Delta Works needed level of flood protection and the resulting costs are a recurring subject of debate, and involve a complicated decision-making process. In 1995 it was agreed in the Delta Plan Large Rivers and Room for the River projects that about 500 kilometres of insufficient dyke revetments were reinforced and replaced along the Oosterschelde and Westerschelde between 1995 and 2015. After 2015, under the High Water Protection Program, additional upgrades are made. In September 2008, the Delta Commission presided by politician Cees Veerman advised in a report that the Netherlands would need a massive new building program to strengthen the country's
Motorways of the Sea for funding the Motorways of the Sea, while Article 13 of the same Programme defines the characteristics of this part of the TEN-T network. Four Geographic areas have been designated by the EC (see map): Motorways of the Sea Motorways of the Sea are a concept in the transport policy of the European Union, stressing the importance of sea transport. The main aim of these Motorways of the Sea is to improve port communications with peripheral regions of the European continent and thus strengthen the networks between the EU candidate countries and those countries already part of the European Union.