He just runs right over old farm tractor

Farmer has the right to drive tractor on the road. That is a standard two lane road with a shoulder on both sides. The farmer only had a couple better options.

1: The farmer could have loaded his tractor on a truck and trailer, and hauled it.

2: The farmer could have been followed by a vehicle with flashers on.

3: The farmer could have had somebody else move the tractor for him.

Driving the tractor in the ditch for transportation purposes, is not a viable option.