It's called Track N Go. AD Biovin, a company that manufactures snowmobiles and related equipment, developed the system. It converts 4-wheeled drive vehicles, such as conventional trucks and SUVs, into tracked vehicles that go over and through snow as easily as snomobiles.
The company says that the installation takes only 15 minutes. Just drive into one set of tracks, then the other. Secure them to the truck with chains, attach the track tensioner to the wheels, and flip in the snow deflectors. The motion of the wheels drives the tracks.
-via Gizmodo