Tags: Railway Tunnel.
New Guanjiao Tunnel (Chinese: 新关角隧道; pinyin: Xīn Guānjĭao Suìdào) is located on the 2nd line of Xining – Golmud Railway in Guanjiao Mountain Qinghai province. It is dual bores double track rail tunnel. The total length of the tunnel is 32.645 km which makes it the longest railway tunnel in China. China Railway First Survey and Design Institute is responsible for the design. The New Guanjiao Tunnel was designed for two parallel single-track tunnel with speed of up to 160 kilometers per hour.