| UW | WSU | WSDOT |
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This project conducted a statewide community outreach effort designed to inform the Washington State Department of Transportation (WSDOT) about the transportation spending priorities of state residents as part of WSDOT’s update of the Highway System Plan. ... Read More about Community Engagement Support for the Highway System Plan Update | |
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In March 2020, coinciding with shutdowns caused by the COVID-19 pandemic, the West Seattle Bridge, the main bridge connecting West Seattle with the rest of the city of Seattle, was closed to traffic because of structural deterioration. The unexpected closure of the bridge disrupted passenger and freight mobility to/from West Seattle, increasing travel times and generating bottlenecks on the remaining bridges. This project documented the impacts of the closure on freight flow in and out of West Seattle. ... Read More about West Seattle Bridge Case Study | |
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During roadway construction, transportation agencies frequently unearth industrial soil contamination that threatens both public health and the environment. Management of such compounds to meet environmental regulations can cause construction delays and increase costs. For this study, the researchers sought to develop an accelerated in situ treatment approach adaptable for use at any construction site to cost-effectively remove high-molecular-weight polycyclic aromatic hydrocarbons and metals from clayey soil. ... Read More about Bench-Scale Electrochemical Treatment of Co-contaminated Clayey Soil | |
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During roadway construction, transportation agencies frequently encounter soils containing inorganic compounds that can pose a threat to human health and the environment. Management of such compounds to meet environmental regulations can cause construction delays and increase costs. The researchers in this study sought to develop an accelerated in situ electrochemical treatment for extracting inorganic compounds from fine-grained soils. ... Read More about Evaluation of Electrochemical Treatment for Removal of Arsenic and Manganese from Field Soil | |
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The Final 50 Feet Research Program focuses on the “final 50 feet” of the urban goods delivery system, including searching for parking; loading/unloading; maneuvering intersections, curbs, and other obstacles; and delivering goods to customers. Researchers have used a systems engineering approach to investigate solutions to optimizing delivery operations in the final 50 feet of the supply chain. They have analyzed both the street network and the city’s vertical space as one integrated goods delivery system to ultimately reduce carbon emissions and increase curb efficiency for goods delivery. ... Read More about Final 50 Feet: Urban Goods Delivery Systems | |
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The use of recycled asphalt pavement (RAP) is a sustainable practice that potentially could help reduce construction costs, preserve the environment, and reduce greenhouse gas emissions, provided that the engineering performance of the roadways constructed with RAP is not compromised. This project sought to determine the limits for using RAP as a roadway embankment material and to develop draft specifications for the required material and its placement. ... Read More about Utility and Limitations of Using Recycled Asphalt Pavement (RAP) as Roadway Embankment Material | |
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Pre-wetting is an important part of winter road maintenance operations. This project compiled a summary of pre-wetting practices, including equipment, materials, methods, and application rates, and identified the history of successes and failures that have contributed to current practices. ... Read More about Review and Summary of Pre-Wet Methods and Procedures | |
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The Maintenance Division of the Missouri Department of Transportation (MoDOT) uses different materials to reduce the negative impacts of snow and ice on state roadways. In addition to plowing, the use of chemicals and abrasives for highway winter maintenance operations is an essential strategy for ensuring a reasonably high level of service. This project addressed information gaps regarding the performance and impacts of these materials. ... Read More about Snow and Ice Treatment Products Evaluation | |
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Blowing snow accounts for a large part of the Illinois Department of Transportation’s (IDOT) total winter maintenance expenditures. This project developed recommendations for the design and placement of living snow fences to minimize snowdrift on Illinois highways. More effective and efficient snow and ice control operations could produce significant economic, environmental, and social benefits for the state. ... Read More about Design of Living Barriers to Reduce the Impacts of Snowdrifts on Illinois Freeways | |
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Fish populations have decreased in the Puget Sound area in part because fish barriers such as culverts have limited the ability of fish to swim upstream to reach their food supplies and spawning grounds. This project looked at better ways to maintain a common replacement for traditional culverts, stream simulation culverts. ... Read More about Flume-Based Design Recommendations for Coarse Bands and Boulder Bars to Improve the Retention of Channel Shape in Stream Simulation Culverts | |
