[youtube https://www.youtube.com/watch?v=OHcmTDMeSVY?hl=en&start=0&fs=1&rel=0&showinfo=0&ap=%2526fmt%3D18&w=600&h=481]

Dexter Industries, who build 3rd party sensors for Lego Mindstorms — including a GPS unit called the dGPS — built a NXT device that alerts a driver when he or she drives too fast. Download the NXT program file here. [via The NXTStep]