00621677

Component

http://onlinepubs.trb.org...trr/1991/1320/1320-002.pdf

https://scholar.google.co...sser&publication_year=1991

Fundamental to the operation of most intelligent vehicle-highway systems (IVHS) projects are advanced systems for surveillance, control, and management of integrated freeway and arterial networks. A major concern in the development of so-called "smart roads" is the provision of decision support for traffic management center personnel, particularly for addressing nonrecurring congestion in large or complex networks. Decision support for control room staff is necessary to detect, verify, and develop effective response strategies for traffic incidents. These incidents are events that disrupt the orderly flow of traffic and cause nonrecurring congestion and motorist delay. Nonrecurring congestion can be caused by accidents, spilled loads, stalled or broken-down vehicles, maintenance and construction activities, signal and detector malfunctions, and special or unusual events. An attempt was made to implement a novel, artificial intelligence-based approach to the problem of providing operator decision support in integrated freeway and arterial traffic management systems, as part of a more general IVHS. The development of the Freeway Real-Time Expert System Demonstration (FRED), a component prototype real-time expert system for managing nonrecurring congestion on urban freeways in southern California, is discussed. The application of FRED to a section of the Riverside Freeway (SR-91) in Orange County is presented as a case study and illustrates the current capabilities of the system.

This paper appears in Transportation Research Record No. 1320, Freeway Operations, Highway Capacity, and Traffic Flow 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

01407170

p. 7-16

1991

Transportation Research Record

0309051533

Figures (9) ; References (7)

Artificial intelligence; Case studies; Demonstration projects; Expert systems; Freeways; Highway traffic control; Real time control; Real time data processing; Traffic congestion; Traffic incidents; Urban areas

Incidents

Orange County (California)

Orange County (California)

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

• ALINEA: A LOCAL FEEDBACK CONTROL LAW FOR ON-RAMP METERING
• ASSESSMENT OF THE TRAFFIC EXPERIMENTAL AND ANALYSIS SIMULATION COMPUTER MODEL USING FIELD DATA
• BENEFITS OF CENTRAL COMPUTER CONTROL FOR DENVER RAMP-METERING SYSTEM
• CAPACITY AND DELAY CHARACTERISTICS OF TWO-WAY STOP-CONTROLLED INTERSECTIONS
• CHARACTERISTICS AND LEVEL-OF-SERVICE ESTIMATION OF TRAFFIC FLOW ON TWO-LANE RURAL ROADS IN FINLAND
• DELAY EFFECTS ON DRIVER GAP ACCEPTANCE CHARACTERISTICS AT TWO-WAY STOP-CONTROLLED INTERSECTIONS
• DEVELOPMENT OF APPROPRIATE DESIGN-HOUR VOLUMES FOR URBAN FREEWAYS IN LARGE TEXAS CITIES
• EMPIRICAL ANALYSIS OF CONGESTED TRAFFIC FLOW CHARACTERISTICS AND FREE SPEED AFFECTED BY GEOMETRIC FACTORS ON AN INTERCITY EXPRESSWAY
• ENHANCEMENT AND FIELD TESTING OF A DYNAMIC FREEWAY SIMULATION PROGRAM
• EVALUATION OF HIGH-VOLUME URBAN TEXAS FREEWAYS
• EXAMINATION OF THE SPEED-FLOW RELATIONSHIP AT THE CALDECOTT TUNNEL
• FLOW AND CAPACITY CHARACTERISTICS ON TWO-LANE RURAL HIGHWAYS
• FREEWAY CAPACITY DROP AND THE DEFINITION OF CAPACITY
• FREEWAY CONTROL USING A DYNAMIC TRAFFIC FLOW MODEL AND VEHICLE REIDENTIFICATION TECHNIQUES
• IMPROVED DATA SCREENING TECHNIQUES FOR FREEWAY TRAFFIC MANAGEMENT SYSTEMS
• INTEGRATED SYSTEM OF FREEWAY CORRIDOR SIMULATION MODELS
• LESS-THAN-TRUCKLOAD TRUCKING IN LOS ANGELES: CONGESTION RELIEF THROUGH TERMINAL SITING
• OPERATIONAL EVALUATION OF TRUCK RESTRICTIONS ON I-20 IN TEXAS
• PROCEDURE FOR VALIDATION OF MICROSCOPIC TRAFFIC FLOW SIMULATION MODELS
• PROPOSED ANALYTICAL TECHNIQUE FOR ESTIMATING CAPACITY AND LEVEL OF SERVICE OF MAJOR FREEWAY WEAVING SECTIONS
• REAL-TIME KNOWLEDGE-BASED INTEGRATION OF FREEWAY SURVEILLANCE DATA
• SATURATION FLOW: DO WE SPEAK THE SAME LANGUAGE?
• SIMULATION OF CROWD BEHAVIOR AND MOVEMENT: FUNDAMENTAL RELATIONS AND APPLICATION
• SIMULATION OF TWO- AND FOUR-WAY STOP CONTROL
• THE TWO-CAPACITY PHENOMENON: SOME THEORETICAL ISSUES
• TOLL PLAZA CAPACITY AND LEVEL OF SERVICE
• TOWARD A NEW GERMAN GUIDELINE FOR CAPACITY OF UNSIGNALIZED INTERSECTIONS
• TRAFFIC OPERATION OF BICYCLE TRAFFIC
• TWO-CAPACITY PHENOMENON AT FREEWAY BOTTLENECKS: A BASIS FOR RAMP METERING?