It is the only base line in the network whose frequency is not doubled in the daytime; instead approximate 10-minute service on the outer part of the radial is provided by extending some trains on service C from Ballerup to Frederikssund.
This is the unique base line in the network that does not have its frequency doubled during daytime; rather, about a 10-minute service along the outer section of the radial is offered by extending certain trains from Ballerup to Frederikssund under service C.