Trapster® users share the location of police speed traps just by interacting with their mobile phones. The system uses the phone's GPS capabilities and wireless location, voice transcription, geocoding, reverse geocoding, and SMS, with a central database server. It communicates in real time, using the Internet to instantly alert other users as they approach the reported trap.
The Trapster® software and service is totally free and you can signup on there website for a free account and download this great piece of software.
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