00149220

Component

http://onlinepubs.trb.org...s/trr/1976/597/597-007.pdf

http://scholar.google.com...nner&publication_year=1976

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.

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.

01411453

FCP 42l1024

C-1-12

p 38

1976

Transportation Research Record

0309025664

Digital/other

Information processing; Interchange ramps; Location; Metropolitan areas; Spacing; Traffic congestion; Traffic control devices

Highways; Operations and Traffic Management

TRIS, TRB

Mar 30 1977 12:00AM

• EVALUATION OF RAISED PAVEMENT MARKERS FOR REDUCING INCIDENCES OF WRONG-WAY DRIVING (ABRIDGMENT)
• GUIDELINES FOR APPLICATION OF SELECTED SIGNS AND MARKINGS ON LOW-VOLUME RURAL ROADS
• INDUCTIVE LOOP VEHICLE DETECTOR: INSTALLATION ACCEPTANCE CRITERIA AND MAINTENANCE TECHNIQUES (ABRIDGMENT)
• OPTIMAL CONTROL OF ISOLATED TRAFFIC SIGNALS (ABRIDGMENT)
• PLATOON DISPERSION CHARACTERISTICS ON ONE-WAY SIGNALIZED ARTERIALS (ABRIDGMENT)
• PROGRESSIVE SIGNAL SYSTEM IN A NETWORK OF ARTERIAL STREETS (ABRIDGMENT)
• SOME RESULTS ON GUIDELINES FOR TREATMENT OF THE TRAFFIC CONGESTION ON STREET NETWORKS
• SPEED REDUCTION IN SCHOOL ZONES (ABRIDGMENT)
• STABILITY OF OCCUPANCY-BASED LIBRARY TRAFFIC CONTROL SYSTEMS
• TRUCK BLOCKAGE OF SIGNALS