Journal of South China University of Technology(Natural Science Edition) ›› 2025, Vol. 53 ›› Issue (11): 112-121.doi: 10.12141/j.issn.1000-565X.240592

• Intelligent Transportation System • Previous Articles     Next Articles

Hotspot Segments Identification of Collisions Between Electric Vehicles and Pedestrians/Non-Motor Vehicles

YANG Miaoyan1, DONG Chunjiao1, XIONG Zhihua1, ZHUANG Yan2, XU Bo1   

  1. 1.School of Traffic and Transportation,Beijing Jiaotong University,Beijing 100044,China
    2.China Center for Information Industry Development,Beijing 100846,China
  • Received:2024-12-20 Online:2025-11-25 Published:2025-06-18
  • Contact: 熊志华(1979—),女,博士,副教授,主要从事交通安全可靠性、交通规划研究。 E-mail:zhhxiong@bjtu.edu.cn
  • About author:杨妙言(2002—),女,博士生,主要从事交通安全、交通出行与规划研究。E-mail: 24110253@bjtu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(72371017)

Abstract:

To explore in-depth the spatiotemporal distribution characteristics of collisions between electric vehicles and vulnerable road users, this paper proposes a method for identifying spatiotemporal hotspot segments of collisions between electric vehicles and pedestrians/non-motor vehicles. First, based on the collision data involving electric vehicles and pedestrians/non-motor vehicles, the analytic hierarchy process is employed to determine the weights of the influencing factors, and a weighted network kernel density estimation method is employed to reveal the spatial clustering of traffic accidents. On this basis, the density peaks clustering (DPC) algorithm is utilized as a spatial clustering model for accidents, and a spatiotemporal-DBSCAN (ST-DBSCAN) model is constructed to incorporate the temporal dimension, thereby accurately characterizing the spatiotemporal distribution characteristics of collision accidents between electric vehicles and pedestrians/non-motor vehicles. Finally, an empirical study is conducted using the electric vehicle accident data from a city over 11 consecutive months. The results indicate that the collisions between electric vehicles and pedestrians/non-motor vehicles exhibit 3 temporal peaks, differing from the traditional bimodal characteristic observed in traffic accidents, while spatially demonstrating localized clustering characteristics. For identifying spatial hotspot segments, as compared with the optimal values of DBSCAN, OPTICS and Mean Shift algorithms, DPC algorithm shows improvements of 42.9%, 74.5% and 11.1% in terms of silhouette coefficient, Davies-Bouldin index (DBI) and Calinski-Harabasz Index (CHI), respectively. For identifying spatiotemporal hotspot segments, under similar DBI conditions, ST-DBSCAN algorithm achieves silhouette coefficient and CHI values that are 2.25 times and 57.3% higher, respectively, than the optimal values of ST-OPTICS, ST-DPC and ST-Mean Shift algorithms.

Key words: electric vehicle, pedestrian/non-motor vehicle collision, spatio-temporal distribution characteristic, accident hotspot segment identification, clustering algorithm

CLC Number: