What should an agricultural tractor driver do when leading a long line of backed-up cars on a two-lane rural road where overtaking is difficult?

1. Speed up to 100 km/h
2. When safe and where a wide shoulder or turnout exists, pull over safely to the right shoulder and stop or slow down to allow the backed-up vehicles to pass safely
3. Stop in the middle of the road and shout at drivers
4. Weave left and right to block cars from passing