00196605

Component

http://onlinepubs.trb.org...s/trr/1978/682/682-014.pdf

https://scholar.google.co...iams&publication_year=1978

The design, operation, and effects of a freeway surveillance and control system that became operational near Toronto, Ontario, in July 1975 are described. The system consists of a low-light level closed-circuit television system, microprocessor-based ramp-metering controls, ramp and mainline loop-detector installations, a central traffic-control computer, and a cathode ray tube graphic display. A single broadband coaxial cable is used for both television and two-way data transmission. The system provides traffic-responsive control that is based on both mainline and ramp conditions, incident detection, hardware-status monitoring, and a performance evaluation and reporting capability. The control center is located in a local Ontario Provincial Police facility near the freeway. Operating experience is discussed in terms of the effect of adverse public reaction to ramp metering, driver behavior, and system reliability. Substantial improvements in travel time and freeway speeds have been achieved, even under poor operating conditions, and the accident rate appears to have decreased. The closed-circuit television system has proved to be a valuable tool for traffic and incident management, particularly because of the close interaction with the police. The incident-detection system has been operating satisfactorily but requires verification by using the television system to eliminate false alarms. Overall, the project is considered to be successful. /Authors/

Publication of this paper sponsored by Committee on Freeway Operations.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

01411521

pp 84-93

1978

Transportation Research Record

57th Annual Meeting of the Transportation Research Board

0309028272

Print

Figures (13) ; Maps; Photos; References (2)

Behavior; Closed circuit television; Computers; Demonstration projects; Drivers; Freeways; Monitoring; Motor vehicles; Performance tests; Police; Speed; Surveillance; Traffic control; Traffic incidents; Traffic speed

Incidents

Highways; Operations and Traffic Management; Security and Emergencies

TRIS, TRB

Sep 15 1979 12:00AM

• ALTERNATIVE OBJECTIVES IN ARTERIAL-TRAFFIC MANAGEMENT
• ANALYSIS OF DRIVER RESPONSES TO POINT DIVERSION FOR SPECIAL EVENTS
• APPLICATION OF FREEWAY-CORRIDOR ASSIGNMENT AND CONTROL MODEL
• DERIVATION OF FREEWAY SPEED PROFILES FROM POINT SURVEILLANCE DATA. ABRIDGMENT
• DEVELOPMENT OF EFFICIENT PROCEDURE FOR RECREATING AND ANALYZING TRAFFIC FLOW PATTERNS ON URBAN FREEWAYS
• DISTANCE REQUIREMENTS FOR FRONTAGE-ROAD RAMPS TO CROSS STREETS: URBAN FREEWAY DESIGN
• EVALUATION OF REDUCTION IN MINIMUM OCCUPANCY FOR CAR POLLS THAT USE A PRIORITY FREEWAY LANE
• FIELD EVALUATION OF MESSAGES FOR REAL-TIME DIVERSION OF FREEWAY TRAFFIC FOR SPECIAL EVENTS
• FREEWAY INCIDENT-DETECTION ALGORITHMS BASED ON DECISION TREES WITH STATES
• INCIDENT DETECTION: A BAYESIAN APPROACH
• METHODOLOGY FOR EVALUATION OF ALTERNATIVE LOW-COST FREEWAY-INCIDENT MANAGEMENT TECHNIQUES. ABRIDGMENT
• OPTIMIZATION OF LARGE TRAFFIC SYSTEMS
• PREDICTING EFFECTIVENESS OF TRANSPORTATION SYSTEM MANAGEMENT MEASURES
• PUBLIC REACTION TO PRIORITY LANE FOR BUSES AND CAR POOLS IN MIAMI
• ROLE OF PARKING IN TRANSPORTATION SYSTEM MANAGEMENT
• STIMULUS-RESPONSE LANE-CHANGING MODEL AT FREEWAY LANE DROPS. ABRIDGMENT
• TRAFFIC-CONDITION GRADE: EVALUATION OF CONCEPT. ABRIDGMENT