Method for obtaining everage speed of city road section traffic flow

An urban road traffic flow average speed acquisition method, which belongs to the field of intelligent transportation technology. The present invention comprises: 1) to create an intersection ID - road name correspondence table; 2) Identifying the processing error data; 3) average speed acquisition: the average link travel time is the average time for exercise and the average waiting time sum, using the link length Save queues of vehicles at intersections to obtain a vehicle traveling the length of the average sense; the road is divided into urban expressways, trunk roads, secondary roads and slip to obtain a desired speed different levels of road through field testing approach, by average vehicle with a road length divided by the average level of the desired speed travel time; the queuing theory M / M / 1, and acquires the average waiting time; Finally, according to the length of the road, the average travel time and the average waiting time to obtain the average road speed. The present invention has a simple calculation, fast speed and high reliability.