When passing a stranger on the road, it would be safer to walk on the left, so ensuring that your weapon was between yourself and a possible opponent, because most people are right-handed.
1. In what countries the rule of the road is to drive on the right?
2. In what countries the rule of the road remains to drive on the left?
3. Where does the "to drive on the left" rule come from?
4. What historical event changed the practice?
5. Why did french armies have to march on the right?
