Applicability Research Of The Main Parameters Of Road Geometric Design

Over the past ten years,our country has achieved great development in road construction. But with the rapid development of economy and society, people don’t just stay on the the accessibility requirements of the road,but also have a higher demand of the ability of protection,service levels and landscape.However, operational status of the road safety is not optimistic and one of the reason is the unreasonable road alignment design.This paper provides some suggestions about the development and improvement of our standard system and design parameters by studying and learning foreign standards systerm and design standards from two angles of macroscopic system of guarantee and the parameters applicability.Current administrative system of China,the legal system and civil security problems which are often caused greater damage and adverse effects,such as the decision of the engineering design innovation is a certain risk.So the system protection has great significance to the flexiblity in design.This paper analyses foreign stndard from laws,administrative regulations and industry standard. It also study the difference between China and foreign countries in formulating, publishing,management,the force of law and engineering applications and provide suggestions of flexiblity and innovation in design.In the case of partial indicators of poor applicability of geometric design, this paper documents the many inquiries and expert research.For the flat, vertical, horizontal design specifications of the main indicators, this paper select standards from major developed countries in Asian and European and compared to Chinese standrad.Finally,this paper give suggestions and conclusions based on the actual sitiuation of China.By comparing and analyzing the design parameters, some of the conclusions are selected to build two experiment.And then build 3D models of roads with Dicad and UC-win/Road, and then use Forum8 driving simulator to simulate the experimental simulation program.And then compare the applicability of design index by the simulator volatility of output and speed lane track.through the simulator volatility of output and speed lane track.It can be part of the verification of the applicability of the conclusions and recommendations to some extent.