Kerb

A kerb (also spelled "curb") is a raised edge or barrier that runs along the inside and outside edges of turns on a racetrack, designed to mark track boundaries and influence how drivers navigate corners.

Think of kerbs like the curbs you see on regular streets, but specifically designed for racing. They're typically painted in bright, contrasting colors like red and white stripes to make them highly visible to drivers traveling at high speeds. These colorful strips help drivers clearly see where the track ends and where they shouldn't go.

Kerbs serve multiple purposes on a racetrack. First, they act as a clear boundary marker, showing drivers exactly where the racing surface ends. Second, they discourage drivers from cutting corners too aggressively or running too wide, since driving over them can upset the car's balance and slow it down.

However, skilled drivers sometimes use kerbs strategically. They might lightly touch the inside kerb at the apex of a corner to help rotate their car and maintain the optimal racing line. This technique, called "kerb riding," allows drivers to take a slightly tighter path through the turn while maintaining speed.

Different types of kerbs exist depending on their purpose. Some are relatively flat and smooth, while others are more aggressive with stepped surfaces that create a rumbling effect when driven over. The height and profile of kerbs vary significantly - some sit nearly flush with the track surface, while others rise several inches high.

The material and construction of kerbs also varies. Most are made from concrete or metal and covered with non-slip paint for extra grip. On temporary street circuits, organizers might use rubber kerbs that can be easily installed and removed.

Understanding kerbs is essential for anyone learning about motorsport, as they play a crucial role in how drivers approach corners and maintain their racing line throughout a lap.