TRUE DISTRIBUTED PROCESSING IN MODULAR TRAFFIC SIGNAL SYSTEMS--SAN ANTONIO DOWNTOWN SYSTEM
In San Antonio, limited funds precluded the traditional approach to a consultant-designed Urban Traffic Control System (UTCS) for traffic signal control in the downtown area. By applying principles now common in other parts of the computer industry, San Antonio engineers were able to formulate an alternative to the traditional approach that not only provides very substantial improvements in cost-effectiveness, maintainability, and reliability, but also provides the end user with complete access to the inner workings of the system. Emphasis on conforming to computer-industry standards of system design and commitment to open hardware and software architecture allowed full portability of software. Highly distributed processing greatly reduced the communications overhead while improving operation compared with other large-scale systems currently in operation in the United States. The San Antonio system has full-featured capabilities, including planned traffic-responsive operation, and uses one-tenth of the usual communications overhead without using a machine larger than a microcomputer. A comparison is made with a recent UTCS project.
- Record URL:
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309051703
-
Supplemental Notes:
- 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
-
Authors:
- Denney Jr, Richard W
- Chase, Michael J
- Publication Date: 1991
Media Info
- Features: Figures; References;
- Pagination: p. 130-136
- Monograph Title: Communications, traffic signals, and traffic control devices, 1991
-
Serial:
- Transportation Research Record
- Issue Number: 1324
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Central business districts; Communications; Cost effectiveness; Distributed processing; Microcomputers; Software; Traffic control; Traffic signals
- Uncontrolled Terms: Hardware
- Geographic Terms: San Antonio (Texas)
- Old TRIS Terms: Traffic control systems
- Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;
Filing Info
- Accession Number: 00622212
- Record Type: Publication
- ISBN: 0309051703
- Files: TRIS, TRB, ATRI
- Created Date: May 31 1992 12:00AM