Interchange type overpass security estimation method

The invention discloses an interchange type overpass security estimation method. The method includes the following steps that: an interchange type overpass is divided into a high-speed basic section, a ramp and a collecting and distributing channel; the accident prediction model of the high-speed basic section, the accident prediction model of the ramp and the accident prediction model of the collecting and distributing channel are constructed; the accident prediction model of the interchange type overpass is obtained according to the accident prediction model of the high-speed basic section, the accident prediction model of the ramp and the accident prediction model of the collecting and distributing channel; and the security of the interchange type overpass is estimated according to the accident prediction model of the interchange type overpass. With the method adopted, the security of the interchange type overpass can be estimated. 本发明公开了种互通式立交安全性估计方法，包括与以下步骤：将互通式立交分为高速基本路段、匝道及集散道，再构建高速基本路段的事故预测模型、匝道的事故预测模