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What are the marshal roles?

Marshal roles are limited to Flagging with IndyCar. Seldom do safety marshals respond on a track as IndyCar / Holmatro paid crews deal with all the incidents using safety trucks including restarting stalled vehicles and lifting cars out of kitty litter with a Wrecker. However, it is possible to do a debris run with Race Control permission in certain circumstances.

What are the IndyCar flag rules?

yellow - waving - singleWaving Yellow flag is required when a vehicle is crashed or stopped on track, on the racing line. Vigorous waving is required when the disabled vehicle is in a dangerous position, attempting to re-enter the race while facing counter race traffic, or there are marshals present on course responding to an incident. Watch for and report passing under waved Yellow flag.

yellow - stationary - doubleDouble Yellow flags are displayed stationary in a side by side manner when Race Control calls for full course caution or safety car period. Race control must give the command for double stationary Yellow flags to be displayed. IMSA does not use an SC board. Passing may happen under full course caution when Race Control calls for passaround’s or waveby’s. Remember to wave your incident as per normal during a full course Yellow to warn drivers of danger, you will remain waving a Yellow flag because likely marshals will be present on track performing the recovery. Once the recovery finishes and your part of the track is clear, you may downgrade to Double Yellow flags in a stationary position.

yellow - waved - doubleDouble Waved Yellow flags are displayed in an extremely dangerous situation warranting urgent and extreme caution to be displayed. In race conditions double waved yellow flags would tell the drivers that there is a major incident and immediate braking is required especially if marshals are exposed on the track. Double waved Yellow is an “Alert” type scenario in a major emergency. On a street course, Double Waved Yellow signify full track blockage.

green - wavingGreen flag is displayed at the start of practice sessions. Green flag is not displayed after a Yellow flag on previous station. Vehicles can overtake as soon as they drive past the incident.


blue - wavingWaved Blue flag is displayed when a slower vehicle is being overtaken by a faster vehicle during practice, or a back market being lapped during the race.


white - stationaryStationary White flag is displayed for a slow moving vehicle that is significantly off pace. If the vehicle is so slow that it looks stationary to fast approaching traffic, a waved Yellow should be used. White flag is also displayed for emergency vehicles moving on track. When the emergency vehicle stops or when it stops and marshals enter onto the track surface then a Waved Yellow is displayed taking precedence over the White flag.

surface - flag - debrisSurface or Lack of Adhesion, also sometimes referred to as Debris flag is used when oil or small debris is present. Surface flag is always displayed stationary and never waved. If the debris is too large and cannot be driven over then a Waved Yellow flag is used suggesting imminent danger. White and Surface flags may be displayed simultaneously to warn of service vehicles on track and slick or oily condition. Yellow and Surface flags may be displayed simultaneously when marshals are working on the slick or oily track and are not yet finished laying down kitty litter.

red - wavingWaved Red flag is displayed to stop or end a session. The command to wave the Red flag must come from Race Control it is not a discretionary flag. All cars should proceed to the Pit Lane as the result. Passing under Red flag is of no major concern. Report any passing that isn’t safe in nature but keep in mind that tying up the network with a minor call interferes with a far more important call that actually caused the Red flag.

What are the Full Course Yellow & Restart procedures?

Race Control instructs all stations to hold Double Yellow flags steady.  For restarts, all stations display no flag. Green flag is only shown at Start.

What are the response procedures?

IndyCar relies on a traveling safety team using safety trucks that are strategically stationed around the track. For any response they get activated and Flag marshals must wave flags to cover them.

Race Control may permit a Flag marshal to perform a debris run. Take the quickest way out to retrieve the debris and clear the track as fast as possible keeping in mind it might be easier to kick off the debris than trying to pick it up.

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