Field testing and implementation of dilemma zone protection and signal coordination at closely-spaced high-speed intersections : executive summary report.

Details

• Creators:
  Pant, Prahlad D. ; Cheng, Yizong ; Rajagopal, Arudi ; Kashayi, Nagaraju
• Corporate Creators:
  University of Cincinnati. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Ohio. Dept. of Transportation. Office of Research and Development ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Offsets (Traffic signal timing)
  • Traffic signal timing
  • Electronic traffic controls--Research--Ohio
• Publication/ Report Number:
  FHWA/OH-2005/006
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Edition:
  Executive summary report.
• Corporate Publisher:
  Ohio. Dept. of Transportation. Office of Research and Development
• Abstract:
  The area close to a signalized intersection, ; called the dilemma zone, poses a high accident ; potential for the driver in stopping safely during the ; yellow interval or in proceeding through the ; intersection before the beginning of red. Generally, ; the location of the driver on the intersection ; approach and the speed of the vehicle influence the ; driver’s decision to stop or proceed when he sees ; the green signal changing to yellow. The clearing ; distance is the distance the vehicle travels between ; the time the signal changes to yellow to the time the ; signal changes to red. The stopping distance is the ; distance traveled by the vehicle between the time ; the signal changes to yellow to the time when the ; vehicle actually comes to rest. If the stopping ; distance is greater than the clearing distance, and ; the vehicle is placed in between them, a dilemma ; zone is formed. In this situation, neither the distance ; to the intersection is adequate for stopping nor is the ; signal interval adequate for clearing the ; intersection. The driver is in a potentially hazardous ; situation whereby, if he tries to cross the ; intersection at the onset of red interval, he may end ; up in an angle accident with the cross street traffic ; or if he accelerates through yellow, he may end up ; in a rear-end collision. The uncertain situation in a ; dilemma zone can potentially lead to rear-end or ; right angle collisions.
  More +
• Format:
  PDF
• Funding:
  14754(0)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17510/dot_17510_DS1.pdf
• File Type:
  [PDF - 41.37 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a76126266370d763e006e76a681f4ae71ea0f66a1b1dd7224c61824e68fb9774