Arlanda Line

The Arlanda Line (Swedish: Arlandabanan) is a 19-kilometre (12 mi) long railway line which allows trains on the East Coast Line to reach Stockholm Arlanda Airport in Sigtuna Municipality, Sweden. The Arlanda Line branches from the East Coast Line at Rosersberg and rejoins again at Myrbacken. It is built for speeds of 200 kilometres per hour (120 mph), is electrified at 15 kV  16.7 Hz AC and is double track. The 5-kilometre (3.1 mi) section under the airport runs in a tunnel, and has three stations: Arlanda South, Arlanda Central and Arlanda North.

The Arlanda Express operates four times per hour, increasing to six times per hour during rush hour, to and from Stockholm Central Station, the largest railway station in Sweden and in the Nordic region. Operated by A-Train, the service uses seven X3 trains and calls at the north and south stations. The line is also served by 70 other regional and intercity trains daily, operated by SJ, SJ Norrlandståg and (with very limited service) Upptåget, and since December 2012 also by Stockholm Commuter Rail. These all stop at Arlanda Central.

In 1994, A-Train was awarded the right to build the line in a public–private partnership, where A-Train financed about half the 6 billion Swedish krona (SEK) to build the line. The private consortium was granted a 40-year permit to operate the line in exchange for all direct traffic and the right to collect usage fees from other train companies. The line opened in 1999 and A-Train holds the sole right to operate to Stockholm, and collects a fee from other train operators using the line. The line itself is owned by Arlandabanan Infrastructure AB, which is owned by the Ministry of Enterprise, Energy and Communications.