Guidance Method of the Variable Lane

In order to seek the variable lane's guidance method,this paper proposed a pre-signal guidance method based on the double paking line.First,the double parking line layout method was studied,and the distance between main singal and the pre-signal was determined.Then,the signal timing relation between main singal and the pre-signal was analyzed.The relation between main singal cycle and the pre-signal cycle,the timing plan of pre-signal in the process of lane transition,and the impact of the distance between the double parking lines on signal timing were also obtained.