The name of the game is speed – it is the Indianapolis Motor Speedway, after all – but race officials give drivers other commands, too. And they're often communicated by flags. Here's what each Indy ...
Quite simply, it's go time. More technically speaking, according to NASCA R, the green flag represents unique purposes when it waves: 1) the start of on-track activity for practice, qualifying or race ...
Marshals at F1 circuits around the world use coloured flags to relay messages to drivers, but some are used more than others ...