Swedish Railways had already stated their opposition some time ago...
https://tunnelcontact.com/discussion/view/29371/swedish-railways-pushes-for-a-tunnel-from-landskrona-to-copenhagen-instead-of-between-helsingborg-and-helsingor
...astlerock (Karnataka) and Vasco-da-Gama (Goa) to a double line, Indian railways will build a parallel line. O...l will be the parallel line.
https://goachronicle.com/south-western-railways-double-tracking-boosts-infras...
China's Giant tunnel boring machines are used to excavate the ground using a circular cross section that drills through a variety of ground soil or rocky earth to produce subway tubes, tunnels for railways and many more.
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