Abstract: In this paper, predicted the time saving of traffic according to the traffic property of the automobiles passing the grade crossing. Based on the method of the moving investment-pay time estimated the ecconomic loss for twenty six typical grade crossings investigated in five proviuces of China and obtanied the equations of the regression of ecconomic efficiancy, highway and railway tnaffic volume by using the method of gradual regression analysis. These equations are the setting condition of highway and railway Cross-over.

摘要： 本文根据车辆通过平交道口时行车的特性计算了行车的时间延误对们国五省调查的26个典型平交道口用动态的投资回收期方法评估了它们的经济损失,并由回归分析得到经济效益、公路交通量和铁路交通量三者关系的数学模型及函数曲线。这些数学方程就是公路与铁路立体交叉的设置条件。