8 Races and race cars that rev auto innovation

Races and the engineering behind the cars gunning for the checkered flag are powerhouses of automotive technological innovation. Click the "Next" arrow above to check out eight places where races and race cars are making a mark on the future of the industry, from proving the viability of alternative fuels to cars piloted by robots. Here, ethanol-fueled Indy cars make a lap at the Indianapolis 500.