List of long tunnels by type

Columns: Name | Location | Length in km ( mi ) | Year Completed | Line
West Qinling Tunnel | China ( Gansu ) | 28.236 km ( 17.5 mi ) & 28.236 km ( 17.5 mi ) , 2 tubes | 2016 | Qinghai-Tibet Railway | Taihang Tunnel | China ( Shanxi ) | 27.848 km ( 17.304 mi ) & 27.839 km ( 17.298 mi ) , 2 tubes | 2007 | Shijiazhuang-Taiyuan High-Speed Railway | Hakkōda Tunnel | Japan ( Hakkōda Mountains ) | 26.5 km ( 16.5 mi ) | 2010 | Tōhoku Shinkansen | XRL | Hong Kong ( New Territories , New Kowloon and Kowloon ) | 26 km ( 16 mi ) | 2018 | Guangzhou-Shenzhen-Hong Kong Express Rail Link Hong Kong Section ( A further 4 km on the opposite side of the Hong Kong-China border . ) | Iwate-Ichinohe Tunnel | Japan ( Ōu Mountains ) | 25.8 ( 16.0 ) | 2002 | Tōhoku Shinkansen | Lainzer/Wienerwaldtunnel | Austria ( Vienna ) | 23.844 km ( 14.816 mi ) | 2012 | West railway | South Lüliangshan Tunnel [ zh ] | China ( Shanxi ) | 23.470 km ( 14.6 mi ) & 23.440 km ( 14.6 mi ) , 2 tubes | 2014 | Watang-Rizhao Railway

Example questions:
Under what strait is the rail tunnel that was finished at the earliest date ? | In what month did the most recently completed rail tunnel open for service ? | In what month did the longest rail tunnel open up ? | When did construction begin on the rail tunnel line that opened the most recently ?

Answers:
Tsugaru Strait | September | June | 2011