基于时空消耗法的信号交叉口行人通行能力

为计算信号交叉口行人通行能力,提出时空消耗的方法.采用摄像法和人工测量法对北京中关村大街北四环和黄庄信号交叉口进行观测,采集数据包括交叉口人行横道长度、宽度、行人绿灯时间、行人步行时间、行人占用空间等,得到交叉口的时空资源并计算行人最小平均时空消耗,从而推算出人行横道的通行能力.2个交叉口的模型计算结果与实际观测数据误差分别为11.0%和5.8%.其对比分析结果表明,基于时空消耗方法的行人通行能力模型能够应用于交叉口的规划设计和控制管理.

Pedestrian Crossing Capacity at Signalized Intersections Based on Time-Space Occupancy

To calculate pedestrian crossing capacity at signalized intersection,a time-space occupancy method is proposed.Two signalized intersections in Beijing,located at Zhongguancun Sreet with North 4th Ring Road and Huangzhuang Street,were investigated by video and manual survey.The data include length and width of intersection,green time for pedestrians,walking time in intersection,and space occupancy of pedestrians.Pedestrian crossing capacity was calculated by time-space resources and minimum average pedestrian timespace occupancy.Error of the model results and field data were only 11.0% and 5.8% for the 2 intersections.Comparison results show that capacity model formulated based on time-space occupancy can be applied for intersection planning,design,control and management.