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
Gotthard Road Tunnel north-south line in Switzerland. It was opened in 1882. In this category it is no longer the record-holder. The Seikan Tunnel in Japan and the Channel Tunnel between the United Kingdom and France are both in excess of . Under construction since 2002 and opened on 1 June 2016, the Gotthard Base Tunnel (a second rail tunnel, long), is the world's longest. It was built for the use of trains travelling from northern Switzerland to the Ticino area and beyond. The Gotthard Tunnel is the core and culminating point of the A2 motorway in Switzerland, running south from Basel through