Submitted by corvusboreus, who says:

Replaying Deus Ex: Human Revolution and saw this map of the 2027 Detroit rail system. How much of a resemblance it has to the real rail system, I couldn’t tell you.

Transit Maps says:

Well, the short answer is that it doesn’t resemble it all. 

The longer answer is that it doesn’t resemble it because Detroit doesn’t currently have any rail transit apart from its adorable people mover loop downtown. Work has just started on the M-1 Rail Line (also known as the Woodward Avenue streetcar), which is scheduled to open in 2016, but there’s a long way to go before Detroit has as comprehensive a system as glimpsed in the dystopian (but transit-friendly!) world of Deus Ex. Still, there’s twelve years to go yet!

The map itself is pretty bare bones and obviously not meant to stand up to any long-term scrutiny within the game. It appears to consist of a ghosted-back Google Maps background layer with some blue water scribbled on top and some randomly placed lines and stations that really don’t make a lot of sense operationally – what’s with the Red Line and that loop at the bottom of the map?