Abstract: With the increasing number of vehicles operating in our country, various kinds of traffic accidents occur from time to time, which has brought huge losses to people's lives and property. There are many reasons for this. Among them, illegal acts (such as speeding, changing lanes at will, occupying overtaking lanes for a long time, emergency lanes, stopping at will) by drivers of operating vehicles are the important factors leading to accidents on expressways. Based on this phenomenon and reason, a high-precision positioning lane-level navigation system based on BeiDou Satellite Navigation System is studied and implemented, which can strengthen the control of driving behavior of operating vehicles, solve the traffic law enforcement problems and improve the management efficiency.

Key words: high-precision positioning, BeiDou foundation reinforcement system, three dimensional laser scanning, lane-level navigation