A change to the left hand driving trend occurred in the late 1800s during the colonalization and pertition of Africa into the great Super Powers that mainly engaged in the colonization of Africa. In East Africa out of the five Nations 2 Only drive on the right hand And they Inlcude Rwanda, Burundi wellas Uganda, Kenya and Tanzania they drive on the left . They have the simple say Keep Left Hand . Be aware of the sign posts which will be showing LHD .
In spite of the shift to driving on the right, Britain stuck with the left hand driving rule and countries which were part of the British Empire were made to follow suit. This is why Uganda, Kenya and other former British colonies in African continue to drive on the left. One exception is Egypt, as that country was conquered by Napoleon before becoming a British dependency.Other colonies also adopted the driving style of their mother country.