Research On Highway Bridge (Road) Tunnel Transition Section Reasonable Cross-section Convergence

Highway tunnel section is an accident-prone road sections, especially in the bridge (the road) transition section. Among all the reasons,the lateral offset of the vehicles is an important factor.This paper first anaylsis the reasons of the lateral offset, includes visual elements, speed changes, psychological factors, road surface material factors. Then the paper statistical analysis the traffic Accident of four highways in Shaanxi Province, and surveys the accident distribution of the representative sections.over the sidelines to find a reasonable width and velocity measurement section, drawn both from the tunnel portal and tunnel exit section of the transitional changes of convergence, thereby Safety and tolerance design point of view more reasonable recommendation Bridge (road) tunnel cross section of a reasonable transition section convergence approach.