Why put the conditional if? Avoid conflict entirely by eliminating judgement calls. Like how close a car needs to be in front or behind you for you to react. It

Why put the conditional if? Avoid conflict entirely by eliminating judgement calls. Like how close a car needs to be in front or behind you for you to react. It just provides justification (in their mind) for a driver to stay left. Just pass and get over, regardless of if anyone is behind you. Driving rules should be as simple as possible. The fact that the lane isn't being used by anyone else isn't an excuse for you to use it as you see fit. Anymore than driving on the wrong side of a 2-lane road, just because there's no oncoming traffic.