00622210

Component

http://onlinepubs.trb.org...trr/1991/1324/1324-013.pdf

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

Signal Control at Isolated Intersection (SCII) is a knowledge-based expert system prototype. It represents an application of expert systems to adaptive signal control. The first generation of the prototype was developed at Arizona State University in 1987. The second-generation SCII can handle three types of intersection geometries. At the end of each signal cycle, SCII determines the performance of the controller operation during that cycle. In case of an unsatisfactory performance, SCII determines the appropriate cycle length, phasing pattern, and split. It also updates the cycle length and phasing scheme based on traffic demand. Different tests validated and calibrated the prototype using a simulation approach. A 20-min traffic volume data set was used to simulate a pretimed controller, an actuated controller, and the operations suggested by SCII. The tests demonstrated the potential of this prototype to reduce delay at isolated intersections.

This paper appears in Transportation Research Record No. 1324, Communications, Traffic Signals, and Traffic Control Devices 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

01407197

p. 115-122

1991

Transportation Research Record

0309051703

Figures (4) ; References (20) ; Tables (1)

Adaptive control; Expert systems; Isolated intersections; Prototype tests; Reduction (Chemistry); Signalized intersections; Traffic delays; Traffic signal phases; Traffic signal timing; Traffic volume

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

May 31 1992 12:00AM

• ALGORITHM FOR ESTIMATING QUEUE LENGTHS AND STOP DELAYS AT SIGNALIZED INTERSECTIONS
• COMPARISON OF LEFT-TURN ACCIDENT RATES FOR DIFFERENT TYPES OF LEFT-TURN PHASING
• DEVELOPMENT OF A SELF-ORGANIZING TRAFFIC CONTROL SYSTEM USING NEURAL NETWORK MODELS
• EVALUATION OF DELAY MODELS FOR MOTOR VEHICLES AT LIGHT RAIL CROSSINGS
• EVALUATION OF OPTIMIZED POLICIES FOR ADAPTIVE CONTROL STRATEGY
• FIELD TRIALS AND EVALUATIONS OF RADIO DATA SYSTEM TRAFFIC MESSAGE CHANNEL
• GUIDELINES FOR USE OF LEADING AND LAGGING LEFT-TURN SIGNAL PHASING
• INTERGREEN INTERVAL CONTROVERSY: TOWARD A COMMON FRAMEWORK (WITH DISCUSSION AND CLOSURE)
• ISSUES IN COMMUNICATION STANDARDIZATION FOR ADVANCED VEHICLE CONTROL SYSTEMS
• LEFT-TURN SIGNAL PHASING FOR FULL-ACTUATED SIGNAL CONTROL
• POST-MOUNTED DELINEATORS AND RAISED PAVEMENT MARKERS: THEIR EFFECT ON VEHICLE OPERATIONS AT HORIZONTAL CURVES ON TWO-LANE RURAL HIGHWAYS
• PROPOSED ENHANCEMENTS TO MAXBAND 86 PROGRAM
• SCHEME TO OPTIMIZE CIRCULAR PHASING SEQUENCES
• TRANSYT-7F OR PASSER II, WHICH IS BETTER--A COMPARISON THROUGH FIELD STUDIES
• TRUE DISTRIBUTED PROCESSING IN MODULAR TRAFFIC SIGNAL SYSTEMS--SAN ANTONIO DOWNTOWN SYSTEM