FEASIBILITY OF AN EXCLUSIVE LANE FOR BUSES ON THE SAN FRANCISCO-OAKLAND BAY BRIDGE
THE STUDY WAS INITIATED BY A REQUEST FROM THE U.S. BUREAU OF PUBLIC ROADS FOR AN EVALUATION OF THE POTENTIAL FOR RESERVING ONE OR MORE EXCLUSIVE BUS LANES ON THE SAN FRANCISCO-OAKLAND BAY BRIDGE. THIS SECTION OF HIGHWAY HAS THE GREATEST PEAK-HOUR BUS CONCENTRATION IN CALIFORNIA, AND DELAY OCCURS BECAUSE DEMAND EXCEEDS CAPACITY DURING PEAK PERIODS. THE EXISTING TRAFFIC CONDITIONS WERE SURVEYED FOR BOTH MORNING AND EVENING PEAK PERIODS. THE DATA OBTAINED INCLUDED CAPACITY OF BRIDGE, NUMBER OF PERSONS USING EACH MODE, VOLUMES (AUTOMOBILES AND BUSES), TRAVEL TIMES, AND DEMAND. THIS INFORMATION WAS USED TO DETERMINE THE PRESENT PERSON-DELAY BEING SUFFERED. THESE DATA WERE THEN USED IN A SIMULATION OF CONDITIONS WITH AN EXCLUSIVE BUS LANE IN EFFECT. THE ASSUMPTION WAS MADE THAT THE LANE USED EXCLUSIVELY FOR BUSES WAS PREVIOUSLY A LANE USED FOR MIXED TRAFFIC IN THE SAME DIRECTION. A GRAPH WAS DEVELOPED THAT SHOWED PERSON-DELAY WITH AND WITHOUT AN EXCLUSIVE BUS LANE AS A FUNCTION OF MODAL SPLIT. THIS PAPER CONCLUDES THAT AN EXCLUSIVE BUS LANE ON THE BAY BRIDGE IS NOT FEASIBLE BECAUSE THE INCREASED DELAY TO AUTOMOBILE USERS WOULD FAR EXCEED THE SAVINGS TO THE BUS PASSENGERS. AT THE PRESENT DEMAND THERE IS NO MODAL SPLIT THAT WOULD MAKE AN EXCLUSIVE BUS LANE FEASIBLE. THE CONCLUSIONS WERE BASED PRINCIPALLY ON RECURRENT CONGESTION. IF NONRECURRENT CONGESTION SUCH AS THAT CAUSED FROM BREAKDOWNS AND ACCIDENTS HAD BEEN INCLUDED IN THE DELAY, THE EXCLUSIVE BUS LANE ALTERNATIVE WOULD HAVE BEEN EVEN MORE DETRIMENTAL. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Freeway Operations and presented at the 49th Annual Meeting. 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
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Authors:
- Martin, Darryl B
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Discussers:
- Koppelman, Frank S
- Publication Date: 1970
Media Info
- Media Type: Print
- Features: Appendices; Figures; Photos; Tables;
- Pagination: pp 17-29
- Monograph Title: Freeway operations, surveillance and communications
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Serial:
- Highway Research Record
- Issue Number: 303
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Bus lanes; Costs; Highway bridges; Highway capacity; Modal split; Peak hour traffic; Traffic congestion; Traffic delays
- Subject Areas: Finance; Highways; Operations and Traffic Management; Public Transportation;
Filing Info
- Accession Number: 00225793
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 21 1970 12:00AM