOT) issued decal to p
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The Seattle SMART Grant Digital Commercial Vehicle Permit Project advanced work to provide reliable, modern curb access for commercial delivery vehicles using a collaborative, data driven approach. Short-term goals were to engage with local businesses and commercial delivery users with a Seattle Department of Transportation (SDOT) issued decal to p
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The Seattle SMART Grant Digital Commercial Vehicle Permit Project advanced work to provide reliable, modern curb access for commercial delivery vehicles using a collaborative, data driven approach. Short-term goals were to engage with local businesses and commercial delivery users with a Seattle Department of Transportation (SDOT) issued decal to p
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