高速公路出口匝道交通安全评价方法研究

在大量现场踏勘的基础上，文章明确了出!zr匝道的交通安全评价方法和流程，从几何安全、设施安全、交通管理与控制3个方面。构建了出口匝道的交通安全评价指标体系，采用专家问卷调查的方法。确定了各项指标的相对权重系数。给出了打分数据的处理方法。采用累积频率曲线分析的方法，选择安全性较好一组15％位累积频率对应的数值作为出口匝道...

Research on Safety Evaluation Method for Expressway Off-ramp

The safety evaluation method and process of expressway off-ramp were pointed out in this article at first, on the basis of plenty of observation, the evaluation index system was established from the aspects of geometric safety, installation safety and traffic management and control. Using the method of expert consult survey, the weight coefficient of each index was also giVen in this article, and the data obtained from the investigation could be disposed.In order to give the clear definition of different safety condition ,this article used cumulative percentage analysis method;the value corresponding 15% cumulative percentage of safety off-ramp was chosen as upper limit value of common safety, and the value corresponding 85% cumulative percentage of unsafely off-ramp was chosen as upper limit value of unsafely,and the safety level division standard could also be made. Finally,the safety evaluation method established in this article was verified on the basis of investigation of 8 off-ramps.