What is the lollipop man in Formula 1?

The lollipop man is the one pit-crew who indicates to the driver:

1. Where his pit box is,

2. When to put his car in first gear, and

3. When to leave his pit box,

when the driver comes into the pits during the race.

He is named thus because the signboard he holds resembles a lollipop.

Some teams have begun replacing this crew with an electronic traffic-light system.