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Title: PEAK PERIOD ANALYSIS AND CONTROL OF A FREEWAY SYSTEM /WITH DISCUSSION/
Accession Number: 00225135
Record Type: Component
Abstract: PEAK PERIOD FREEWAY CONTROL TECHNIQUES ARE DISCUSSED. A METHOD IS PRESENTED WHICH INVOLVES THE USE OF TOTAL FLOW /IN ONE DIRECTION/ WHICH MUST BE MAINTAINED AT LEVELS LESS THAN OR EQUAL TO THE CAPACITY AT EACH FREEWAY BOTTLENECK. THIS CONTROL HAS GREAT POTENTIAL BECAUSE THE USE OF TOTAL FLOW ACROSS ALL FREEWAY LANES PERMITS USE OF THE CONTINUITY CHARACTERISTICS OF TRAFFIC FLOW, THEREBY MAKING SYSTEM CONSIDERATIONS POSSIBLE. EACH LOCAL CONTROLLER OBTAINS THE DESIRED MERGE RATE FROM THE CENTRAL COMPUTER AND THEN DETERMINES THE TIME HEADWAYS BETWEEN ENTERING VEHICLES TO MAINTAIN THIS RATE OF MERGE. THE CENTRAL COMPUTER MONITORS THE FREEWAY OPERATION BY EXAMINING THE DETECTOR OUTPUTS. IT DETERMINES WHETHER NORMAL OR REDUCED CAPACITY OPERATIONS PREVAIL AND ESTABLISHES THE PROPER MERGING RATES AT EACH ENTRANCE RAMP IN THE SYSTEM. IT SUPPLIES THESE RATES TO THE LOCAL CONTROLLERS WHICH THEN MAINTAINS THEM.
Supplemental Notes: Paper sponsored by Committee on Freeway Operations and presented at the 45th 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.
Monograph Title: Monograph Accession #: 01410109
Authors: Wattleworth, Joseph ADiscussers: Gervais, Edward F; Foote, Robert S; May Jr, Adolf D; Wattleworth, Joseph A
Pagination: pp 1-21
Publication Date: 1967
Serial: Media Type: Digital/other
Features: Figures
(5)
; References
(9)
; Tables
(11)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Operations and Traffic Management
Files: TRIS, TRB
Created Date: Jun 5 1994 12:00AM
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