The Lilleaker Line runs 3.8 kilometres (2.4mi) from Skøyen to Jar. The line is a standard gauge, double track light rail line with 750volt overhead wire. At Skøyen it connects with the Skøyen Line of the Oslo Tramway and at Jar to the Kolsås Line of the Oslo Metro. Most of the route is dominated by housing. At Skøyen, there is a short walk to Skøyen Station on the mainline Drammen Line. It serves all west-bound trains of the Oslo Commuter Rail, some regional trains and the Airport Express Train. The station is also an important bus hub serving several routes.
The route continues via Hoff and Abbdediengen and Ullern. Previously a station was located at Bestum, but this was closed due to the vicinity to Ullern. The line then passes Furulund and Sollerud before reaching Lilleaker. The latter serves the northern parts of Lysaker as well as the shopping center CC Vest.