A system and method are provided for monitoring transportation system vehicle operator use of a mobile device. A directional antenna detects a signal produced by a mobile device within a vehicle operator area of a transit vehicle. The signal is transmitted from the directional antenna to an antenna controller. An event signal corresponding to the signal is generated at the antenna controller and the event signal is transmitted from the antenna controller to a logic unit. The logic unit determines a current status of the vehicle. The logic unit stores mobile device use event data in a memory based on the event signal and the current status of the vehicle.