If you are driving a slow-moving vehicle in a no passing zone on a road with two lanes traveling in opposite directions, you should pull over to let others pass if:

1. One vehicle is behind you.
2. Two or more vehicles form a line behind you and it’s unsafe for them to pass.
3. Five or more vehicles form a line behind you and it’s unsafe for them to pass.
4. The road is posted with slow-moving vehicle signs.