Traffic overflow inhibition method based on high altitude video information

The invention relates to a traffic overflow inhibition method based on high altitude video information. Compared with the prior art, the traffic overflow inhibition method based on the high altitude video information overcomes the defect that no automation inhibition method for solving the problem of traffic overflow exists in the prior art. The traffic overflow inhibition method based on the high altitude video information includes following steps: erecting a high altitude camera, and communicating the camera and a signal controller with an information center through a wired network or a wireless network; performing distance calibration on a camera image and actual distance of a road; setting overflow queuing length threshold value; calculating saturation flow and traffic capacity of a lane; calculating the maximum queuing length and saturation in each signal cycle of the lane; judging out a mapping relation of average increasing velocity and the saturation of the queuing length; forecasting a cycle reaching the overflow length threshold value; adjusting matching time of upstream and downstream signal lamps. The traffic overflow inhibition method based on the high altitude video information can grasp increasing and dissipating rules of the queuing length before the traffic overflow occurs, and forecasts an occurring cycle of the traffic overflow.