This Broadening workforce participation in the transportation industry is incredibly challenging. State of practice research highlights the reasons why this lack of participation in the workforce occurs. Fortunately, there are also identified strategies for alleviating the workforce challenges. This report highlights measures that transportation or
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In this project, we sought to couple two imaging technologies, drones and vehicle-mounted cameras, with models using artificial intelligence to predict the location of milkweed plants in Northern Nevada. Milkweeds are weedy plants that frequently occur along roadsides, and they are the only food used by caterpillars of the monarch butterfly, whose
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This research developed advanced AI-based methods for automated inspection of transportation assets, focusing on pavement markings and roadside litter. The methodology involved expanding and annotating two large-scale image datasets, each containing more than 6,000 self-collected images. Faded pavement markings were classified into white and yellow
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Historically, pedestrian signal heads have been internally illuminated using incandescent lamps. However, with the current widespread use of light emitting diodes (LEDs) in pedestrian signal heads, concerns regarding the visibility of LED devices have emerged. Research was needed to develop measurable visibility performance requirements for pedestr
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This report documents the first year of a two-year research project to develop potential measures that might be used to assess the performance of traffic signal timing at isolated intersections. This report summarizes the findings of a series of interviews we conducted to determine what measures the Texas Department of Transportation (TxDOT) is cur
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TxDOT research project 0-4421 “A Simplified Approach for Selecting Optimal Traffic Responsive Control Parameters” developed procedures and guidelines for setting up and operating coordinated systems with the traffic responsive plan selection (TRPS) mode. This project implemented the TRPS mode at four locations in Texas using customized versions of
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Texas Department of Transportation (TxDOT) research project 0-4421 "A Simplified Approach for Selecting Optimal Traffic Responsive Control Parameters" developed a novel scientific and computationally based procedure and guidelines for operating coordinated systems with traffic responsive plan selection (TRPS) mode. Since its development in the 1970
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In 2003, there were 38 metal truss bridges 50 years of age or older remaining on the State of Texas highway system. Of these 38 bridges, 33 are listed in the National Register of Historic Places. Many of these bridges do not meet current design criteria for rehabilitation due to narrow deck widths, low vertical clearance, and substandard load capac
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Elastomeric bearing pads of five different materials with shape factors ranging from one to six were subjected to a series of three specific tests to determine and compare their respective load-deformation characteristics. Compression-deflection tests were conducted to determine short time load-deflection responses for solid pads and laminated pads
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Regular inspection of transportation assets is essential to ensure pavement markings and pavements remain in good, clean, and safe condition. Our previous MPC-funded project (Report No. MPC-668) demonstrated the strong potential of using artificial intelligence (AI) and mobile phone imagery to identify various transportation assets. However, that i
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The federally endangered rusty patched bumblebee (Bombus affinis) provides a difficult set of challenges for management and conservation. Bumblebee species have complex life histories, interacting with different obligatory habitat requirements across the ontogeny of the colony. Transportation corridors present unique opportunities for interventions
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The Federal Radionavigation Plan (FRP) has been jointly developed by the U.S. Department of Defense and the U.S. Department of Transportation to ensure efficient use of resources and full protection of National interests. The plan sets forth the Federal interagency approach to the implementation and operation of radionavigation systems. The Federal
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Citizens request the installation of roadway lighting in their communities based on several motivations, including the experience or perception that lighting improves traffic safety and reduces crime, while also providing a tangible benefit of taxpayer dollars at work. Roadway authority staff fully appreciate these citizen concerns; however, roadwa
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This project tested whether limited non-destructive evaluation (NDE) data can be used to predict bridge deck deterioration more effectively. NDE tests, such as Impact Echo, provide objective measurements of deck damage, but they are costly and not collected regularly. Using bridge data from the Federal Highway Administration’s Long-Term Bridge Perf
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Amidst a growing traffic safety crisis in the United States, police enforcement remains a central, yet under-studied, strategy for improving safety outcomes. A significant barrier to research on police traffic enforcement has been the lack of a detailed and comprehensive database. California’s Racial and Identity Profiling Act (RIPA) confidential d
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The goal of the project summarized in this report was to research and develop criteria for updating and improving the ADOT Bridge Design Guidelines with respect to the strut-and-tie methodology defined in the AASHTO LRFD Bridge Design Specifications. To accomplish this goal, the existing literature was reviewed and bridge engineers in Arizona and a
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Several new truss bridges are planned throughout the state. Currently, the bridge railing proposed for these structures consists of a standard Texas Department of Transportation (TxDOT) railing, the T101, which is supported by a cast-in-place concrete deck. TxDOT would prefer to have the option to support a bridge rail system from the truss members
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John A. Volpe National Transportation Systems Center (U.S.)
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1980-07-01
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Federal Radionavigation Plan
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The Federal Radionavigation Plan (FRP) has been jointly developed by the U.S. Departments of Defense and Transportation to ensure efficient use of resources and full protection of National interests. The plan sets forth the Federal interagency approach to the implementation and operation of radionavigation systems. Volume IV is a summary of the Fed
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The Experimental Products Evaluation Program (EPEP) is an ongoing program established the Office of Research to provide The Oklahoma Department of Transportation (ODOT) with a means of evaluating, monitoring, and implementing the use of new experiments.
Use of high-performance concrete has tremendous potential for improving economy and long-term durability of structures. The State of Oklahoma has an abundance of high-quality aggregates that are necessary for the production of high strength/high performance.
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United States Department of Transportation
Ivey, Stephanie