Drivers are promptly informed of a dangerous situation only and exclusively if it concerns them.

A message information on the status of all marshal posts is sent to all cars approximately every 0.4 seconds.
IMD calculates what to show at least 10 times per second using:
• real-time car position
• circuit map data
• track status received by Race Control

Operator can define the status of each individual active marshal post along the track through the race control software interface.
The warning message starts at the line on the racetrack perpendicular to the point of the first displayed flag.

✔ Self-generated "NEXT YELLOW" message: it informs the driver that he is approaching a yellow flag zone.
The green flag is displayed for 8 seconds at the following marshal post after the hazard site.

All cars are self-synchronised every second using time reference signals provided by GPS satellites.
Informing every driver at the same time avoids big speed differences between cars, reducing serious hazards.

With on-board countdown, all the cars go FCY and back to green at the same exact time (estimated max. error: less than 10 milliseconds)

✔ Any speeding during FCY period is automatically detected and notified to Race Control.