Part of a promotional brochure discovered by Reddit user Globalwrath while cleaning his grandmother’s estate, here’s a fascinating look at the early pre-construction history of Metrorail.

Much of the actual current system is represented fairly well as the “Authorized Basic System” (thin black lines) and “Adopted Regional System” (thick black lines) with at-grade sections represented by pink lines instead. Station names are obviously tentative (Pooks Hill? Weapons Plant?), but the alignments are very familiar.

Of perhaps more interest are the thick dashed lines that represent future extensions. Even in 1968, a connection out to Dulles Airport was envisaged… and is only now becoming a reality some 47 years later. Other extensions deep in to Maryland and Virginia (Germantown? Brandywine?) seem far less likely to ever eventuate.