"Madison Avenue Line" . "Fifth and Madison Avenues Line" . . . . "M1, M2, and M3" . "Fifth and Madison Avenues Line" . "M4" . "today's M2 and M3" . . "M1" . "M1, M2, M3, and M4 buses" . "Fourth Avenue Line" . "M1, M2, M3 and M4" . . . . "M2" . "M3" .