Throughout the world, countries observe either left-hand traffic (LHT) or right-hand traffic (RHT.) This designates what side of the road a driver will stay on. In LHT areas, drivers will stay on the left side of the road, while RHT areas require drivers to stay on the right side of the road.
There are 163 countries that drive on the right-hand side of the road. A total of 78 countries and territories drive on the left. About one-quarter of all of the world's roads and about 35% of the world's population drive on the road's left side.
In the early 20th century, over 100 cities drove on the left side of the road. However, 34 transitioned to RHT laws by 1986. Below are all countries that drive on the left side of the road, many of which are British Commonwealth countries.