North Central Service
The North Central Service (NCS) is a Metra commuter rail line running from Union Station in downtown Chicago through northwestern and far northern suburbs to Antioch, Illinois. In December 2022, the public timetable shows seven weekday departures from Chicago. This line does not run at all on weekends or holidays. While Metra does not explicitly refer to any of its eleven routes by colors, the NCS' timetable accents are lavender, a shade of purple. It is one of two Metra lines (the other being the Union Pacific West Line) that do not have a specific color for a fallen flag railroad that used to operate on the route. Between Union Station and , the North Central Service shares tracks with the Milwaukee District West Line, but does not stop at any of the intermediate stations used by the MD-W between and River Grove. About a mile west of River Grove, this route turns north at a junction known as tower B-12. The rest of the route operates on the Canadian National Railway's Waukesha Subdivision. Until 2020, a single daily inbound train, no. 120, made all stops along the North Central Service from to , then switched to the Milwaukee District