厄勒海峡(φresund)将瑞典和丹麦隔开。早在30年代中期,一个穿越海峡连通两国的计划已经提出,后因第二次世界大战而停搁。50年代又重新提出,以后几乎不断地进行准备工作。1992～1993年,对此作了综合性地质调查,在此基础上进行了设计。 The Øresund separates Sweden from Denmark. As early as the mid-1930s, a plan to connect the two countries across the Strait has been proposed and then stopped by World War II. In the 1950s, it was reintroduced and preparations were almost constantly carried out afterwards. From 1992 to 1993, a comprehensive geological investigation was made on the basis of which the design was carried out.