随着我国城镇化与机动交通的快速发展，交通事故带来的城市安全问题日益严峻。土地利用所蕴含的功能结构特征与出行行为存在密切关联，直接影响交通事故的发生与时空分布。然而，现有交通事故的驱动机理研究普遍认为交通流量和速度是其决定因素，忽略了土地利用与交通系统的动态匹配关系及其对出行行为和交通事故的重要影响。本项目以武汉市为例，在城市交通事故及其影响因素时空特征测度的基础上，通过构建城市土地利用与交通系统的关系框架，分析土地利用对出行行为的影响，进而深入解析影响交通事故的中介变量和土地利用驱动变量的时空特征；在此基础上运用广义结构方程模型构建城市土地利用、中介变量与交通事故的多层次关系模型，系统分析城市土地利用对交通事故的作用机制，并探讨交通安全导向的城市土地利用模式与调控策略。本项目将出行行为视角融入交通事故驱动机理的研究，为优化城市土地利用和调控交通事故风险提供理论与方法支撑。

With the rapid development of urbanization and motorized transportation in China, the urban security problems brought by traffic crashes are becoming more and more serious. The functional and structural characteristics of urban land use are closely related to travel behavior, thus affecting the occurrence and spatial-temporal distribution of traffic crashes. However, most of the existing research on the driving mechanism of traffic crashes emphasizes the determining role of traffic volume and speed, ignoring the important influence of the dynamic matching relationship between land use and transportation system on travel behavior and traffic crashes. Taking Wuhan City as an example, based on measuring the spatial-temporal characteristics of traffic crashes and related factors, this research analyzes the impact of land use on travel behavior by constructing the relationship framework between urban land use and transportation system, and deeply identifies the spatial-temporal characteristics of mediator variables and land use variables affecting traffic crashes. Moreover, the general structural equation model is employed to establish the multilevel relationship model between urban land use, mediating variables and traffic crashes. Finally, the mechanism of traffic crashes affecting by land use is systematically analyzed, and traffic-safety-oriented urban land use model is constructed. This project integrates the travel behavior into the research on the driving mechanism of urban traffic crashes, and provides theoretical and methodological support for optimizing the land use layout and regulating the risk of traffic crashes.