The travel time of left-turning vehicles at signalized intersection was discussed. Under the\r\nassumption that the opposing through vehicles headway follows M3 distribution, the travel time\r\nmodel was established on the basis of gap theory and queue theory. Comparison was done with\r\nthe common model based on the assumption that the opposing through vehicles headway follows\r\nnegative exponential distribution. The results show that the model in this paper has stronger\r\napplicability and its most relative error is less than 15%. In addition, the sensitivity analysis was\r\ndone. The results show that the opposing through flow rate has significant impact on travel time.\r\nThe impact of left-turning flow rate and following headway is light when the opposing through\r\nflow rate is small, the threshold is about 0.18 veh/s. The model established in this paper can well\r\ncalculate travel time of left-turning vehicles at intersection, and the methodology may provide\r\nreference to other occasions.
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