"Two mobile applications, NMobile and Trapster, are giving drivers up-to-date maps of speed-enforcement zones with live police traps, speed cameras or red-light cameras. Each program pulls up a map pinpointing the locations of speed traps within driving distance. An audio alert will sound as vehicles approach an area tagged as harboring a speed trap. Both applications rely on the wisdom of the crowds for their data with users reporting camera-rigged stop lights and areas heavily populated with radar-toting police officers via the iPhone or their web-based application creating the ultimate speed trap repository available to you when you need it most — while you're driving. To thwart false alarms and eliminate inaccuracies, Trapster enlists its community of nearly 200,000 members to rank speed traps on their accuracy. NMobile founder Shannon Atkinson declined to provide detailed data, though... --..