The Milwaukee District West Line (MD-W) is a Metra commuter rail line in Chicago, Illinois, and its western suburbs. Metra does not refer to any of its lines by a particular color, but the timetable accents for the Milwaukee District West line are dark "Arrow Yellow," honoring the Milwaukee Road's Arrow passenger train. Trains are dispatched from Canadian Pacific's American headquarters in Minneapolis. On weekends, Metra operates 12 roundtrips on Saturdays and nine on Sundays and holidays, all running from Union Station to Elgin. There is no weekend or holiday service to Big Timber Road.