Complex sentence: In the interwar period, the extension of the Røa Line to Øverland was considered; the line would be constructed via Østerås to Øverland, continuing from there to Lommedalen in northwestern Bærum.
Split into simpler sentences: In the interwar period, Øverland was considered as an extension point of the Røa Line. The line would be constructed via Østerås and Øverland to Lommedalen in northwestern Bærum.