Anzob Tunnel Road. It is also a transit route between Dushanbe and Uzbekistan's capital Tashkent. Prior to construction of the tunnel, especially during winter, the threat of year-round avalanches led to periodic disruptions of commerce. The tunnel was officially opened in March 2006; it was built by the Iranian Sabir Co. Due to the significance of the tunnel, limited traffic flow was permitted via signing a waiver form noting potential hazards such as flooding and smog from construction equipment operating inside the tunnel prior to the final construction phase which may have included installation of ventilation and drainage infrastructure. As of May
Byfjord Tunnel at its lowest point. The tunnel held the distinction of being Europe's longest and the world's deepest tunnel upon its completion, it was surpassed by a deeper tunnel in 1994 and a longer tunnel in 1999. The tunnel had an average daily traffic of 9,675 vehicles in 2015. Byfjord Tunnel The Byfjord Tunnel () is a subsea road tunnel in Rogaland county, Norway. The long tunnel runs between Grødem on the mainland in Randaberg and the island of Sokn in Rennesøy municipality, running underneath the Byfjorden. The tunnel was built as part of the Rennesøy Fixed Link project which opened