Estimating induced travel for evaluation of metropolitan highway expansion |
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Authors: | DeCorla-Souza Patrick Cohen Harry |
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Institution: | (1) Federal Highway Administration, 400 Seventh St SW, HEP-20, Washington, DC, 20590, USA (E-mail;(2) 4507 Mustering Drum, Ellicott City, MD, 21402, USA (E-mail |
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Abstract: | This paper demonstrates how induced travel can be estimated for incorporation into the evaluation process for highway expansion projects, at a sketch planning level of analysis. The approach is useful especially in cases where four-step urban travel models are either unavailable or are unable to forecast the full induced demand effects. The methodology is applied to a hypothetical freeway expansion analysis. Our analysis suggests that the magnitude of travel induced by highway expansion increases significantly as a function of initial congestion levels prior to expansion. However, under even extreme scenarios of initial congestion and consequent forecasted induced travel, there is a positive impact with respect to congestion relief. |
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Keywords: | corridor analysis generated traffic induced travel metropolitan highway planning travel demand forecasting |
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