The Maastunnel is a tunnel, connecting the banks of the Nieuwe Maas. The underground part is 1070 metres long. The lowest point of the tunnel is approximately 20 meters below sealevel.Building commenced in 1937 and finished in 1942, making the maastunnel the first car tunnel in the Netherlands. About 75,000 motor vehicles and a large number cyclists and pedestrians use the tunnel daily, making the Maastunnel an important part of Rotterdam’s road network. Building commenced in 1937 and finished in 1942, making the Maastunnel the first car tunnel in the Netherlands.