Glass on the back of the vehicle are also known as the the rear windshield, and are installed to provide a clear view of what is behind the vehicle. This glass is made using the same material that is used in the front windshield, and can be smashed into a million pieces without having the pieces leave their place. As there is a special surrounding on the glass to help ensure that even during an accident the glass will not fall into a million pieces. However, every vehicle does not have this kind of glass, and smashes and breaks. The main purpose of this glass is to give the driver the ability to check on the oncoming traffic, and when reversing the vehicle. As the driver will be completely blind on who is coming from where without it the rear windshield. This windshield is not openable similarly as the front windshield is not.