The systems described herein include one or more wireless vehicle detectors,
along with a distributed parking payment system such as parking meters or a paystation.
Information from the payment system and the vehicle detectors may be combined to
determine when a parking violation occurs, or is about to occur. This information
may then be transmitted through a communication system to a parking enforcement
officer, along with information about the geographic location of the violation.
The information may also, or instead be transmitted to a parking payer to notify
the payer of an impending infraction so that the payer may purchase additional
parking time before the violation.