It is part of the E6 route linking Norway with south-west Sweden.

[1] Construction started on 17 January 1961, and the tunnel was inaugurated at 11:30 am on 29 March 1968.

[1] The tunnel has the lowest motorway elevation in Sweden, at 15 m (49 ft) below sea level (nearby Götatunneln is lower and designed like a motorway but not signposted as one).

The tunnel has severe traffic congestion problems since several years, so therefore a new tunnel is built a little farther north, Marieholmstunneln, to be opened in 2020.

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