A telemetry system coupled to a vehicle can communicate with a remote site using the overhead control channels of a wireless network, such as a cellular mobile radiotelephone network. The telemetry system can monitor or control aspects of the vehicle's operations based on remote user input. The telemetry system can monitor a driver's driving practices and report incidences that meet preset criteria, such as violating a speed limit for a selected amount of time or a crossing of a geographical boundary.