What is the pit stall sign called in auto racing?

Answer 1

I have never heard of what the sign is called, but here is something:

List of Formula One Pit Crew

• The "Lollipop Man" holds the team's pit sign, helping the driver identify his pit stall on a possibly crowded pit road. During the stop, he holds the sign in position to remind the driver to keep his brakes on while tyres are being changed, and then to remember to put the car in first gear once the jacks are lowered. He also gives the driver the sign to depart his pit stall by raising the sign from in front of the driver.