Study On The Safety Evaluation Of Interchange

Interchange as an important constituent of highway, have played the role of handling and controlling traffic. The security problems of interchange has become a increasingly prone to traffic accidents. And the safety study of the interchange is usually done by the traffic accident data chromatography. The safety evaluation of the design phase of is very lacking.According to the current domestic situation, this article discusses the significance of safety evaluation of the interchange. And to establish a safety evaluation process about the interchange. The safety evaluation research of the interchange was studied in the design phase of the project. Strive to minimize the traffic accident rate in the design stage.Firstly, this article make an safety investigation of the domestic-built interchange and summarize the impact of security factors of the interchange. Analyzed the shortcomings of reference standards or specification aspects and summed up a situation for the security evaluation criteria and methods of the Interchange of the current status in China. Secondly, interchange security should have the security type and the overpass spacing. In the condition of meeting the traffic flow, different types of the interchange has different Interchange security, this embodied in the linear ramp. Thirdly, safety evaluation of interchange analysis also included evaluation of the safety exit and entrance. Reasonable exit and entrance design can greatly reduced the traffic accidents. The safety evaluation of exit and entrance is mainly reflected in the distributed lane, auxiliary lane. Finally, speed change line is also the content needs to be evaluated. The lane shape, line, length of the speed change line, curvature radius of the diversion point and the parameters of the cyclotron line etc, must be evaluated from a safety point.