Interreg, or officially, "European territorial cooperation", is part of the structural and investment policy of the European Union. For more than 20 years, it has been supporting transnational cooperation between regions, towns and cities influencing everyday life for example in the fields of transport, employment and environmental protection. Interreg is realised within three key areas (so-called strands).

Interreg and its three strands:

• Cross-border cooperation (Strand A): advancing economic and social cooperation in adjacent border regions
• Transnational cooperation (Strand B): promoting cooperation between national, regional and local partners in transnational programme areas in order to increase the territorial integration of these areas
• Interregional cooperation (Strand C): promoting cooperation networks and exchange of experiences in order to improve the efficiency of existing regional development and cohesion instruments.

Sources and further information:

(German) Interreg website in English
Website of the European Commison