REVIEW OF RESEARCH ON CONTROLLING THE LEVEL OF SERVICE ON URBAN FREEWAYS

This paper presents a review of the research and implementation of traffic control systems in Texas. The magnitude of the problem is illustrated through data from freeways with the heaviest traffic flow in Texas. Systems that both control the level of service and only improve the level of service are discussed. Several approaches to entrance and exit ramp control are reviewed, and the entrance and exit advantages and disadvantages are dicussed. Control of freeway demand is outlined in terms of the problems of operation and implementation and the advantages of the control. The methods and procedures for improving the level of service of operation on urban freeways broaden the scope of the paper to include geometric expansion of the roadway, detection and removal of capacity-reducing incidents, and improvement of vehicle occupancy rates. All of these methods are directly affected by the availability and use of traffic surveillance, control, and motorist communications systems.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/sr/sr153/153-004.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0360859X
• Supplemental Notes:
  • Presented at the 7th Summer Mtg. of TRB in cooperation with Florida DOT, Jacksonville, Fla., Aug. 5-7, 1974. 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
• Corporate Authors:

  Transportation Research Board (TRB)

  Washington, DC   
• Authors:
  • McCasland, William R
• Conference:
  • 7th Summer Meeting of the Transportation Research Board
  • Location: Jacksonville Florida, United States
  • Date: 1974-8-5 to 1974-8-7
• Publication Date: 1975

Media Info

• Media Type: Digital/other
• Features: Tables;
• Pagination: pp 26-31
• Monograph Title: Better use of existing transportation facilities
• Serial:
  • Transportation Research Board Special Report
  • Issue Number: 153
  • Publisher: Transportation Research Board
  • ISSN: 0360-859X

Subject/Index Terms

• TRT Terms: Communication systems; Demand; Detection and identification; Detectors; Freeway operations; Freeways; Highway design; Improvements; Interchange ramps; Level of service; Traffic control; Traffic incidents; Traffic surveillance; Vehicle occupancy
• Uncontrolled Terms: Incidents
• Old TRIS Terms: Freeway design; Freeway entrances and exits
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00099494
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Nov 5 1975 12:00AM