Too busy to drive? Let the car take the wheel. PopSci recently went for a ride in the Chevy Boss, winner of the 2007 Darpa Urban Challenge. With tricked-out GPS, sonar, laser guidance and a stack of computers, this 2007 Chevy Tahoe SUV can navigate an urban setting, weave around obstacles, and even negotiate intersections with other cars. GM expects the technology to be affordable, and less obtrusive, in about a decade.