The upgrades included continuous welded rails, centralized traffic control, a new catenary system, new passing loops at Gullberna and Vissefjärda, upgrade of the passing loops at Spjutsbygd and Holmsjö, new platforms at Holmsjö Station, speeds up to 200 kmph , 40 level crossings removed, 8 new tunnels and bridges, new track layout and signaling system at Emmaboda, and a rebuilt Karlskrona Station.