PROGRESS IN GEOGRAPHY ›› 2022, Vol. 41 ›› Issue (10): 1956-1968.doi: 10.18306/dlkxjz.2022.10.014

• Reviews • Previous Articles     Next Articles

Progress of research on the mechanism of impact of urban road network characteristics on traffic accidents

XIE Bo(), XIAO Yangmou*()   

  1. School of Urban Design, Wuhan University, Research Center for Hubei Habitat Environmental Engineering & Technology, Wuhan 430072, China
  • Received:2022-02-28 Revised:2022-08-13 Online:2022-10-28 Published:2022-12-28
  • Contact: XIAO Yangmou;
  • Supported by:
    National Natural Science Foundation of China(41971179);Humanity and Social Science Foundation of Ministry of Education of China(17YJC840045)


With the rapid development of motor traffic, urban traffic safety problems are becoming increasingly serious. As a key factor influencing the characteristics of regional traffic flow and travel behavior, the characteristics of urban road network have an important impact on the frequency, type, and spatial distribution of regional traffic accidents. Based on the theoretical analysis of the relationship between urban built environment and traffic accidents, this article summarized the mechanism of impact of urban road network characteristics on traffic accidents from two aspects: road network patterns and geometric-topological characteristics. The potential mechanism of impact of urban road network characteristics on traffic accidents was analyzed by exploring the relationship between urban road network and travel behavior. Existing studies indicate that there are differences in spatial scale effects on the type, frequency, and severity of traffic accidents caused by road network patterns such as grid-iron, warped parallel, and loops-lollipops, as well as road network topology indicators such as centrality and connectivity. Furthermore, reasonable geometric characteristics of road network such as intersection density, road network density, and block density play an important role in improving traffic safety. Future research needs to further characterize the structure, function, and other characteristics of road network using complex network theory, and to provide in-depth analyses on the driving mechanism and non-linear effects of complex road network characteristics on traffic accidents from the perspective of travel behavior by controlling the effect of residential self-selection. Future research also needs to consider the potential interaction between road network characteristics and the built environment on traffic accidents.

Key words: traffic accident, road network, travel behavior, complex network