Where should a guide person (Einweiser) position themselves when assisting a tractor with an excessive front overhang entering a blind junction?

1. Standing directly in front of the implement so that oncoming drivers see them first
2. Beside the tractor cab, where the driver can hear spoken instructions
3. In a safe place on the road or footway with a clear view of the approaching traffic, able to signal both to the tractor driver and to other road users
4. Inside the tractor cab, behind the driver's seat