United States Department of Transportation
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Roadway Congestion in Major Urban Areas 1982 to 1987
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1989-10-01
[PDF-7.86 MB]
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Edition:Interim September 1987 to February 1990
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Abstract:This research report is an update and expansion of "The Impact of Declining Mobility in Major Texas and Other U.S. Cities," Research Report no. 431-lF. This study expanded the number of urban areas studied to 39, to better represent a geographical cross-section of urban areas throughout the country. An assessment of the freeway and major street operating conditions was performed in seven Texas and 32 other urban areas in the continental United States. In addition, the analyses from 1982 to 1986 were updated to include 1987 urban area data. Vehicle-miles of travel and lane-miles of roadway data were collected from a variety of sources to estimate congestion on the freeway/ expressway and principal arterial street systems. The values for each system were combined into a roadway congestion index used to rank mobility in each urban area on a relative scale. An analysis of the cost of this congestion was performed using travel delay, increased fuel consumption and increased auto insurance premiums as the economic analysis factors. The economic cost to the urban area, and to the individual resident, was estimated.
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