 The link is planned to cross the Elbe between Glückstadt in Schleswig-Holstein and Drochtersen in Lower Saxony, to form part of the North West Bypass of Hamburg and improve the road connections along the Amsterdam–Copenhagen transport corridor.This is a joint project of the states of Lower Saxony and Schleswig-Holstein.The crossing is proposed to be a tunnel under the Elbe, and is expected to cost about 1.3 billion euros.