Safety and efficiency impact of pedestrian-vehicle conflicts at non signalized midblock crosswalks based on fuzzy cellular automata
Safety and efficiency impact of pedestrian-vehicle conflicts at non signalized midblock crosswalks based on fuzzy cellular automata
复制标题
基于模糊元胞自动机的无信号中段人行横道行人与车辆冲突的安全性和效率影响
DOI：
10.1016/j.physa.2021.125871
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
岑学楷
中科院分区：
文献类型：
--
作者：
李传耀;刘诗昆;岑学楷
在人口密集的城市，尤其是东南亚地区，过街天桥非常普遍。为了规范未经许可的过街行为，采用了斑马线（MZC）来促进驾驶员对行人的让行行为。有必要建立明确的MZC建设指南，以帮助控制非法穿越，以及分析现有MZC的性能。本文建立了一个模糊元胞自动机（FCA）模型，分析了非信号控制下机动车与车辆相互作用对安全性和效率的影响，明确了驾驶员个体的决策过程。在该模型中，通过实地调查标定模糊推理系统中冲突区间隙和行人速度的隶属函数，以推理出各驾驶员在人行横道前的过滤决策输出。此外，通过引入碰撞时间差（TDTC）和冲突引起的减速发生率（DOC）等安全性和效率指标，FCA模型能够评估不同服从驾驶员比例和交通流下的车-车冲突的安全性和效率影响。最后，根据FCA模型和国家交通信号灯设置指南，推导出在中间街区建设MZC的最小行人流量。
Midblock crossing is very common in the high populated urban cities, especially in Southeastern Asia. To regulate unauthorized midblock crossing, Midblock Zebra Crosswalk (MZC) is applied to promote yielding behavior of drivers to pedestrians. It is necessary to set up a clear guidance for constructing MZC to help regulate the unlawful crossing, as well as analyzing the performance of existing MZCs. In this paper, a Fuzzy Cellular Automata (FCA) model is developed to analyze the safety and efficiency impact of pedestrian–vehicle interactions at non signalized MZCs, which explicitly explores the decision making process of individual drivers. In the proposed model, membership functions of conflict area gap and velocity of pedestrian in the fuzzy inference system are calibrated with field survey, in order to reason the output of each driver’s filtering decision in front of the crosswalk. Furthermore, by employing safety and efficiency indicators, including Time Difference to Collision (TDTC) and Deceleration Occurrences caused by Conflicts (DOC), the FCA model is capable of evaluating safety and efficiency impact of pedestrian–vehicle conflicts under different proportions of obedient drivers and traffic flows. Finally, we deduce the minimum pedestrian flow for constructing MZC in the midblock from the FCA model and national guideline of setting traffic lights in China.