think its summat to do with befor cars peolple on horse back with the joust %99 were right handed so we stopped on the right side to fight with our strong arm could be wrong but thats what my grandad told me
singapore.malaysia,india,thailand,australia,new zealand,and probably another 4 that iv'e forgot. european was because of napolean,and all countries he conquered,yanks took the same stance,( dirty English we will drive on the right that will show them,)
if I remember right about ireland trying out driving on the right hand side of the road
busses were still to drive on the left for the safety of the passengers