Left-Turn Spillback Probability Estimation in a Connected Vehicle Environment

At intersections in which the left-turn bay does not have sufficient length or the left-turn volume is relatively high, left-turn vehicles may spill back and block the adjacent through traffic. This paper aims to develop quantitative measures of the left-turn spillback, and by using the results on spillback probability, develop a suitable signal control strategy. We first develop an improved queue length estimation method for vehicles in the left-turn bay based on Comert and Cetin’s general queue length estimation method with connected vehicles, after which we propose a probabilistic model to measure the left-turn spillback probability at an intersection in a connected environment. The model accuracy is validated with results from microscopic traffic simulation. The effect of bay length is also studied. In the end, a signal control demonstration is presented to show the efficiency of the proposed method in signal control.


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  • Accession Number: 01701660
  • Record Type: Publication
  • Report/Paper Numbers: 19-01000
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 25 2019 10:52AM