Development of Left Turn Operations Guidelines at Signalized Intersections

Details

• Creators:
  Yu, Lei ; Qi, Yi ; Yu, Hongxi ; Guo, Lei ; Chen, Xin
• Corporate Creators:
  Texas Southern University. Dept. of Transportation Studies
• Corporate Contributors:
  Texas Department of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Crash Data Exclusive Permissive Phasing Guidelines Highway Operations Left Turns Signalized Intersections Standardization Traffic Safety Traffic Simulation
• Publication/ Report Number:
  FHWA/TX-09/0-5840-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  November 2006-August 2008
• Corporate Publisher:
  Texas. Department of Transportation
• Abstract:
  This project developed guidelines for recommending the most appropriate left-turn phasing treatments at signalized intersections. It investigated all aspects of left-turn operations, including the mode of left-turn signal control, the sequence of left-turn phasing, and left-turn signal displays. Both the operational and safety impacts of different types of left-turn signal operations were analyzed. In the operational impact analysis, based on the results of traffic simulation, cross products of left-turn and opposing through volume (CPOV)–based criteria for selecting the left-turn signal mode between the protected-only and protected/permissive left-turn modes were developed. In the safety impact analysis, by analyzing the historical accident data collected from more than 100 intersections, the safety performances of different types of left-turn signal phasing treatments and signal displays were ranked. In addition, this project also evaluated the benefits of regional standardization of left-turn operations. It was found that the mixed application of left-turn signal operations, including signal control modes, phasing sequences, and displays, increases the risk of accidents at intersections.
• Format:
  PDF
• Funding:
  0-5840
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:5f882f96ce0c815a0489bc43d51a2ac61ad1e294cdf78eac8e3e2e2bc0d7e84ddfe7def58c83a83f51d03805fcef9df20f4a8a439aa04058c596b0ec69b11fee
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/88958/dot_88958_DS1.pdf
• File Type:
  [PDF - 7.63 MB ]