These pictures from Kruger National Park illustrate how the animals have adapted the environmental impact of tourism.  These baboons are taking advantage of the roads to travel from one side of the park to another.

Baboons only travel on the ground when there are no predators around.  In the face of danger, they retreat to the safety of trees.  Older baboons climb to the highest limbs, leaving the smaller, younger ones to fend for themselves in the face of leopards.

(click to enlarge)