New Guanjiao Tunnel

New Guanjiao Tunnel (Chinese: 新关角隧道; pinyin: Xīn Guānjĭao Suìdào) is a tunnel on the 2nd line of Qinghai–Tibet Railway in , Qinghai province. It is dual-bores, double-track rail tunnel. The total length of the tunnel is 32.645 km (20.285 mi), which makes it the longest railway tunnel in China. The tunnel's northeastern portal (37°11′00″N 99°10′40″E / 37.1834°N 99.1778°E) is in Tianjun County, the southwestern portal (37°00′34″N 98°52′50″E / 37.0094°N 98.8805°E) is in Ulan County.

New Guanjiao Tunnel

New Guanjiao Tunnel (Chinese: 新关角隧道; pinyin: Xīn Guānjĭao Suìdào) is a tunnel on the 2nd line of Qinghai–Tibet Railway in , Qinghai province. It is dual-bores, double-track rail tunnel. The total length of the tunnel is 32.645 km (20.285 mi), which makes it the longest railway tunnel in China. The tunnel's northeastern portal (37°11′00″N 99°10′40″E / 37.1834°N 99.1778°E) is in Tianjun County, the southwestern portal (37°00′34″N 98°52′50″E / 37.0094°N 98.8805°E) is in Ulan County.