Driving behavior during the signal switching interval is crucial to the safety of urban traffic, this paper investes the microscopic driving behavior and“go/stop”decision which are affected by the green signal countdown (GSC). Firstly, a single- blind experiment is conducted using the eight- degree- of- freedom driving simulator, and the approach velocity, perception-reaction time, and deceleration of vehicles is obtained. Secondly, the microscopic driving behavior from entering the intersection to the stop line is described in detail. Thirdly, a random- effect Logistic model is built to describe the“go/stop”decision, and the explanatory variables in this model included traffic parameters and drivers’ individual characteristics. The results show that, when entering the intersection, the vehicle will first slow down , then speed up, and then slow down again, moreover, the acceleration usually appears at a distance of 30~40m from the stop line, this shows that GSC and the early stage yellow light has an obvious urging effect on drivers. Secondly, vehicle’s velocity, distance from the stop line, driver’s age and sex has a significant influence on the "pass/stop" decision. The random- effect Logistic model can express the factors not in the model and the heterogeneity of intersections and drivers better.
