Optimization of Variable Speed Limit Approaching Long Freeway Tunnel

The traffic approaching the entrance of a long freeway tunnel raises a serious congestion before the tunnel frequently during high traffic loading period. For mitigating the congestion on the freeway bottle neck section, the variable speed limit is a successful countermeasure on the other freeway. In this paper, an optimization model based on macroscopic traffic models and continuity model-based model for creating variable speed-limit is developed and implemented according to the traffic characteristics of the traffic flow on a freeway with 12.9km long tunnel. By using simulation, the performance under with and without speed limit control is compared. Through the variable speed limit control, the total throughput will increase by 19.5%, average travel time will decrease by 8.44%. It shows that this model can indeed improve the performance of the freeway. Then, a realization of the variable speed limit on the field test is then expected

• Availability:
  • Find a library where document is available. Order URL: http://itswc.confex.com/itswc/WC2011/webprogram/start.html
• Supplemental Notes:
  • Abstract reprinted with permission from Intelligent Transportation Society of America.
• Corporate Authors:

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036
• Authors:
  • Hsu, Tien-Pen
  • Lu, Yan-Cong
  • Lin, Yu-Jui
• Conference:
  • 18th ITS World Congress
  • Location: Orlando Florida, United States
  • Date: 2011-10-16 to 2011-10-20
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Maps; References; Tables;
• Pagination: 12p
• Monograph Title: 18th ITS World Congress, Orlando, 2011. Proceedings

Subject/Index Terms

• TRT Terms: Freeways; Traffic congestion; Traffic control; Traffic flow; Traffic models; Traffic simulation; Variable speed limits
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01447782
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 28 2012 4:58PM