Relaying information to the drivers on track is an important part of any session in Formula 1, and while driving at high speeds, the visual aid of a flag can be vitally important in quickly warning a driver to any issues or updates to the track conditions.
Marshal posts are dotted around the circuits in various locations where flags cans be used to give a driver an order or warning of a potential hazard or issue up ahead. Although flags are still common, coloured light panels are being used more and more.
