RAMP CAPACITY AND SERVICE VOLUME AS RELATED TO FREEWAY CONTROL

THE PROBLEM OF ESTABLISHING A POLICY FOR FREEWAY CONTROL CAN BE STRUCTURED INTO AN ORDERED SET OF CONTROL PROBLEMS WITHIN A HIERARCHY OF LEVELS OF CONTROL. AT EACH LEVEL ASSOCIATED WITH THE HIERARCHY OF THE PROBLEM STRUCTURE, AN INTERRELATION EXISTS AMONG FREEWAY-CAPACITY, FREEWAY-DEMAND, RAMP-CAPACITY, RAMP-DEMAND, OUTSIDE-FREEWAY-LANE-FLOW, AND RAMP-MERGING CHARACTERISTICS AND MERGING-CONTROL SYSTEM OPERATION. THE EXTENT TO WHICH AN OPTIMUM CONTROL POLICY CAN BE ESTABLISHED AT EACH LEVEL OF CONTROL IS DIRECTLY RELATED TO THE EXTENT TO WHICH THE PERTINENT TRAFFIC AND CONTROL SYSTEM VARIABLES CAN BE INTERRELATED. IN THIS REPORT, RAMP CAPACITY AND SERVICE VOLUME ARE DEFINED IN TERMS OF ENTRANCE-RAMP GEOMETRY AND GAP-ACCEPTANCE AND MERGING- CONTROLLER-OPERATIONAL CHARACTERISTICS. SUBSEQUENTLY, AN OPTIMAL CONTROL POLICY IS ESTABLISHED FOR AN ISOLATED ENTRANCE RAMP AND THE INTEGRATED TOTAL FREEWAY CONTROL POLICY MODELED. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1969/279/279-006.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Highway Capacity and presented at the 48th Annual Meeting. 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:
  • Brewer, Kenneth A
  • Buhr, Johann H
  • DREW, DONALD R
  • Messer, Carroll J
• Publication Date: 1969

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 70-86
• Monograph Title: Freeway traffic characteristics and control
• Serial:
  • Highway Research Record
  • Issue Number: 279
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Freeway operations; Freeways; Gap acceptance; Highway capacity; Interchange ramps; Merging traffic; Traffic control
• Old TRIS Terms: Freeway capacity; Freeway entrances and exits; Freeway ramps
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225539
• Record Type: Publication
• Report/Paper Numbers: Paper No 1
• Files: TRIS, TRB
• Created Date: Oct 21 1994 12:00AM