应急资源布局问题是高速公路应急管理的关键。通过建立数学模型，提出一种优化高速公 路网中应急设施点布局方法。首先，通过分析高速公路网中应急需求的布局特点，依据事故发生 概率、事故影响范围和路段平均车流量确定在某个交通事故情形下需求点的应急需求。然后，基 于需求分析建立应急设施点选址模型。通过救援时间限制确定设施点的覆盖条件，选择救援时间 短、物资供给能力强的待选点建立设施点。最后，采用基于拉格朗日松弛的启发式算法对模型进 行求解。通过计算实例验证，该布局方法针对高速公路网的应急需求，保障了应急事件救援时 间，为高速应急设施点布局提供了新思路，可适用性强。

The emergency facility location is a key problem in the field of expressway emergency man⁃ agement. A method of optimizing the emergency facility location on the expressway network by the math⁃ ematical modeling was proposed. Firstly, the layout characteristics of emergency facility demand on the expressway network was analyzed, and the emergency demand under the specific traffic accident was de⁃ termined in terms of the accident probability, the accident influence scope and the average traffic flow volumes. Secondly, the emergency facility location model was established based on the demand analysis. In the emergency facility location model, the facility points′ coverage condition was determined by the rescue time limitation, and the facility points were chosen to build emergency facility within the condi⁃ tion of rapid rescue time and sufficient rescue supplies. Finally, the method of the heuristic algorithm based on the Lagrangian Relaxation to solve this model was introduced. The emergency facility location model aimed at emergency demand on the expressway network was verified to be effective and enforce⁃ able by a computational experiment, which guaranteed for the rescue time and offered a new idea for the emergency facility location.