In the United States, people drive on the right side of the road, while in Great Britain, people drive on the left. This is an example of a difference in what?

The reality is not exclusive to England: it is also driving on the left in 55 other countries and territories.

At the beginning of the 20th century, many of these former colonies, after becoming independent, preferred to start driving on the right, but in others, the tradition inherited from the colonists remained.