Under IMSA WeatherTech SportsCar Championship regulations, the pit lane speed limit is strictly enforced at 60 kilometres per hour (km/h) for all participating cars. Competitors caught exceeding this limit must serve a drive-through penalty down the pit lane. If a driver fails to comply or commits severe noncompliance, they risk being shown the black flag by race control.
Speed Limit Enforcement and Escalation
The 60 km/h restriction applies uniformly across all classes operating in the pit lane. The primary sanction for a pit lane speeding violation is a drive-through penalty, requiring the car to travel the full length of the pit lane under the speed limit without stopping for tyres, fuel, or mechanical work. Failure to heed race control instructions or repeated noncompliance risks escalation to a black flag, which directs the competitor to report immediately to the pits.
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Pit Lane Safety and Operational Context
The pit lane speed ceiling operates in conjunction with strict crew safety protocols. Personnel may not cross over the pit wall until a car has come to a complete stop, and routine servicing is restricted to four designated crew members. During endurance events where driver rotations occur, additional crew assistance is strictly governed under IMSA's driver change rules and pit protocols before the car departs the pit box and accelerates back to the 60 km/h pit exit threshold.