The 1986 proposal by NSB considered the use of more modern rolling stock than the Class 69 trains being used. In addition to a branch proposal, it called for a loops from the Drammen Line between the stations of Stabekk and Høvik which would run down to Fornebu and stop at a station before continuing onwards to Lysaker. By then it was determined that keeping Oslo Airport, Fornebu would involve building a new, domestic terminal, situated at Oksenøen, from the old terminal. The train station would be situated between these and a moving walkway built between the terminals and to the train station. NSB preferred the loop, as it allowed trains running along the Drammen Line to deviate via Fornebu and serve the airport. The branch line would require all traffic from the west to transfer at Lysaker. Costs were estimated at 160 million kroner, including a third track from Bestun Station to Stabekk. NSB presumed that a similar operating procedure be carried out for a branch service. However, it proposed a different route which branched off west of Lysaker Station. By linking these with various lines to the east, this would allow direct services to the airport from the Østfold Line, the Gjøvik Line and the Trunk Line. For a loop service, NSB proposed that the airport be served with existing commuter trains running on the Drammen Line between Asker Station and Lillestrøm Station (today's line L1). The main advantage was that it would allow all regional and express trains, including those serving to the Bergen Line, the Sørlandet Line and the Vestfold Line, to call at the airport. Travel times were estimated at 12 minutes to Oslo Central Station, 18 minutes to Asker, and 25 and 33 minutes, respectively by commuter and express train, to Drammen Station. NSB estimated a twenty-five percent market share, giving an estimated 3,500 to 8,000 daily passengers, depending on how much airline traffic was allocated to Fornebu. A major advantage was that it would largely come as an additional product for existing services and would thus be economically favorable for NSB. The final railway proposal was placed in a 2001 report. It looked at the possibility that the Asker Line would have been placed in a different route between Sandvika and Skøyen through Fornebu. Various routes were considered, some of which would stop and other which would not at Lysaker.