Here is a crazy idea, why did we stop building canals? Look at all those potential waterways (which might prove cheaper in the long run than roads). And don’t tell me its all about rapids and waterfalls, those can be overcome.
Also, notice how “landlockedness” is not just about national boundaries but about access to the sea and transport infrastructure.
kenopalo.com 
The U.S. did largely because of the growing efficiency of trains. Setting aside politics, could be that at least large portions of Africa aren’t very suitable for canals (plus water issues).
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Reblogged this on AFRIKASOURCES and commented:
Improving networks
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