Slovenia needs to define priority projects and find the most suitable financial mechanisms, she said.

"The most important thing is understanding what this package is meant for in the first place. It is only one of the tools with which the European Commission wants to kick start the economy and investments," Bulc commented in Brussels on the EUR 21bn in existing public funds that aim to encourage at least EUR 315bn in mostly private strategic investments.

An enormous amount of money is available but capital holders are very reserved, while Europe is hungry for investments, the commissioner added. She described the investment plan as a bridge for this gap, which is meant to provide security for investors.

"Slovenia first needs to set priorities, define which structural projects, which projects in science, education as well in the green economy it wishes to bring to life and then assess which financial mechanism is the most appropriate," Bulc said.

She did not wish to discuss in detail the chances of the upgrade of Slovenia's railway network, including with the construction of a second track to the Koper port, being made part of the investment plan.

Bulc said Slovenia is fully independent in its choice of projects, while she encourages, as transport commissioner, projects that are in line with the programme for the development of the Trans-European Transport Network (TEN-T).

Commenting on the call of European Commission President Jean-Claude Juncker to member states to also contribute independently to the fund for strategic investments, Bulc noted Europe needs a stronger investment boost than EUR 315bn, saying more than EUR 600bn would be necessary.