Etc...

Left? Right? It's all in a day's drive and the country you're in.

Among other distinctions, the world is divided between right-handed driving countries and left-driving countries. According to the website http://users.pandora.be/worldstandards, the right-driving countries outnumber the lefties 166 to 74 and have a large edge in percentage of population (66 to 34). Still, some people might ask: Why does the split exist at all? World Standards says traveling on the left side of the road was considered sensible in feudal times because most knights were right-handed and could mount their horses and draw their swords (which were worn on the left) unimpeded by an opponent to the right. The French Revolution is credited with giving a major boost to right-hand travel, and Americans have found it a way to distinguish themselves from their British brethren. The largest countries (by population) where driving on the left is required:

Indonesia
Pakistan
Japan
Bangladesh
Thailand
Britain
South Africa
Tanzania
Kenya
Nepal