FIA confirms Canada practice trial for new rear light system after driver feedback

The FIA will trial a new color-coded rear light system for power unit derating during practice at the Canadian Grand Prix, responding directly to driver feedback. The test takes place in the sole free practice session of the sprint weekend, after which the standard system will be restored for the remainder of the event.

Why it matters:

Current rear lights use a flashing red pattern to indicate when a car is no longer at full power, but drivers struggle to distinguish between different levels of energy recovery or loss. The new system aims to provide clearer, real-time information about a car's MGU-K state, which is critical for safety and strategic decisions on track.

The details:

• The trial includes three distinct colors: blue for a partial power reduction (MGU-K no longer at full power), purple for a full cut (energy recovery fully engaged), and yellow for a 'super clip' condition (extreme derating).
• Currently, all three states are indicated by the same flashing red light pattern, forcing drivers to rely on less precise cues from telemetry or spotter communication.
• The Canadian Grand Prix is a sprint weekend with only one 60-minute practice session, limiting the window for the test. If successful, the FIA may expand the system to other sessions or events.

What's next:

• After the practice session, the FIA will collect feedback from drivers and teams before deciding on permanent adoption or further adjustments. The system will revert to the standard flashing red lights for qualifying and the race in Montreal.
• A positive outcome could lead to a formal rule change, better equipping drivers to react to sudden changes in car performance and improving overall race safety.