关键词: 城市交通, 信号交叉口, 直右共用车道, 右转修正系数, 通行能力

Abstract: In view of the insufficient researches on shared throughright turn lanes capacity at signalized intersections in China, the paper investigates the traffic operation of shared throughright turn lanes and analyzes the traffic characteristics. Based on the measured data, the saturation headway of vehicle for different shift is analyzed using the Ttest statistical method. that the results show that a significant difference between the saturation headway of through and rightturn vehicles are existed. Then, a theoretic model for throughright turn lanes capacity is developed by saturation flow rate correction theory and probability methods. This study provide a theoretical basis for planning, design, transformation, traffic organization, signal timing, operations evaluation and lane setting at signalized intersections.

Key words: urban traffic, signalized intersections, shared throughright turn lanes, adjustment factor for right turns, capacity