The former has been preferred by the Rail Administration, while the latter—which would cost NOK 1 billion more—has been preferred by the municipality. There are no intermediate commuter stations between Skøyen and Lysaker, so there is little regularity or speed potential to gain from the construction, since the Oslo Tunnel from Skøyen to Oslo Central Station will still remain a bottleneck with only two tracks. Advocates have claimed that there is no gain from building this section without building two additional tracks all the way to the central station.
The first option has been favored by the Rail Administration, whereas the second, which would cost an additional NOK 1 billion, is preferred by the municipality. There are no intermediate commuter stations between Skøyen and Lysaker, so there is minimal regularity or speed potential to be gained from construction, as the Oslo Tunnel from Skøyen to Oslo Central Station will remain a bottleneck with only two tracks. Advocates have claimed that there would be no benefit in building this section without adding two additional tracks all the way to the central station.