He says the main challenge is the capacity of Line L2 between Ski and Stabekk, which is often full leading to long dwell times at the stations creating delays that propagate throughout the system.\r\nThere has also been an increasing demand to travel countercurrent, with more passengers heading south in the morning and north of the afternoon, especially to and from \u00c5s.\r\nThe additional services include:\r\n\r\ntwo departures each way on Line L22 Mysen - Sk\u00f8yen, to stop at Vevelstad during peak hours\r\ntwo departures each way on Line L22X Mysen - Oslo S during peak hours, which will stop at Kolbotn and Vevelstad\r\na new service on line L2 will be set introduced on the Kolbotn - Oslo S route during the morning rush\r\na new departure on line L21 Sk\u00f8yen - Moss in the afternoon rush\r\nthree new departures in the morning peak to Moss on line L21, and\r\nthree new departures in the afternoon rush to Oslo on line L21\r\n\r\nThe improvements will provide half-hourly frequencies during peak hours in both directions on line L21 to and from Moss, Vestby and \u00c5s. Kolbotn also gets more departures during peak hours, with the changes relieving pressure on trains between Ski and Stabekk. The Norwegian Rail Directorate is also looking at cost of introducing double-deck trains on the route, with the assessment due in autumn.\r\nMobile phone operators and Bane NOR have improved mobile network coverage along with line, including inside tunnels, but the body structures on some older trains used on the route have been found to be too dense to support a strong internal signal. Reception equipment such as repeaters are being installed on some trains to combat the problem, primarily on the slightly older Inter-City traffic trains runningon the Oslo - Halden route. Stadler Flirt trains operating on the \u00d8stfold line between Oslo and Mysen and Oslo and Moss already have this equipment installed.