Q-Free deployed a system which uses ultrasonic single-space sensors above every parking space in the facility. These sensors each have an external occupancy status light indicating whether parking spaces are available or occupied. The sensors communicate locally to a zone controller which then communicates on an encrypted wireless Mesh network back to a central server.
The server provides a user interface and allows viewing of real-time parking availability as well as parking statistics. Parking availability is displayed throughout the facility on electronic master signs, level signs and aisle signs.