METHODOLOGY FOR ESTIMATING ECONOMIC IMPACTS OF HIGHWAY IMPROVEMENTS: TWO CASE STUDIES IN TEXAS

Abstract

A methodological procedure that can be used by practitioners in estimating the economic impact of proposed highway improvements is outlined. The methodology is followed in measuring the impact of proposed improvements to U.S. Highway 287 in Wichita Falls and State Highway 199 in Tarrant County. Both have alternative routes that were evaluated. U.S. Highway 287 had two existing route alternatives, elevated and depressed express freeway lanes, and three bypass freeway route alternatives. State Highway 199 had one existing route freeway alternative and two bypass freeway alternatives. The State Highway 199 alternatives would affect Tarrant County and four to five cities, including Fort Worth. A summary of the results from these two case studies is reported. Benefit-cost ratios are calculated for the nonuser effects and the user effects measured in dollars. The objective was to estimate the economic effects resulting from implementing each alternative for each proposed highway improvement. The effects estimated are (a) impact on businesses, distinguishing between traffic-serving and other types of businesses; (b) impact on property values; (c) impact on new development; (d) impact on relocation and employment, including that caused by construction expenditures and loss of clientele; (e) impact on municipal tax revenues; and (f) impact on highway users. Data from previous studies, secondary sources, the Texas Department of Transportation, and the study areas, are used to make these estimates. The results will be used as supporting data in the environmental impact statements that will be presented at public hearings.

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