Historical Map: Chicago Central Area Transit Plan, 1974
A map from on what looks like a presentation board showing the mid-1970s version of the Chicago Central Area Transit Plan. Initially planned as a whole new system of subway lines to entirely replace the Loop in downtown Chicago in the late 1960s, rising costs caused the program to be split into parts: the “Core Plan” seen here, with the balance to be built later. As it happened, none of it was ever actually constructed. […]