Routes
A (Rockville Route) Metro Center - Shady Grove (red)
B (Glenmont Route) Metro Center - Glenmont (red)
C (Huntington Route) Metro Center - Huntington (blue/orange-blue-blue/yellow-yellow)
D (New Carrollton Route) Metro Center - New Carrollton (blue/orange-orange)
E (Branch Avenue Route) Gallery Place - Branch Avenue (green/yellow-green)
F (Greenbelt Route) Gallery Place - Greenbelt (green/yellow-green)
G (Addison Road Route) D junction - Largo Town Center (blue)
J (Franconia-Springfield Route) C junction - Franconia-Springfield (blue)
K (Vienna Route) C junction - Vienna (orange)
L (? Route) F junction - C junction (yellow)
Any idea what H and I were to be? Dulles and Columbia Pike branches?  (talk - )