But it's expensive now buying a new cap each time the driver changes.

Several teams made driver changes for the first practice session.

The rule preventing a driver change before the race start was also under scrutiny.

The driver changes into a forward gear as the nose comes about.

Tagliani started from the 33rd position as a result of the driver change.

Current races are 2 hours 30 minutes with a required driver change.

As this was a road course race, the following driver changes were made:

This record stood until 2008, where there were no driver changes.

By 2003 the team was running full-time with several driver changes over the season.

Williams also announced a complete driver change for the 2010 season.