Submitted by David Daglish, who says:

Rio De Janeiro’s metro system has only two lines, both cover the same stations through the business district to the tourist areas of the Zona Sul. The transit map also shows “metro bus” connections that don’t quite make geographic sense.

Transit Maps says:

A “straightened” linear version of the full Metro map (reviewed here, 2 stars), which enhances the legibility considerably. Strangely, this version also has information about weekend services that the full map completely lacks. However, the directional arrows between each and every station has to be one of the most ridiculously redundant pieces of design I’ve ever seen.