Method for determining left-turning forbiddance traffic limitation intersection by using floating car data

The invention discloses a method for determining a left-turning forbiddance traffic limitation intersection by using floating car data, and belongs to the field of intelligent traffic. The method comprises the following steps of: establishing a road network topology,, generating a candidate left-turning intersection in the road network topology, matching the floating car data to the road network topology, traversing the floating car data of all approach chains of each candidate left-turning intersection in the road network topology to obtain a ratio of the numbers of the floating car data matched with all approach chains of each candidate left-turning intersection, and then determining the left-turning forbiddance traffic limitation intersection according to the ratio. In order to solve the problems in the traditional traffic limitation method, the advantages of a floating car data FCD technology in the traffic information acquisition aspect are utilized to fully mine rich traffic information therein. By a large amount of calculation and analysis of floating trajectories, the urban road intersection traffic limitation information is automatically and accurately extracted.