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在回顾国内外对互通式立交的安全性评价方法的基础上,针对立交线形的复杂性,提出了基于微观交通仿真软件CORSIM的安全性评价方法。不同于回归分析方法,仿真分析方法以精确的几何建模以及对交通量和交通组成的考虑,显示了其独特优势。借助某高速公路的互通式立交安全性评价,提出了仿真分析法的分析过程,并提出了以速度变化率和桩号-速度变化率图来评价立交的安全性。通过结果分析,论证了基于交通仿真的安全性评价方法是可行的。
On the basis of reviewing the safety assessment methods of interchange at home and abroad, a safety evaluation method based on microscopic traffic simulation software CORSIM is proposed to deal with the complexity of overpass alignment. Unlike the regression analysis method, the simulation analysis method shows its unique advantages with accurate geometric modeling as well as consideration of traffic volume and traffic composition. With the safety evaluation of an expressway interchange, the analysis process of the simulation analysis method is proposed and the safety of the interchange is evaluated by the rate of change of speed and the station-velocity change rate chart. Through the analysis of the results, it is proved that the safety evaluation method based on traffic simulation is feasible.