Erlangshan Tunnel of Sichuang-Tibet Expressway


It is the longest tunnel which has been opened to traffic in China and provided with the highest altitude, one hole and two-way traffic. Besides, it is also a ultra-long and deeply-buried highway tunnel featuring largest stress, deepest burial and extremely complicated geological conditions. It has a total length of 4176m and maximum burial depth of 775m. It was commenced in May 1996 and completed in November 1998.