The better article on this would be "Why the Fehmarnbelt tunnel was not built". Because in Germany you cannot build big public projects in time and within budget. First you have politicians in the way, interfering in the project, with often absurd goals. But even worse, you have competing companies, which litigate contracts after the deadline, so you have to wait 10 years until the courts decided if the contract is valid or not. Costs are 10x higher then of course.

In Denmark this project would have been built in a year, in time and in budget. But unfortunately this involved Germany, so now they have another huge stinking overcost project. Denmark is angry