When the Storting on 8 October 1992 chose Gardermoen as the location for the new main airport, it was also decided that trains should be the most important means of transport. A new high-speed train was supposed to be a competitive, future-oriented and environmentally friendly transport alternative.
On 24 November 1992, NSB Gardermobanen AS was founded and the company was responsible for building the new railway line. The company was commissioned to build a double-track high-speed railway - the first of its kind in Norway - between Oslo and the main airport and from there on to Eidsvoll. On 22 August, Romeriksporten was opened and the Flytoget came into full service.