United States Department of Transportation
i
Storm related closures of I-5 and I-90 : freight transportation economic impact assessment report, winter 2007-2008.
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2008-09-01
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[PDF-1.24 MB]
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Alternative Title:Storm-related closures of Interstate 5 and Interstate 90
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Edition:Final.
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Abstract:This report documents the economic impact analysis undertaken by WSDOT’s Freight Systems Division in response to the
storm-related closures of I-5 and I-90 in the winter 2007-2008. The closures were the result of severe weather that
overwhelmed the roadways and disrupted freight and passenger movements across the state and the West Coast. In all, the
highways were closed for eight days, four days for I-5 and four days for I-90. In an effort to obtain a more complete picture
of the statewide economic impacts of the highway closures than is typically available through traditional economic impact
assessment methods, WSDOT contracted with Washington State University’s Social and Economic Sciences Research
Center (SESRC) to conduct survey research and economic analysis of the two storm-related events. WSDOT staff and
SESRC researchers worked together to design and develop a new economic assessment methodology that would provide the
state’s citizens and decision-makers with a reality-based, comprehensive analysis of the effects of the closures on the state’s
freight industry and economy as a whole.
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