Tingstadstunneln is a motorway tunnel under the Göta Älv, connecting Hisingen with mainland Gothenburg. The tunnel was constructed with two parallel immersed tubes with three lanes of traffic in each tube. It is part of the E6 route linking Norway with south-west Sweden.
Construction started on January 17, 1961, and the tunnel was inaugurated at 11:30 am on March 29, 1968.
The tunnel has the lowest motorway elevation in Sweden, at 15 meters below sea level (nearby Götatunneln is lower and designed like a motorway but not signposted as one).