Vehicle speed, pedestrian speed, etc. According to the knowledge of mathematical modeling of traffic lights, the modeling process considers the speed of road vehicles, pedestrian speed, traffic flow, road width and other related issues according to the actual situation, collects the data of these factors, analyzes them by mathematical methods, and obtains the laws and fitting equations that affect the change of traffic lights. Mathematical modeling is to establish a mathematical model according to actual problems, solve the mathematical model, and then solve the actual problems according to the results.