(1) I&#x27;m not sure self-driving machines will actually need that much more infrastructure. For one, driver training would be less necessary, and car utilization could go up.<p>(2) assuming they did require infrastructure, what does Africa&#x27;s future population has to do with it? Random person does not matter (taking &quot;random&quot; as &quot;uniform&quot;), random car buyer does -- either they have enough cars which would make the infrastructure worthwhile, or they don&#x27;t, in which case they can be safely ignored for all car-related purposes.<p>It could be that (i) things like bad roads make things difficult for self-driving cars, while (ii) labor is very cheap and everyone who can afford a car can afford a personal driver. It would still mean a fairly small ratio of cars per capita, but I don&#x27;t think anyone predicts that self-driving cars will ever completely replace human drivers :)