this is a practice day but on friday what is going to make this race truly groundbreaking is that the teams are gonna be flying around the track, notjust to compete on seeing which car is the fastest, but also if they can pass each other at increasingly higher speeds. passing is incredibly important, because it showcases how autonomous vehicles can perceive one another, can determine when to pass, when to overtake, and we're going to need to do that in regular highway driving if people are in different autonomous vehicles, they're going to have to encounter one another at high speeds. and it's never been tested out, no—one�*s ever done high—speed passing of autonomous vehicles ever in the world, so this is going to be a real first. so, race day is here. the original multi—car head—to—head contest proved a little too ambitious in these covid times, so this is a knockout contest between two cars at a time, each taking it in turns to pass each other safely at high speed, until one car fails to overtake and gets eliminated. and all does not quite go according to plan.