BillD in the UK we do drive on the right side of the road. It just so happens that the 'right' side of the road is the left hand side of the road! IIRC it was Napoleon who changed a lot of countries over in both measurements, and which side of the road traffic should pass, just to annoy the English! Anyway, you could always take the option preferred on the Greek islands, and drive down the middle!
Any suggestion that American cars passing left side to left side exacerbates the coriolis effect and leads to the formation of 'Twisters' is an urban myth (maybe).