Wikipedia
Götalandsbanan (the Gothia line) is a planned high-speed railway planned to be built between Södertälje and Gothenburg in Sweden, past Linköping and Jönköping. The planned length is about 440 km. The speed is planned to be 320 km/h.
It will, if built, be used for passenger trains going between Gothenburg-Stockholm, Gothenburg-Borås, Malmö-Linköping-Stockholm, Linköping-Stockholm and more connections. The travel time Gothenburg-Stockholm is expected to be 2:00 to 2:15 compared to 2:45 to 3:00 today. The travel time (Malmö-)Linköping-Stockholm would be cut by 40 min, Jönköping-Borås by 40 min and Gothenburg-Borås by 20 min. A more dense schedule is possible also. It is also planned to have railway stations at the Gothenburg-Landvetter Airport and the Stockholm-Skavsta Airport. The disadvantage with the project is the big cost.