Driving on the right side may be left

Why Some Countries Drive on the Right; others Left

Among  the many possibilities given at What I Learned Today, I'm going with the driving on the left as being the the most practical.  The across the chest move is so awkward, not to mention dangerous. “ ... if you were right handed and you met some unsavory company on the road, you could draw your weapon, typically attached to your left side, with your right hand and bring it to bear quickly against the person who is going the opposite way of you on your right; all the while, controlling the reigns with your left hand. ”