What does a blue flag indicate during practice sessions?

The blue flag serves a specific and important purpose during practice sessions in motorsport. It is used to signal to a driver that they are about to be lapped by a faster car approaching from behind. This is a critical communication tool on the track, as it alerts the driver to be aware of the following vehicle and to take appropriate action, such as allowing the faster car to pass safely. Understanding this flag helps maintain safety and efficiency during practice sessions, ensuring that all drivers can perform optimally while minimizing the risk of collisions.

In contrast, other flags such as yellow flags indicate a hazard on the circuit ahead, while red flags signal a major incident requiring all cars to stop. The blue flag, specifically related to faster cars approaching, plays a crucial role in maintaining proper racing etiquette and safety on the track.