Oval tracks are slanted away from the outside retaining wall to help the cars stay on the racing surface. Banking typically is several degrees more in the corners than on the straightaways. The chassis of a typical Indy car is made of carbon fiber and aluminum. A penalty, usually assessed for speeding on pit road or for unsafe driving. If a penalty given, the car must be brought onto pit road and stopped for one full second in its pit stall.
Gas men are the only members on many teams wearing shielded helmets.
Cars line up behind a pace car and travel at a restricted speed until the green flag is waved to resume racing. Teams prefer to make their pit stops during a caution because there is less risk of losing positions. Using the atmosphere like an airplane, the car is pushed against the track to make it corner better. The rear spoiler on a stock car captures the air coming off the roof and helps hold the rear of the car on the track. The car in front opens a hole in the air and creates a vacuum behind it, pulling the second car along.