Is the Windshield a Speed-Reducing Glass?

[Reyn]

Automobile front windshields are not speed-reducing glass, as the so-called "speed-reducing glass" does not exist at all. Characteristics of automobile windshields: Car windshields are generally made into a large curved single-piece type with certain curvatures on all sides. This curved glass is a product with very high technical requirements, whether from the processing process or the fitting perspective, as it involves issues such as vehicle model, strength, heat insulation, and assembly. The reason for the speed-reducing effect when looking out through the car glass: Visual illusion. The variable people use to judge motion perception is not linear speed but angular speed (angle of view per second). Therefore, the more high-end the car, the longer the front part of the car, the greater the inclination of the front windshield, and the farther the driver is from the front of the car, the more obvious this "speed-reducing" effect becomes.