The Indy 500 is the centrepiece of the championship and a gargantuan sporting event in its own right. Taking place at the legendary 2½-mile Super Speedway oval track at Indianapolis, in economic terms it’s bigger than the Super Bowl, which is partly a result of the huge numbers that attend on the race day itself, and partly because it takes place over three weeks of practice, testing and qualifying before the race itself. ‘The Month of May’, they call it.