Safety Evaluation for Intergreen Intervals at Signalized Intersections Based on Probabilistic Method

This study presents a probabilistic safety estimation approach based on traffic conflict technique. The study aims to investigate the impacts of the German signal control policy and intergreen design method on safety during intergreen intervals at signalized intersections in Japan. To facilitate application of the policy, the uncertainty of input variables and of safety itself, indicated by the postencroachment time, was analyzed first by means of field data collected at 12 typical intersections in Japan and Germany. A few case studies were then examined with Monte Carlo simulation. The results indicated that safety during the intergreen interval and its reliability might significantly drop if intergreen times were simply changed from the values based on the Japanese method to the values based on the German method without supplementary countermeasures. However, safety as well as reliability can be maintained if the Japanese control policy is completely replaced with the German one.

• Record URL:
  https://doi.org/10.3141/2128-23
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Safety+Evaluation+for+Intergreen+Intervals+at+Signalized+Intersections+Based+on+Probabilistic+Method&author=K.+Tang&author=H.+Nakamura&publication_year=2009
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309142601
• Authors:
  • Tang, Keshuang
  • Nakamura, Hideki
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 226-235
• Monograph Title: Traffic Signal Systems 2009
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2128
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Case studies; Data collection; Green interval (Traffic signal cycle); Monte Carlo method; Signalized intersections; Traffic conflicts; Traffic safety; Traffic signal control systems
• Uncontrolled Terms: Field data; Postencroachment time; Probabilistic methods
• Geographic Terms: Germany; Japan
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control;

Filing Info

• Accession Number: 01123115
• Record Type: Publication
• ISBN: 9780309142601
• Report/Paper Numbers: 09-3856
• Files: TRIS, TRB, ATRI
• Created Date: Mar 13 2009 6:36AM