The next step for supercars

"More than two dozen next-generation automobiles have survived the first round of on-track testing for the $10 million Progressive Automotive X Prize.

Twenty-seven of the 36 vehicles that were invited to the "Shakedown" trials are still in the running after a series of evaluations at the Michigan International Speedway in Brooklyn, Mich. The evaluations included technical inspections as well as zero-to-60-mph acceleration runs, double-lane-change avoidance maneuvers and braking tests."