On at least ten occasions since the end of the Second World War, nations have decided to change the side of the road on which they drive. In every case, the change was from left to right, beginning with South Korea in 1946, and concluding with Sierra Leone, Nigeria and Ghana in the early Seventies. But this time is different. The tiny island nation of Samoa has decided to change their traffic from the right side of the road (where about 70% of the world drives) to the left., effective on the 7th of September. Why? Patrick Barta explains the less-than-compelling logic.