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An Analysis of the Potential for Traffic Diversion to a Strategic Arterial System
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1990-06-01
[PDF-2.60 MB]
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Edition:Interim
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Abstract:This report presents the results of an analysis of strategic arterials and their effect on the travel demands of an urban region. The Texas travel demand models were used to macroscopically estimate potential demands for, and the magnitude of any reduction in travel demand on other parts of the regional transportation system due to the implementation of a system of strategic arterials. Two strategic arterial systems, one consisting of 600 miles of strategic arterials and the other composed of 350 miles of strategic arterials were delineated for the evaluation. In order to gauge any "shifts" in travel demand a base system (without strategic arterials) was analyzed as well. To accommodate what was initially a key parameter in estimating strategic arterial demands, the strategic arterials were tested at two different speed advantages over "normal" arterials. Two different types of assignments were performed with each of the strategic arterial systems in each speed advantage conditions. The first set of assignments focused on the potential for travel path diversion resulting from the implementation of a strategic arterial system and a second set of assignments was directed toward travel pattern diversion. The results of these analyses have shown that while speed does play a role in the demand on and diversion of traffic to strategic arterials, the overwhelming controlling factor involves the capacity of the strategic arterials. The travel demand modeling analyses show that demand on strategic arterials matches capacity in areas which are otherwise congested. Analysis results of proposed strategic arterial systems in the Dallas/Fort Worth region are also presented and were found to be comparable to those from the Houston region in terms of the effectiveness of strategic arterial systems in reducing demand on freeway systems.
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