Abstract: A detector assembly including a three-dimensional magnetic sensor adapted to detect presence of a vehicle, a transceiver operatively coupled to the magnetic sensor and adapted to send and receiver information, a microprocessor operatively coupled to the magnetic sensor and the transceiver. The detector assembly is part of a vehicle parking management system including a plurality of detector assemblies and a remote device operatively coupled to the plurality of sensor assemblies to exchange information with each of the plurality of sensor assemblies.