United States Department of Transportation
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Travel Impacts of Freeway Reconstruction: Synthesis of Previous Research and Experiences
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1987-09-01
[PDF-3.93 MB]
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Edition:Interim Report
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Abstract:This report summarizes related experiences, existing computer models, and other research that should be incorporated into a comprehensive data base and sound analytical approach for estimating the changes in traffic patterns and road user costs resulting from freeway construction options. The traffic management and impact mitigation strategies and actual travel impacts were reviewed for major urban freeway reconstruction projects in Chicago, Pittsburgh, Boston, Seattle, Philadelphia, and Detroit. Nine existing computer models were evaluated including QUEWZ, FREWAY, PASSER IV, CORQ-CORCON, HEEM-II, FREQ, FREFLO, INTRAS, AND CARHOP. It was concluded that none of the models satisfy all of the requirements of Study 2- 8-87-1108, but that QUEWZ comes closest and is the best candidate for further development. PASSER IV, CORQ-CORCON, HEEM-II, and CARHOP have important traffic assignment capabilities that may be useful in estimating changes in traffic patterns. FREWAY, FREQ, FREFLO, and INTRAS have traffic simulation capabilities that may be useful in estimating traffic flow characteristics. Research on traffic flow characteristics through work zones, the response of drivers to work-zone-related delays, and road user costs were also reviewed.
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