This map from the early 1960s shows all the highways planned for construction by the end of the century. Some were actually built; others, like the second Beltway, weren't.
We all know about the Beltway: that six-laned leviathan that encircles our city. But what if there were a second Beltway: i.e. another concentric circle connecting Maryland and Virginia? It may sound far-fetched, but as transportation reporter David Schultz tells us, some transportation advocates say it's the only way to accommodate our region's growth.
[Music: "A to B" by The Futureheads from The Futureheads / "Walk Around in Circles" by Soul Coughing from Ruby Vroom]