> There is a little more on this subject at:
> http://www.travel-library.com/general/driving/drive_which_side.html
 
That "Keep Right" sign in Iceland reminds me of the problems I had 
driving there. On the hundreds of miles of dirt roads they don't so 
much drive on the right as pass on the right - you generally steam 
along the median until you sight something coming in the other 
direction, or approach a blind summit.
On some of the country roads, you don't meet oncoming traffic for 
minutes on end - long enough for me to forget where I was, so that at 
first sight of an oncoming, my Brit reflexes would kick in, and I'd 
haul over to the left, just as the other driver pulled right. Then 
I'd realise my mistake and pull right; just as he wondered what the 
hell I was doing and yanked to the left. And so on.
Grant