Consequence Analysis of Left-Turn Driver's Scrambling Behavior to Traffic Efficiency at a Two-Phase Signalized Intersection

Urbanization and motorization have increased rapidly in China during the last decades, along with China's economic boom. The increasing amount of motor vehicles brings frequent congestion, crashes, pollution and other negative impacts on the metropolis. Meanwhile, aberrant driving behaviors often happen among Chinese drivers and even enhances those negative impacts. Scrambling behavior is a common aberrant driving behavior and always occurs at a two-phase signalized intersection without a left-turn signal. Some left-turn drivers will "scramble" to pass through the intersection and not yield the way to the straight flow coming from the opposite direction, which has a higher priority. Thus, they may increase the risk of crash and delay at the intersection. This paper focuses on the effect of this scrambling driving behavior on traffic efficiency. By analyzing the character of left-turn drivers' behavior and calculating the delay on the conflict point, some findings are presented: (1) The stopping time of the straight flow caused by average scrambling vehicle on the conflict point, or the average time a scrambling vehicle uses to pass through the conflict point, is linear proportional to the number of scrambling vehicles; (2) The scrambling behaviors significantly increase the delay of traffic flow and decrease the efficiency of the whole intersection. A theoretical model to estimate the delay of the straight-going vehicle on the conflict point is proposed in this study. This paper can help to understand scrambling behavior and provides some basis for the practical operating process on signalized intersections in China.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 81-89
  • Monograph Title: Challenges and Advances in Sustainable Transportation Systems

Subject/Index Terms

Filing Info

  • Accession Number: 01526984
  • Record Type: Publication
  • ISBN: 9780784413364
  • Files: TRIS, ASCE
  • Created Date: May 15 2014 3:01PM