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
Channel Tunnel favoured a drive-through tunnel, but ventilation issues, concerns about accident management, and fear of driver mesmerisation led to the only shortlisted rail submission, CTG/F-M, being awarded the project in January 1986. Among reasons given for the selection was that it caused least disruption to shipping in the Channel, least environmental disruption, was the best protected against terrorism, and was the most likely to attract sufficient private finance. The British "Channel Tunnel Group" consisted of two banks and five construction companies, while their French counterparts, "France–Manche", consisted of three banks and five construction companies. The role of the banks was to