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Title: INNOVATIVE EVALUATIONS OF TRAFFIC SYSTEM MANAGEMENT MEASURES FOR POSTEARTHQUAKE PROJECTS IN OAKLAND, CALIFORNIA
Accession Number: 00622234
Record Type: Component
Availability: Find a library where document is available Abstract: On October 17, 1989, the upper deck of the I-880 elevated freeway structure between 18th and 34th streets in Oakland, California, collapsed because of the Loma Prieta earthquake. The collapse of this Cypress Viaduct severed the major artery, disrupting local and regional transportation. An interim replacement for the Cypress Viaduct could not be put in place because of community opposition, so the California Department of Transportation (Caltrans) had to develop interim traffic system management (TSM) measures to relieve severely congested freeways. The innovative network-based methodology used to analyze the interim TSM alternatives proposed by Caltrans is described, and the alternatives' projected effectiveness in relieving congestion on freeways and arterials in Oakland is examined. The analysis used performance-based ranking to select the alternatives that would qualify for FHWA emergency relief funding. The examination of results from various combinations of alternatives is included, and the phenomenon called synergistic effect is introduced as a measure of effectiveness to rank the combinations. The need for simultaneous improvement of arterials, ramp metering, and freeways to achieve optimum delay reduction and freeway congestion relief is also discussed. The synergistic effects of the combined alternatives are compared, and the projects approved by FHWA are listed.
Supplemental Notes: This paper appears in Transportation Research Record No. 1327, Visibility, Rail-Highway Grade Crossings, and Highway Improvement Evaluation 1991. 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 Accession #: 01407196
Authors: Meyer, Keith GRajappan, Bala MPagination: p. 62-72
Publication Date: 1991
Serial: ISBN: 0309051673
Features: Figures
(4)
; References
(1)
; Tables
(4)
TRT Terms: Identifier Terms: Geographic Terms: Old TRIS Terms: Subject Areas: Environment; Highways; Operations and Traffic Management; I73: Traffic Control
Files: TRIS, TRB
Created Date: May 31 1992 12:00AM
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