PEAK-PERIOD CONTROL OF A FREEWAY SYSTEM-SOME THEORETICAL INVESTIGATIONS
A SERIES OF THEORETICAL CONSIDERATIONS PERTAINING TO THE CONTROL OF A FREEWAY SYSTEM DURING PEAK TRAFFIC PERIODS ATTEMPTS TO ANSWER SUCH QUESTIONS AS' WHAT ARE THE OBJECTIVES OF OPERATION OF A HIGHWAY SYSTEM, WHAT TYPE OF CONTROL TECHNIQUE SHOULD BE USED, WHAT TYPE OF TRAFFIC DETECTION IS REQUIRED, AND WHERE IS IT TO BE LOCATED{ TO PRODUCE OPTIMAL OPERATION OF THE ENTIRE FREEWAY SYSTEM WHAT CONTROL METHODS ARE NECESSARY{ AN ARBITRARY STREET AND/OR FREEWAY SYSTEM IS ANALYZED TO DETERMINE THE OBJECTIVE FUNCTION OR GOAL OF OPERATION FOR THE SYSTEM. INPUT-OUTPUT ANALYSIS IS USED. A THEORY OF FLOW AT BOTTLENECKS IS DEVELOPED TO EXPLAIN THE REDUCTION OF FLOW RATE AT SOME BOTTLENECKS DURING CONGESTION WHILE THE FLOW RATE AT OTHER BOTTLENECKS REMAINS AT ITS CAPACITY LEVEL DURING CONGESTION. THIS IS A MACROSCOPIC FLOW MODEL BASED ON BASIC CONTINUITY EQUATIONS. SEVERAL CRITERIA ARE ESTABLISHED FOR CONTROL TECHNIQUES AND THE POSSIBLE ROLE OF EACH IN A FINAL CONTROL SYSTEM IS DISCUSSED.
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Supplemental Notes:
- 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:
- Wattleworth, Joseph A
- Berry, Donald S
- Publication Date: 1965
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 1-25
- Monograph Title: Traffic flow theory
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Serial:
- Highway Research Record
- Issue Number: 89
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Bottlenecks; Control systems; Equations; Freeway operations; Mathematical analysis; Mathematical models; Output; Peak hour traffic; Traffic congestion; Traffic control; Traffic flow theory
- Uncontrolled Terms: Continuity; Input; Models
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00226995
- Record Type: Publication
- Report/Paper Numbers: HS-006 579
- Files: TRIS, TRB
- Created Date: Aug 13 2004 6:55PM