Study of vehicle-cross action model for unsignalized intersection based on dynamic game

On the basis of relation between driver´s decision when vehicle-cross action is done in the unsignalized intersection, the driver´s decision on minor time and space scale is analyzed, and the expression for safety factors and speed factors for traffic conflict vehicles in the unsignalized intersection is put up, then the utility function for vehicle-cross action is put up too. With these work, the model of driver vehicle-cross action in the unsignalized intersection is built up with dynamic game theory, and the Nash equilibrium for dynamic game process is analyzed. At last, the game model is verified by simulation, result shows that the game model is able to reflect the development result of traffic conflict under different condition, and it is logical to study driver action using dynamic game theory.