Accounting for Induced Travel in Evaluation of Urban Highway Expansion
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1998-09-16
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TRIS Online Accession Number:00780098
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;NTL-ECONOMICS AND FINANCE-Economic Impacts;NTL-PLANNING AND POLICY-PLANNING AND POLICY;NTL-PLANNING AND POLICY-Travel Demand;
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Abstract:This paper demonstrates application of the principles of economic analysis to
evaluate highway capacity expansion in an urban setting, using a
sketch-planning model called Spreadsheet Model for Induced Travel Estimation
(SMITE). The application takes into account new travel that may be induced by
highway expansion over and above that which is simply diverted from other
regional highways. The paper demonstrates how the effects of induced travel can
be incorporated into the evaluation process at a sketch planning level of
analysis, especially in cases where four-step urban travel models are either
unavailable or are unable to forecast the full induced demand effects, such as
in small and medium-sized urban areas. The methodology and the SMITE spreadsheet
can be used to provide useful information to assist policy makers in evaluating
proposals for specific additions to highway capacity for corridor studies. 12p.
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