通过对汉宜高速公路历年交通事故统计资料的分析研究 ,得出平面直线、平曲线、平面直线与曲线连接、纵坡坡度、纵坡长度、平纵组合与衔接设计、横断面设计、中央隔离设计、路侧设计等方面关于安全特性的相关规律 ,为道路安全审查程序提供技术支持 Through the analysis of the statistical data of traffic accidents over the Hani Expressway over the years, it is concluded that the straight line, the flat curve, the plane straight line and the curve connection, the longitudinal slope length, the longitudinal slope length, the combination of the longitudinal and vertical design, the cross-sectional design, the central isolation Design, roadside design and other aspects of the safety characteristics of the law for the road safety review process to provide technical support