Signal boxes from the imperial era, missing overhead lines, overloaded routes - in order to make Germany's rail network, which is ailing in many places, fit again, the federal government has announced investments of almost 40 billion so far for the coming years. A significant portion of these funds should come from the federal government's so-called Climate and Transformation Fund (KTF), a special fund that is economically separate from the core budget. But after a ruling by the Federal Constitutional Court this....