When are drivers required to have their rain lights on?

Drivers are required to have their rain lights on when the Clerk of the Course announces wet conditions. This rule is established to enhance safety on the track when visibility may be reduced due to rain. The Clerk of the Course has the authority and responsibility to assess the weather conditions and determine whether it is necessary for drivers to activate their rain lights, ensuring that all participants are consistently informed about hazardous conditions. This directive helps other drivers become aware of the presence of cars on track that may be more difficult to see in wet weather, thus preventing accidents.

While it may seem intuitive to activate rain lights at the onset of rain or during night races, the formal requirement is tied to the Clerk of the Course's official communication. Qualifying sessions can have unique rules, but the key factor is the official determination of track conditions. By adhering to this protocol, drivers contribute to a safer racing environment.