the first line in Sweden equipped with the signalling system ERTMS (Level 2) and has been tested at on the southern part of the Bothnia Line. Currently, Swedish signalling and its ATP safety system (ATC - Automatic Train Control) is only validated up to . Parts of the railway started to be used by freight trains on 16 October 2008, but with manual train protection control. No Alstom train was delivered for the traffic opening in August 2010, since the delivery time is at least two years. One train of the type Regina was rented from southern Sweden for the Umeå-Örnsköldsvik traffic, with a top speed of . Traffic to and from Sundsvall started autumn 2012. SJ ran the Stockholm-Narvik and Göteborg-Luleå night trains over Långsele-Mellansel-Örnsköldsvik-Umeå from August 2010, and from 2012 the shorter way Sundsvall-Kramfors-Umeå. Stations The trains stop at: On the Ådalen Line: Sundsvall Central Station 319.391 km Timrå 295.681 km Härnösand 248.051 km Kramfors 208.366 km Västeraspby (transfer, upon request, to the Höga Kusten Airport; about 2 km road distance) On the Bothnia Line: Örnsköldsvik Central Station 115.402 km Örnsköldsvik North 112.986 km Husum 90.313 km Nordmaling 58.109 km Hörnefors 34.856 km Umeå East Station 2.016 km Umeå Central Station 0 km Some trains stop at the larger stations only. The most used station is forecast to be Umeå East, since it is within walking distance of Umeå University and the University Hospital. Umeå Central Station was closed in 2010-2011 for rebuilding. Ådalen Line The Bothnia Line ends near the Höga Kusten Airport at the existing Ådalen Line, which runs Långsele–Kramfors–Härnösand–Sundsvall. The distance from the connection to Sundsvall is . This railway was built from 1890–1925, and is rather curvy and in poor condition. From 2003 to 2012, the Ådalen Line was improved along the existing route to allow higher speeds than before, with a maximum speed of . The improvements included new rails, new catenary, a new signalling system (ERTMS) and better and fewer road crossings. A few parts of it north of Härnösand (totalling ) were replaced with a new route, built to the same standard as the Bothnia Line, with a maximum speed of . The reason for keeping most of the existing route is that the advantage of building a new railway is smaller when there already is a railway, but the costs for a new railway would be the same as if