The Hallandsås Tunnel (), also known as the Hallandsås Ridge Tunnel or Scanlink, is a railway tunnel in Sweden. It connects the northern and the southern sides of the Hallandsås geological formation (a horst). The length is ( in one bore, in the other). It's utilised by the West Coast Line, on the section between Ängelholm and Halmstad in southwestern Sweden. It has improved the connection between the cities of Gothenburg, Sweden, and Copenhagen, Denmark. In the longer term it will be a key component in the proposed Oslo to Hamburg high speed rail link via Gothenburg, Malmö and Copenhagen.