Why Verstappen's crash only prompted single yellows initially
Formula 1 race control's preference to avoid an unnecessary double waved yellow flag disrupting qualifying was key to George Russell's Austrian Grand Prix pole lap being preserved.
After a crash at Turn 9 for Max Verstappen in the closing stages of qualifying at the Red Bull Ring, F1's race control messaging system recorded a 22-second window between a single waved yellow flag and the double yellow flag in the relevant zone of the track.
A single waved yellow flag requires a driver to lift off and exercise caution, but a double waved yellow means a driver must slow significantly and be prepared to stop - and in F1 triggers an automatic deletion of the relevant laptime, to avoid any temptation to keep going at speed.
Two drivers were on push laps behind Verstappen in that phase of qualifying, and both Kimi Antonelli and George Russell were able to complete legal laps as they passed the crash site while it was still covered by single waved yellow.
Antonelli rolled out due to an erroneous belief he had seen double waved yellows at that moment, but Russell observed the single waved yellow to the letter of the law - in the eyes of the FIA stewards - and was able to complete a pole lap.
Both Antonelli and Verstappen, as well as many outside observers, queried in the aftermath the decision not to immediately introduce double waved yellows to the scene.
The Race understands this was a consequence of how race control viewed the incident and the part of the track it took place at.
The crash initially triggered an immediate local single yellow from the marshal at the post, alerting race control to the situation.
The automatic lap deletions mean significant competitive implications to double waved yellow flags, and there was a desire not to introduce them unnecessarily.
Based on the size of the run-off area, the lack of marshals attending to the car in that moment and the fact the car was not visibly damaged beyond restarting, race control elected to wait and see if Verstappen could get going again and return to the pits.
Only once it became clear that this would not happen, the status was upgraded to a double waved yellow flag.
