What happens if a race is red flagged before 75% of the scheduled laps or time has been completed and at least one lap has been completed?

When a race is red flagged before 75% of the scheduled laps or time has been completed but after at least one lap has been completed, there are specific protocols that must be followed to ensure a fair and orderly restart. Under these circumstances, the vehicles will line up in single file based on the last completed lap. This is crucial because it establishes an order that reflects where each vehicle was at the time of the interruption.

This procedure helps maintain the integrity of the race and allows for a fair chance for all competitors to regain their position. It also aids in minimizing confusion and chaos that might occur if vehicles were to simply restart from their original grid positions or without proper organization. By lining up according to the last completed lap, it ensures that the race can resume in a manner that reflects the competitors' performance leading up to the red flag.

In contrast, other options do not align with established racing protocols. For instance, cancelling the race entirely would dismiss the efforts of participants who have already completed laps, while restarting from original grid positions would not accurately represent the current standings of the race. Restarting without any procedure would likely lead to disorder on the track and could compromise safety and competitive fairness. Thus, the correct procedure is to line up in single