NASCAR introduced the choose rule a few years ago, which is their own take on the choose cone commonly used at short tracks around the country. It's a V-shaped painted box on the frontstretch and its purpose is simple: Drivers may choose which lane they wish to restart in for double-file restarts.
At tracks like Martinsville, the inside is obviously favored while the outside is clearly better at some other circuits. Drivers will even give up track position just to get in the preferred lane while some will gamble, snatching up free spots and taking the lane nobody else wants. However, there are some tracks where the choose doesn't really matter all that much either. It has also stopped the practice of drivers slamming on the brakes while exiting the pits in order to end up in the preferred lane for the upcoming restart.
