Nowadays the importance of traffic safety issues has become increasingly prominent. The intersection in road traffic safety is one of the key points. The displaced left-turn intersection is a new type of plane intersection proposed to effectively reduce the conflict at the intersection of planes and improve the traffic capacity. However, at present, China has only built a displaced left-turn intersection in Shenzhen, and there is still little research on the left-turn drift plane intersection. Therefore, further research on the displaced left-turn intersection is necessary. This paper is mainly about the traffic organization of the displaced left-turn intersection and comparing it with the traditional cross-shaped plane. Then simulates the traffic at the intersection of planes in various traffic environments (including free flow, slightly disturbed traffic, and large traffic congestion) by establishing a Vissim traffic simulation model that crosses the cross-shaped plane crossing and the left-turn drift plane. And using the comparison of vehicle delay, number of stops, driving time and other indicators to propose a situation suitable for the construction of the left-turn drift lane plane crossing. Finally, the Vissim system simulation model is used to simulate the situation when the distance of the advance signal control position of the displaced left-turn intersection changes at the slightly disturbed traffic. The vehicle delay and queue length indicators are selected, and the relationship between the set distance and the vehicle delay and queue length is established as the evaluation. At the same time, the reasonable distance range of the advance signal arrangement is proposed in combination with the construction cost. Keywords: left turn drift plane intersection, use condition, system simulation, reasonable distance

CICTP