Method for determining influence range of urban road traffic accident based on fixed detector

The invention discloses a method for determining the influence range of an urban road traffic accident based on a fixed detector, which relates to a method for determining the influence range of a traffic accident after the traffic accident happens on an urban road network completely consisting of signal-controlled crossings. The method specifically comprises the following steps: calculating the arrival rate of vehicles on an approach of a crossing; detecting the departure rate of the vehicles on the crossing; calculating the queue length based on the fixed detector; analyzing the diffusion process of congestion caused by the traffic accident; and finally determining the influence range of the traffic accident. By the invention, the real-time and accurate prediction on the influence range of the traffic accident can be achieved, thereby achieving the purpose of improving the implementary efficiency of measures for rapidly disposing the traffic accident. The method is simple and practical and has higher real-time property and accuracy.