Delta Works was completed by the Europoortkering which required the construction of the Maeslantkering in the Nieuwe Waterweg between Maassluis and Hoek van Holland and the Hartelkering in the Hartel Canal near Spijkenisse. The works were declared finished after almost forty years in 1997. In reality the works were finished on 24 August 2010 with the official opening of the last strengthened and raised retaining wall near the city of Harlingen, Netherlands. Due to climate change and relative sea-level rise, the dikes will eventually have to be made higher and wider. This is a long term uphill battle against the sea. The
Evolution of motorway construction in European Union member states Evolution of motorway construction in European Union member states The evolution of motorways construction in European Union member states by total number of kilometers existing in that year. This is a list of the total number of Motorways by country, member of the European Union. It includes motorways (controlled-access highways), classified as such by the Eurostat. * Note: The table above is missing the next European countries due to the lack of kilometers built in the 20th century; Latvia and Malta, . * Note: Due to the new European standards in 2011 some European countries had their total number of