The most spectacular change in Sub-Saharan Africa over the last few decades has been the dramatic demographic shift from rural areas to cities. As a result, more than 50 percent of the city streets in the region have no names or addresses, and the problem is particularly acute in the poorest neighborhoods.

The most spectacular change in Sub-Saharan Africa over the last few decades has been the dramatic demographic shift from rural areas to cities. As a result, more than 50 percent of the city streets in the region have no names or addresses, and the problem is particularly acute in the poorest neighborhoods.