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Title: INTERCHANGE STUDY AND SELECTION PROCESS
Accession Number: 00634567
Record Type: Component
Availability: Find a library where document is available Abstract: The ability of the public to use a highway facility to the capacity level for which the roadway was designed will depend to a great extent on the accommodations made for intersecting traffic patterns. The use of grade separations and interchanges can result in improved operations on both roadways. However, because of the investment required to provide grade separations, the selection of the highest priority locations and the design of the interchange are critical. One method of determining the priority of competing interchange locations is through a cost-benefit analysis. The Texas Transportation Institute developed a computer analysis program called Texas Ranking of Interchange Projects (TRIP) to accomplish a relative analysis of interchange cost reductions on a macroscopic level. The major economic benefits of an interchange include a reduction in delay costs, a reduction in vehicle operating costs, and the expected accident cost reductions. These benefits are summarized and matched against the expected construction and right-of-way costs of the proposed interchange. The selection of the interchange type is influenced by many external constraints. These constraints may include limited right-of-way, environmental considerations, historical structures, and handling traffic under construction. Interchange types include trumpets, diamonds, cloverleafs, and directionals. Each interchange type has specific advantages and disadvantages. The design selected must be constructible and maintainable under traffic and must be able to handle traffic movements into the ultimate design year. Experienced design, comprehensive research, and knowledgeable drivers are necessary to achieve the maximum highway user benefits from these facilities.
Supplemental Notes: This paper appears in Transportation Research Record No. 1385, Intersection and Interchange Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01403217
Language: English
Authors: Holzmann, Frank DMarek, Mark APagination: p. 90-99
Publication Date: 1993
Serial: ISBN: 0309054567
Features: Figures
(5)
; Photos
(4)
; References
(8)
TRT Terms: Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure
Files: TRIS, TRB, ATRI
Created Date: Aug 30 1993 12:00AM
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