No, there aren't. There is exactly one (1) city in sub-Saharan Africa with a modern urban rail system, and it's Addis Ababa, Ethiopia. In the rest of the continent's megacities (Nairobi, Lagos, etc) decent urban transit remains a dream. China has funded a bunch of long-distance rail, but that's primarily for trade (read: exporting raw materials).

But I still tip my pith helmet at you for crossing the DRC by Jeep!