混行非机动车道被超车自行车骑行安全评价

Safety Evaluation of Overtaken Bicycle on a Shared Bicycle Path

摘要:

研究基于上海市混行非机动车道92起助动车超越自行车事件，发现超车事件中被超自行车的行驶阶段包括正常行驶阶段，受超车影响阶段，以及调整骑行状态的过渡阶段.在受超车影响阶段，被超自行车的加速度波动幅度将增大，而波动均衡性将减小.同时，受超车影响阶段的起始时间和持续时间，与超车事件类型，以及车辆行驶方向（前进方向和侧向方向）有关.研究还发现平均每次邻贴超车事件中超车助动车对被超自行车骑行安全的影响，是自由超车事件的5倍.提出了基于自由超车和邻贴超车事件数的混行非机动车道被超自行车骑行安全评估方法，能有效反映骑行者的真实感受，模型理论值和骑行人实测值匹配度达87.05%.

Abstract:

This research analyzes bicycle maneuvers in 92 escooterpassingbicycle events collected from two shared bicycle paths in Shanghai. The results show that an overtaken bicyclist may experience three phases in a passing event: a normal riding phase, an overtaking effect phase in which the bicyclist is under the escooter’s pressure, and a transitional phase of adjusting the bicycle’s maneuvers. In the overtaking effect phase, the bicycle’s acceleration will fluctuate more sharply but less uniformly than in the normal riding phase. The start time and the length of the overtaking effect phase differ between different types of passing events, and they also differ based on the bicycle’s longitudinal and lateral movements. A safety evaluation model is proposed to assess the overtaken bicycle’s safety in these events. The model indicates that, on average, the negative effect of an adjacent passing event on the overtaken bicycle’s safety is five times as much as that of a free passing event. A field test shows that the model can accurately reveal bicyclists’ actual sense of safety during the overtaking, with an accuracy of 87.05%.