Mobile app Trapster just rolled out its 4.0 release and added new features to help users log roadtrips, locate friends, better avoid tickets, and get around rockslides. Even the police are pitching in to aid (and slow) your commute.

Trapster started out as a simple way to track where police speed traps so that users could avoid getting ticketed. With the addition of a mobile app for the three most popular smartphones on the market — iPhone, Blackberry, and Android — as well as added text-messaging capability, it allowed people to use their phones as radar detectors, alerting you if you approach a reported speed trap and letting you report new ones.

The app has since blossomed into a customizable, data-rich resource. Most of this is because it's free and has a huge base of users...

 [ Source: jalopnik.com ]