 Most north-bound trains originate at Oslo Central Station (Oslo S), but some rush-hour services start at Skøyen, and operate through the Oslo Tunnel to Oslo S, to serve large working districts of Oslo.Vy Gjøvikbanen has a train leave and depart Oslo S every 40 minutes; however, the trains have three different stopping patterns and termini, giving each of the three services a two-hour headway.Two services are commuter trains, and stop at all stations.