The first security measure Joe passes on his way into work is actually several hundred yards from the office, at the gatehouse. Fixed cameras capture the make and license plate of each vehicle as well as the driver’s face. The guard inside the station can see if Joe is driving the car make and model listed in his employee record, and can check to make sure it’s the right license plate. This process can be set up to also match his face to the face in the employee directory.”]
Source: https://www.csoonline.com/article/2122888/gatehouse.html