Which section is covered by the high-speed route?
Much of the way from Copenhagen to Ringsted now has an alternative high-speed line. From Ringsted, where there's a junction for the line south on the route towards the present ferry, and the line west via the other main island [ie besides the one where Copenhagen is] Fyn and on to Jutland [the mainland], I think it's still all existing lines (though perhaps they've been upgraded, in part, for higher speeds?). Of course the higher speed route south to the fixed link planned to replace the ferry might not use the Ringsted junction. but might run from the spur of the faster line from Copenhagen which goes off at Koge North towards Koge.