"plunked down $299 for a snap-on rearview mirror with a built-in navigation system that points out danger spots locally and across the country. He knows to drive at those spots with caution--to avoid possible wrecks and stay out of trouble with the law.

About 400 yards before his vehicle approaches an intersection monitored by a red-light enforcement camera, a prompt in the form of a female voice with a British accent issues the alert: "Red light camera ahead."

D.J. is using the Cheetah Advanced Technologies GPSMirror. It's high tech gear augmented by old school community participation. The GPS unit says where you are while your fellow would-be evaders tell you if you need worry about the long arm of the law.

Speed cameras and red-light cameras tend to be placed at dangerous intersections and accident blackspots. The GPSmirror comes preloaded with the locations of these enforcement cameras stored in its memory, and it warns you with a voice and visual reminder whenever you are approaching a camera. You can keep the mirror's memory up to date by downloading new camera locations from the Trinity database on speedcheetah.com. You can also mark other locations for your own personal reminders - GPSMirror website

I'm afraid this still isn't going to help with radar and laser guns (though the GPSmirror interfaces with many radar/laser detectors I'm not sure why you'd want to), but they're becoming a smaller piece of the traffic enforcement pie. And when cities like Chicago can gross $50 million per year from these automated cash machines, you know the installed numbers will only rise.