Linear Two-lane Highway Safety Evaluation Research And Application

According to the traffic safety status of the two-lane highways in China, this thesis firstly brings forward the alignment safety rating problem for two-lane highways. Secondly, the thesis analyses domestic and overseas development course of safety forecast technology and safety assessments technology, and discusses representative results in every phase. Thirdly, based on assaying and contrasting various data, this paper collects six alignment safety rating indexes, and erects corresponding alignment safety rating system. The rating indexes contain alignment index, speed index, economy index, driver workload, lateral friction and environment. The rating parameters contain equivalent speed for the first time, optimal turning angle and driver workload etc. This rating system strengthens the highway environment influence on driver workload, sight distance and vehicle safety, explains the inherent connection between alignment consistency and speed continuity, integrates a great deal of conclusions, and composes a detailed alignment safety rating system of two-lane highway. This paper consults domestic and overseas research conclusions, brings forward principle, frame, application flowing and rating standard of the rating system, according as systems engineering theory, adopts colligation fuzzy evaluation, applies safety rating conclusions to simulation safety rating, and gains detailed results.