Analysis of Signalized Intersection U-Turn Design Based on the Micro-Simulation Study

Investigations indicate that direct-left-turns (DLT) at signalized intersections create many conflicts and disturbances. A U-turn is a traffic organization method to improve the safety of the left turning vehicles. There are two forms of U-turns, depending on the location of U-turn bay. This paper researches the optimal location of the U-turn bay, taking a typical signalized intersection as an example, and compares the effectiveness of the two cases. Based on the microscopic traffic simulation software TSIS, this paper makes a contrast of the Travel Time Total, Speed Average, as well as Speed Variance of the two forms of U-turn. According to the analytical and simulation results, it can be found that the U-turn is more effective than the DLT, and the First form is more prominent in increasing the speed average and lowering the speed variance in the particular situation tested.

• Record URL:
  https://doi.org/10.1061/9780784412442.230
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784412442
• Supplemental Notes:
  • © 2012 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Lu, Linjun
  • Wei, Daimei
  • Lu, Jian John
  • Li, Zhengming
• Conference:
  • Twelfth COTA International Conference of Transportation Professionals
  • Location: Beijing , China
  • Date: 2012-8-3 to 2012-8-6
• Publication Date: 2012-8

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 2266-2277
• Monograph Title: CICTP 2012: Multimodal Transportation Systems—Convenient, Safe, Cost-Effective, Efficient

Subject/Index Terms

• TRT Terms: Left turns; Microsimulation; Signalized intersections; Traffic conflicts; Turning lanes; U turns
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01505201
• Record Type: Publication
• ISBN: 9780784412442
• Files: TRIS, ASCE
• Created Date: Jan 27 2014 11:02AM