The detailed, cleaned up MATSim network files generated from OpenStreetMap in June 2014. Each area is made up of a coarse national network merged with the local dense network. Consider for example eThekwini in KwaZulu-Natal on the East coast of South Africa.
On the left you can see the coarse network, and on the right the same network zoomed in to eThekwini. The networks have been cleaned up. The projected coordinate reference system is South African Albers Equal Area. In MATSim, it is referred to as "WGS84_SA_Albers".