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:
  • Signalized intersections
  • Interchanges and intersections
  • Traffic safety
  • Dilemma zone
  • Yellow interval (Traffic signal cycle)
  • Signalized intersections
  • Roads--Interchanges and intersections--Safety measures
  • Traffic safety
• 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.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17193/dot_17193_DS1.pdf
• File Type:
  [PDF - 2.75 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:d619ccb29c7961e7ce0daa094e57cdbb74213eba46cee5c4998e3b34da8bee62