AdamW said:Don't they drive left-handed on the continent because Napolean was left-handed? I seem to recall that he was the one who started all that nonsense!
There are all sorts pf aspects to the left/right argument:
http://users.pandora.be/worldstandards/driving on the left.htm
Some places swapped sides in the past, for example certain provinces of Canada changed from left to right during the 1920s to 1940s, and Sweden changed over in 1967.
Edit: The first link seems to be down at the moment. It's available on Google's cache here:
Which side of the road do they drive on?