交叉口电动自行车交通流对其左转释放膨胀特性的影响

The Influences of E-bike Traffic Flow at Intersections on Its Left Turn Release Expansion Characteristics

本文以平面信号交叉口左转电动自行车膨胀特性为研究对象,对电动自行车左转过程中膨胀度与交通流参数之间的关系进行研究.在对盐城市具有专用左转相位的典型信号交叉口进行视频数据采集的基础上,首先,对单个信号周期左转绿灯时间的左转电动自行车车流膨胀度进行了定义;然后,对单位膨胀度左转电动自行车流量、左转电动车车流密度、左转电动车车辆速度等左转电动车交通参数进行了界定与统计描述;最后,通过构建左转电动自行车车流膨胀度与左转电动车交通参数间的数学模型,量化分析了交叉口电动自行车交通流特性对其膨胀度的影响.

This paper takes the expansion characteristics of left-turning e-bikes at signalized intersections as the research object and studies the relationship between the expansion degree and three parameters of e-bike traffic flow during the left-turning process.Based on the video data of typical signalized intersections with dedicated left-turn phases in Yancheng City,the left-turn e-bike traffic expansion degree for a single signal cycle left-turn phase was defined first.Then,three left-turn e-bike traffic parameters,namely left-turn e-bike flow per unit expansion degree,left-turn e-bike traffic density,and left-turn e-bike speed,were introduced and statistically described.Finally,the influences of characteristics of e-bike traffic flow on its left-turn expansion degree were quantitatively analyzed by constructing mathematical models among left-turn e-bike traffic expansion and left-turn e-bike traffic parameters.