CNN reports on an intriguing new use of technology to fight speed traps, called Trapster. As the Trapster site explains:
When you see a trap, report it by pressing a button on your phone, or calling a toll free number. Other user's phones will alert them as they approach the trap. Trapster® learns the credibility of traps based on how many users agree. It also learns the credibility of each user, over time.
Trapster makes use of Wi-Fi technology to figure out where your phone is, and thus which alerts to send you.
Speed limits in the US are almost always set with a large slop factor. In a 55 MPH zone, most people drive at 65 and aren't ticketed -- but a cop with a quota, or one who doesn't like the looks of your car, can ticket you for going 56. In some areas, such as Boston's Big Dig, speed limits are said to be set low in order to create a revenue stream. You can keep up with traffic and risk a ticket, or drive at the speed limit and risk being hit by impatient drivers. This means that sane, careful drivers have to guard against speed traps. I don't know how well Trapster actually works, but I'm glad to see that people are thinking of ideas like these.