by regional trains. Elsewhere the tracks are in the open, occasionally above or below street level. The three northern radials are: Farumbanen (formerly Hareskovbanen) (the Farum line) to Farum. (B & Bx lines) Nordbanen (the north line) to Holte and Hillerød. (A & E lines) The Klampenborg line to Klampenborg. (C line) The three southern radials are: Køge Bay Line to Hundige, Solrød Strand and Køge. (A & E lines) Vestbanen (the west line) to Høje Taastrup. (B & Bx lines) Frederikssund line to Ballerup and Frederikssund (C & H lines) The six radials are additionally connected by Ringbanen (the Ring or F line) going between Hellerup in the north and Ny Ellebjerg in the south. The Ring line is connected to the Nordbanen (north line) and Klampenborg Line at Hellerup, but it is normally only used in connection with the Klampenborg line. The Ring line has an elevated section including Nørrebro Station, which offers a view of some of the most populous areas of the city, Nørrebro and Nordvest. The junctions of the Farumbane with the other lines at Ryparken and Svanemøllen include a short elevated section and a short northbound tunnel, respectively. The average distance between stations is 2.0 km, shorter in the city core and inner boroughs, longer at the end of lines that serve suburbs. Lines Since December, 2020, there are seven lines running across the network. A, B, C and F run all week, E and H Monday to Friday and Bx is a support line that operates only during the rush hour. All stations are served at least every 10 minutes until the evening. Train departures occur approximately every two minutes at the stations on the city core route as all lines but the F Ring Line use the same path. On most suburban lines, the trains depart every five minutes. On Sundays these time intervals are doubled. Originally, no letters or numbers were used for the individual lines, but the timetables from 14 May 1950 for the Klampenborg, Holte and Frederiksberg lines were designated as sections 1a, 1b and 1c. Those lines became A, B and F respectively while simultaneously a new line C was created. In 1963, a subordinate x (for extra) was introduced to rush hour lines with line Bx as the first. From 1979 to 1989, some lines which only ran during daytime on weekdays daytime, were characterized by doubling