I wouldn't say railways are cheaper but they are definitely much more efficient and environment friendly. One of the big issues is it that is very hard to buil

I wouldn't say railways are cheaper but they are definitely much more efficient and environment friendly. One of the big issues is it that is very hard to build new railway tracks. The current German infrastructure is already near the limit and the time and cost till a project starts (a lot of issues with people living near it, costs, regulations) is very high. All in all I think it's a good idea to improve existing infrastructure but not sure if it will scale.