Förbifart Stockholm
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Förbifart Stockholm (Stockholm Bypass) is a series of underground motorway tunnels currently under construction between the Kungens Kurva interchange in the south of Stockholm and the Häggvik interchange north of Stockholm. Most of this bypass, more than 17 out of 21 kilometres, is being built underground. The Swedish government decided to permit the construction of the bypass on 3 September 2009, according to a proposal by the Swedish Road Administration.
The bypass will become the world's third longest road tunnel in the proximity of a city, after the Westconnex Tunnel in Sydney and the Yamate Tunnel in Tokyo. 140,000 vehicles per day are expected to use the bypass. The tunnel reaches at its deepest point 65 metres below sea level and the lake Mälaren. The projected cost for the project is estimated at 27.6 billion (short scale) SEK (2009 value, around 3.5 billion US dollars or 2.7 billion euros). Construction began in August 2014 but was stopped for political reasons soon after. It was restarted in early 2015 and was then expected to take ten years to complete.