INTEGRATED REAL-TIME RAMP METERING MODEL FOR NONRECURRENT CONGESTION: FRAMEWORK AND PRELIMINARY RESULTS

An integrated real-time ramp metering model for nonrecurrent freeway congestion among link flows has been developed and tested in this study. The core concept of the proposed algorithm is to capture the dynamic traffic state evolution with a two-segment linear flow-density model. To be implemented in real time, an effective solution algorithm has been proposed for determining the time-varying metering rates. The entire algorithm has also been integrated with INTRAS, the most well-known freeway simulation model, for conducting simulation experiments. Preliminary research results indicate that the proposed integrated control model is promising because its effectiveness increases with the severity of accidents and the level of congestion. The model execution time is also sufficiently short for potential real-time operations.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1994/1446/1446-009.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=INTEGRATED+REAL-TIME+RAMP+METERING+MODEL+FOR+NONRECURRENT+CONGESTION%3A+FRAMEWORK+AND+PRELIMINARY+RESULTS&author=G.+Chang&author=J.+Wu&author=S.+Cohen&publication_year=1994
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309060524
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1446, High-Occupancy-Vehicle Systems and Freeway Operations. 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:
  • Chang, Gang-Len
  • Wu, Jifeng
  • Cohen, Stephen L
• Publication Date: 1994

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 56-65
• Monograph Title: High-occupancy-vehicle systems and freeway operations
• Serial:
  • Transportation Research Record
  • Issue Number: 1446
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Algorithms; Freeways; Highway traffic; Nonrecurrent congestion; Ramp metering; Real time control; Real time data processing; Traffic simulation
• Old TRIS Terms: Freeway traffic
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00672526
• Record Type: Publication
• ISBN: 0309060524
• Files: TRIS, TRB, ATRI
• Created Date: Jan 10 1995 12:00AM