Beside the efficiency requirements of the infrastructure developments the financing of the projects is always a crucial issue. It becomes very important also in the accession countries, which expect funding from the EU. Therefore it seems also important to show to which extent the best of the alternative contributes to the cohesion and values on European level, which can be showed - as a proxy - by the participation of the international traffic from the benefits of the total traffic. In connection to the CBA and MCA evaluations, calculations have been made about the benefits gained and the burdens caused by the foreign traffic, which can be an argument for EU-funding also as a compensation for 'supra-national inequalities'. The higher the international participation from the benefits (and from the burdens) is, the higher the proportion of EU-funding should be as a contribution to the national efforts.