B (S-train)

B is a service on the S-train network in Copenhagen. It runs between Farum and [Høje Taastrup station|Taastrup station|Høje Taastrup] and provides stopping services on the S-train system's Farum radia and Tåstrup radial.
B is one of the base services on the network, running every 20 minutes from about 5:00 to 1:00 every day, and every 10 minutes between about 6:00 to 19:00 on weekdays. On Friday and Saturday nights there is also a 30 minutes service throughout the night.

History

Since the first part of the Taastrup radial opened in 1953, letter B has been used for its principal service. Before that the characteristic of service B was that it was the stopping trains to Holte.

Name	Southern end	Years	Northern end
1b	terminated at København H	1936–1940	Nordbanen: all stops to Holte
1b	Frederikssundbanen: all stops to Valby	1940–1941	Nordbanen: all stops to Holte
1b	all stops to Vanløse	1941–1949	Nordbanen: all stops to Holte
1b	all stops to Ballerup	1949–1950	Nordbanen: all stops to Holte
BO	The route and stops were changed multiple times during its operation.	1969-1972	Nordbanen: all stops to Holte
	terminated at København H	1950–1953	Nordbanen: all stops to Holte
	Vestbanen: all stops to Glostrup	1953–1963	Nordbanen: all stops to Holte
	all stops to Taastrup	1963–1979	Nordbanen: all stops to Holte
	all stops to Taastrup	1979–1986	Hareskovbanen: all stops to Farum
	all stops to Høje Taastrup	1986–1989	Hareskovbanen: all stops to Farum
	all stops to Høje Taastrup	1989–2018	Nordbanen: all stops to Holte
	all stops to Høje Taastrup	2018–	Hareskovbanen: all stops to Farum

Bb, L, B+

From 1972 to 1979, the service on the Taastrup branch was supplemented on weekdays by service E. In 1979 a separate daytime reinforcement service Bb was created; it ran every 20 minutes with a 10-minute offset to service B such that the Tåstrup radial effectively had a 10-minute frequency. Under the timetable doctrine followed in those years, a service letter such as B could not be used for more than exactly 3 trains an hour, so a separate service designation was needed for these daytime supplements. They later changed their name to L and then to B+, and were finally folded into B with the 2007 timetable.

Bx

Rush-hour supplements for B ran from 1955: