Characterize dynamic dilemma zone and minimize its effect at signalized intersections : December 26, 2008.

Details

• Creators:
  Wei, Heng
• Corporate Creators:
  University of Cincinnati. Department of Civil and Environmental Engineering
• Subject/TRT Terms:
  Dilemma Zone Interchanges And Intersections Roads--Interchanges And Intersections--Safety Measures Signalized Intersections Traffic Safety Yellow Interval (Traffic Signal Cycle)
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Corporate Publisher:
  Ohio Transportation Consortium
• Abstract:
  Dilemma zone at signalized intersection has been recognized as a major potential causing rearend
  
  crashes, and has been widely studied by researches since it was initially proposed as the
  
  GHM model in 1960. However, concepts conventionally defined to represent yellow phase
  
  dilemma lack integrity. This research conducts a comprehensive literature review with attempt to
  
  clarify the interrelationship among dilemma zone, option zone, and indecision (decision) zone,
  
  and to develop a heuristic framework to present the contributing factors in dilemma zone
  
  modeling. A new method for modelling the locations and lengths of the dilemma zone using
  
  video-capture techniques and vehicle trajectory data is presented in this report. First, dilemma
  
  zone is mathematically modeled based on the literature review. Then, field-observed trajectory
  
  data extracted by the video-capturing-based approach are used to calibrate the contributing
  
  factors involved in the dilemma zone models. The high accuracy of the time-based trajectory
  
  data has significantly enhanced the accuracy of the calibrated dilemma zone models. Two sets of
  
  trajectories are explored for calibrating the dilemma zone contributing factors. One is concerned
  
  with maximum yellow-onset safe passing distance and minimum yellow-onset stopping distance.
  
  The other is concerned with Xth percentile yellow-onset passing distance and stopping distance
  
  for the prevailing travel behaviors. The latter alternative actually precludes “too conservative”
  
  and “too aggressive” behaviors in response to yellow indications.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:d619ccb29c7961e7ce0daa094e57cdbb74213eba46cee5c4998e3b34da8bee62
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17193/dot_17193_DS1.pdf
• File Type:
  [PDF - 2.75 MB ]