In the era when there was no windshield, the first-generation drivers wore goggles similar to those worn by airplane pilots at the time in order to keep them from being stuck on their faces by insects, stones, leaves and the like, and some also used scarves to cover their faces. This is also the source of the actor and actress distribution when we watch European and American movies and play various games. And when the engine is more advanced, it can provide faster speed. The drivers’ goggles and scarves began to be unable to withstand the pain of muddling their faces, so car manufacturers finally realized that they needed a windshield. However, since the beginning was to use ordinary glass to do this, the glass could be broken when the back was clicked, until Henry Ford, the founder of Ford, was broken by the glass once, and the plastics industry at that time made a lot of progress. Ford sandwiched two pieces of glass, separated by a layer of PVC to make a sandwich glass. The plastic interlayer prevents the broken glass from falling on the person in the car like a shower, helping to protect the passengers in the event of an accident. And up to now, the windshield is still made according to this principle. Today’s car windshields are generally made of a large curved surface, with a certain arc up and down, left and right. The function is to block the wind and rain to block foreign objects, and the film can also filter light to improve the driver’s driving environment. But it definitely has nothing to do with speeding or not. If you drive with a naked face, you can try a motorcycle. When it reaches a speed of 70KM/h, you can’t open your eyes. However, on many road sections, the speed of cars at 70KM/h is not considered speeding at all, and even on the highway, it is a violation of traffic regulations that it cannot reach the minimum speed of some lanes.