virtual reality;  safety and security engineering;  Active safety controls;  Vehicle speed

Aiming at the difficulty of designing effective safety facilities before the road is completed, relying on the construction drawings and on-site investigation data of the northern foothills of the Qinling Mountains of the West Han Expressway under construction, the driver speed control mode simulation calculation system software is used to predict and study the running speed of the road section, and at the same time, the safety evaluation of the traffic engineering facilities, lighting and other systems of roads, tunnels and bridges is carried out on the basis of virtual simulation, so as to find the driving safety problems in the design process of the West Han Expressway. The Xihan Expressway active safety control system scheme including active speed control facilities and supporting signs was designed. Then, virtual reality technology is used to virtually model the highway safety engineering facilities, and applied to the virtual highway model, and the feasibility of the highway safety engineering scheme is evaluated through virtual experiments, and then the design scheme is applied to road construction to improve the operational safety of the road.