When we drive vehicle on expressway in the mountainous areas, there are many factors affecting driving safety. Especially when we drive at a high speed, pneumatic lateral force under the effect of horizontal wind will cause wheels cornering and unsteady steering, which affects the safety of driving. Based on the driving characteristics on the section of expressway with crosswind in mountainous areas, and three security issues that are vehicle roll, cornering and sideslip under the action of crosswind, this paper gives the various speed limit and proposes effective measures to ensure traffic safety, all of which can offer decision-making basis for traffic safety administration of the mountain expressway.
In view of the phenomenon of scene jumps, slow model refresh speed and fixed visual direction during virtual roaming, in the virtual drilling equipment teaching platform developed based on Unity 3D, the Cardinal spline curve interpolation algorithm is used to optimize the roaming path and improve the smoothness of the roaming. It uses rendering optimization algorithm to improve the fluency of the scene and adjusts the visual angle of observation through orientation change technology algorithm for design and optimization. The results show that the optimized drilling equipment teaching platform improves the comfort of roaming learning, the scene loading speed is increased by 28.73%, and the visual orientation is more convenient to observe the experimental objects. On the whole, it provides students with a comfortable and realistic teaching environment.
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