The invention relates to an intersection
signal timing optimization method based on a dynamic
saturation flow rate. The method comprises the following steps: firstly, carrying out refined analysis ontraffic flow release characteristics of a high-load intersection, and determining the maximum release flow rate and duration of five stages; secondly, proposing a calculation model of the total loss time of the intersection, and taking the calculation model as an optimization target of high-load intersection
signal timing; and then, constructing an optimization model of the
signal period and the
green light based on the optimization indexes, so that the optimal signal period and the optimal
green light duration under the condition are more accurate. According to the method, the dynamic saturation flow rates of the intersection entrance lane in different time periods can be accurately calculated according to the parameters such as the length, the
traffic volume and the acceleration of the intersection channelization section, the vehicle release rule in the intersection
green light period is truly displayed, and the optimal period and the optimal green light time are calculated accordingly. According to the method, the problem of
cycle time surplus caused by the fact that a
saturation flow rate fixed value is adopted in traditional timing model calculation in a high-load state can besolved.