Wind-tunnel tests are used to find ways to help the cars slice more quickly through the air. The area on oval tracks on the inside of the racing surface closest to the infield. Also where drivers exit pit lane. Can be affected by humidity and temperature of the track. 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.