Abstract: Based on the active collision avoidance distance model,it is assumed that the car in the current traffic conditions for safety lane change,forecast the distance between the vehicle and the target lane after the end of lane change,so as to determine the model of warning system for vehicle lateral safety warning system.By simulation,it is proved that the lateral safety warning model established by this method is correct.

Key words: active collision avoidance distance model, vehicle lateral safety warning model, distance prediction after lane change