Planning methods and effect analysis of advance right-turn

Calculating models of passing capacity for fixed and variable weaving area lengths on advance right-turn were given by using gap acceptance theory and probability theory, and calculating models of increasing capacity by prolonging weaving areas were obtained, the application conditions of planning methods on advance right-turn were put forward, the running effects of motor vehicles were compared with the index of vehicle average delay in the weaving areas, and the capacities of left-turn and straight vehicles were analyzed by using Webster signalized timing methods at advance right-turn intersection.Analysis result shows that the capacities of straight and left-turn vehicles at intersection increase when advance right-turn planning method is adopted; when advance right-turn vehicles satisfy passing capacity, traffic conflict area can be decreased by using advance right-turn planning method, otherwise, prolonging weaving areas can be used to add passing capacity and decrease the average delays of right-turn motor vehicles.