Switching sides

The Pacific island nation of Samoa has become the first country in decades to change driving sides. And it is likely the first time any country is switching from the right to the left - every other change has been the other way around. About 70 per cent of the world population drives on the right-hand side of the road - just like drivers in Pompeii and other ancient cities did. This is partly due to a larger cultural preference for right-handed activities.

But despite the enormous hurdles – physical, economic and political – that any move to change the driving side has to face, many countries have made the switch to match up with neighbours. Like Canada did in the 1920s and Sweden did as late as 1967. The current change in Samoa is ostensibly to help people get the benefit of cheap, used vehicles from richer neighbours Australia and New Zealand that drive on the left.