In the climax scenes of Cars 3 , there is a wreck on the race car track. There's a dialogue between two cars.
Well, the green light is on and the pit road is open. Everybody is coming in.
At that point of time, many cars which are not the contestants of the piston cup also join the race.
Is this a failure of the security in the movie or people are allowed to join in real life races too? When there are cases of wreckage on the track, are new racers allowed to join the race in real life races like street racing, formula races? Are cars shown in the film equivalent to the crowd in real life? (Like some crowd may get there when there's an accident).