TRAFFIC-RESPONSIVE RAMP CONTROL THROUGH THE USE OF A MICROCOMPUTER (ABRIDGMENT)
Traffic responsive ramp control has been proved effective in the reduction of traffic congestion on major metropolitan freeways. A low-cost ramp controller is needed that can serve traffic responsive ramp controls either for signal-ramp local operations or for operations involving multilevel controls. Since 1974, the California Department of Transportation has been conducting research and evaluations on the application of microcomputer for traffic responsive ramp controls. The second-generation microcomputers have sufficient capabilities to replace large-scale computers and mini-computers in most traffic control functions. Attractive features of microcomputers include low cost, small physical size, and operability within the ambient temperature range of minus 18 deg. C to 60 deg. C (minus 27.78 deg. F to 15.56 deg. F) without air conditioning. Use of the microcomputer probably will become standard on California highways for both ramp and intersection controls, especilly as a result of the growing emphasis on upgrading the operation of existing facilities rather than the building of new facilities.
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- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- Publication of this paper sponsored by Committee on Traffic Control Devices. 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:
- Fong, B C
- Donner, R L
- Publication Date: 1976
Media Info
- Media Type: Digital/other
- Pagination: p 38
- Monograph Title: Traffic control: signals and other devices
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Serial:
- Transportation Research Record
- Issue Number: 597
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Information processing; Interchange ramps; Location; Metropolitan areas; Spacing; Traffic congestion; Traffic control devices
- Old TRIS Terms: Freeway ramps; Ramp location & spacing
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00149220
- Record Type: Publication
- ISBN: 0309025664
- Report/Paper Numbers: FCP 42l1024
- Contract Numbers: C-1-12
- Files: TRIS, TRB
- Created Date: Mar 30 1977 12:00AM