Most instances of safety car deployment in a single race
The most times a safety car was deployed in a single race was at the Canadian Grand Prix in the year 2011. It was the 48th overall Canadian Grand Prix. The race was marred by torrential downpour and the race started behind the safety car with the drivers struggling for grip in the wet conditions.
The safety car was called back after 5 laps and drivers were allowed to overtake. Lewis Hamilton's retirement necessitated by a collision saw the safety car being re-deployed in lap 8. After being withdrawn to the pits, lap 20 saw the third instance where the safety car was deployed owing to increased rain intensity.
Six laps later the race was suspended due to heavy rain and two hours later the race was resumed. The race was re-started behind the safety car and for the 5th time, they were again deployed owing to a collision between Alonso's car and Button's car. The 6th and final safety car deployment was necessitated due to track debris resulting from a collision between Heidfeld and Kobayashi's cars. There were a total of 6 deployments of safety cars.