Why do people in NASCAR swerve before the race?

In addition to the two answers already given, in some cases, there is rubber on the track. It's bits and pieces that wear off the tires during a race. It can sometimes stick to the tires as cars run over it at slower speeds. If you then try to accelerate at the green flag, you can spin the tires and be passed. read more

F1 races in the rain, and their cars have open tops. read more

Best Answer: To build up heat in the tires. And when they are running out of gas during cautions they do to help the gas to get in the pick-up. read more

The current record for most cautions of any NASCAR Sprint Cup Series race was set at 22 cautions during the Coca-Cola 600 on Sunday, May 29, 2005. read more