It may come as a surprise to riders on Metro's Orange Line in Arlington, Va., just outside Washington, D.C., but the area sets the bar for suburban transit.
That's because a risky, expensive decision by local planners in the 1960s as the Washington subway system was about to be built helped this once-sleepy community come alive. It led to an increase in residents and decrease in traffic. Instead of having a line bypass these nearby Virginia suburbs aboveground, next to a highway, planners decided to run it underground and redevelop the neighborhoods above.