The German case study in particular reveals the challenges that lie in the co-ordination of
investment decisions between different tiers of political decision making and state institutions
plus private actors such as the rail network companies and private investors. Therefore, clear
rules are necessary in the selection of projects for investments and there is also a need for a
clear division of responsibilities. Co-ordination between different organisations is essential.
Following the subsidiarity principle, as many decisions as possible should be taken at the
regional level, with the federal level restricting itself to the more strategic goals. In particular
in the road sector, this principle has to be re-established, including a revised division of