Control vehicle access to the area and its re-exit is a specific case of access systems, which has its own requirements, rules and demands on technical resources. To check the legitimacy of the entrance must decide on the legitimacy of the entrance of the vehicle or the driver (the crew), or both. The system must ensure the safety of the vehicle at a mechanical barrier (gate, post, road block), problems are with lifts and trailers. Own choice of species and type of mechanical barriers subject to the security aspects of the application - here comes the link to security systems. Some entry systems - Parking - have a direct connection with POS systems. In all applications, it is important to identify both vehicles (optical pickup vehicle registration number) and drivers.