The Randstad is one of the most important economic regions in Europe. The region offers a high concentration of economic activity and houses over 8.2 million inhabitants. The Randstad hosts more than one hundred knowledge institutions, including seven universities. As gateway to Europe, the area is connected to three corridors of the Trans-European Transport Network (TEN-T): the Rhine-Alpine, the North Sea-Mediterranean and the North Sea-Baltic. As a result, there are direct connections to the major European metropolitan areas, via among others Amsterdam Airport Schiphol, the third-largest airport in Europe and the Port of Rotterdam, the largest port in Europe.