ADAS stands for Advanced Driver Assistance System. It is a rapidly growing new technology that includes systems to help the driver in the driving process. When designed with a safe human-machine interface they should increase car safety & more generally, road safety.

Calibration is necessary after a new glass installation, particularly a windshield with a camera mounted to it, to ensure that the ADAS features continue to function properly despite having been moved during installation.

If the cameras/radars/lasers on the vehicle are off by even a few millimeters they may not give accurate readings and the system may not function properly, leaving the installer with potential liability

Depending on the type of calibration & the specific vehicle, calibration can take anywhere from 45 minutes to 2.5 hours.