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