Development Sub-Area Design and Offset Control Method Focused on Fluctuated Traffic Flow

In 1995, traffic signal control systems in Japan were changed from a pattern selection control method to an adaptive control method for cycle-length and split control; these changes have decreased traffic congestion in urban road networks. The pattern selection control methods in use do not incorporate real time data. This paper reports on the development of Real Time Sub-area and Offset Control (RSOC) which can be implemented in traffic signal controls. The authors emphasize that the phenomenon of traffic flow fluctuation between two sub-areas controlled by different cycle-lengths should be considered for developing RSOC, because the simulator results stated that fluctuated flow increases delay and stoppages on the street. This flow is referred to here as “fluctuated traffic flow”. The authors focus on the development of RSOC with fluctuated traffic flow. Results of field tests of offset control on Ome-Kaido Street in Tokyo (conducted in April 2007) showed that average delay time was improved 5.7% on the street and the ratio of vehicles arriving as the signal changed decreased 40%. The authors conclude that these methods are effective to decrease delays and to improve street safety.

• Corporate Authors:

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036
• Authors:
  • Ohira, Shotaro
  • Sakakibara, Hajime
  • Jinno, Masayuki
  • Usami, Tsutomu
• Conference:
  • 15th World Congress on Intelligent Transport Systems and ITS America's 2008 Annual Meeting
  • Location: New York NY, United States
  • Date: 2008-11-16 to 2008-11-20
• Publication Date: 2008

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: 10p
• Monograph Title: ITS Connections: Saving Time. Saving Lives

Subject/Index Terms

• TRT Terms: Intelligent transportation systems; Real time information; Signalized intersections; Traffic delays; Traffic flow; Traffic signal control systems; Traffic signal controllers; Traffic signal intervals; Traffic signal phases
• Geographic Terms: Tokyo (Japan)
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01140779
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 29 2009 8:57AM