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