A system, method, mobile communication device and one or more computer programs for an access control system for controlling access to a restricted area. In one form, the restricted area is a parking station. In one aspect, the system includes: a communication system; and a computer program executable by a mobile communication device configured to: receive one or more entry signals from the communication system when the entity approaches an entry point of a restricted area; transfer, to the communication system, an entry request; receive, from the communication system, authorisation data indicative of the entity being granted access to enter the restricted area by an access control system; receive one or more exit signals from the communication system when the entity approaches an exit point of the restricted area; and transfer, to the communication system, an exit request indicative of the authorisation data in order to exit the restricted area.