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
Summit Tunnel Gooch, assisted by Barnard Dickinson. Progress on the tunnel’s construction was slower than anticipated, largely because the excavation process was more difficult than anticipated. On 1 March 1841, Summit Tunnel was officially opened by Sir John Frederick Sigismund Smith; it had cost of £251,000 and 41 workers had lost their lives. On 20 December 1984, the Summit Tunnel fire occurred. No lives were lost and five months later, the tunnel reopened after limited repair work. The tunnel has remained in continuous use for passenger and freight services with little interruption since it opened. Summit Tunnel, between Littleborough and Todmorden is