Lowest visibility on the right side of a winged sprint car.
I sat in a friend's sprint car on the track once and there is a big blind spot in the front right. The vertical win on that side comes down almost to the deck. Unless I turned my head almost 45 degrees to the right, I couldn't see nuthin but the track with the car pointed straight down the track. A driver with all the safety equipment would have even less mobility and visibility.