List of long tunnels by type

Columns: Name | System | Stations | Length in km ( mi ) | Year Completed
Line 3 | Guangzhou Metro | Airport South - Panyu Square | 60.4 ( 37.5 ) ( longest branch ) | 2005-2010 | Line 10 | Beijing Subway | Xiju - Shoujingmao | 57.1 ( 35.5 ) | 2008-2012 | Seoul Subway Line 5 | Seoul Metropolitan Rapid Transit Corporation | Banghwa - Macheon | 47.6 ( 29.6 ) ( longest branch ) | 1995-1996 | Downtown Line | Mass Rapid Transit ( Singapore ) | Bukit Panjang to Expo | 44.2 ( 27.5 mi ) ( +2.2 km in 2024 ) | 2017 | Serpukhovsko-Timiryazevskaya Line | Moscow Metro | Altufyevo - Bulvar Dmitriya Donskogo | 41.5 ( 25.7 ) | 1983-2002 | Metro Madrid L-12 : ( Metro Sur ) | Madrid Metro , Spain | circle route | 40.96 ( 25.5 ) | 2003 | Toei Oedo Line | TMBT Subway , Japan | Hikarigaoka to Shiodome to Tocho-mae | 40.7 ( 25.3 ) | 1991-2000 | Kaluzhsko-Rizhskaya Line | Moscow Metro | Medvedkovo to Novoyasenevskaya | 37.8 ( 23.5 ) | 1958-1990 | Circle Line | Mass Rapid Transit ( Singapore ) | Dhoby Ghaut to HarbourFront | 35.7 ( 22.2 ) ( +4 km in 2024 ) | 2009-2011 | Busan Subway Line 2 | Busan Transportation Corporation | Jangsan - Dongwon | 35.5 km ( 22.1 mi ) | 1991-1999 | Seoul Subway Line 6 | Seoul Metropolitan Rapid Transit Corporation | Eungam Loop - Bonghwasan | 35.1 km ( 21.8 mi ) | 1995-2001

Example questions:
Which Moscow metro line has the longest tunnel length from those mentioned in the table ? | Which metro tunnel line in Singapore has fewer stations from those mentioned in the table ? | Which tunnel line from the Seoul Subway is approximately 57 minutes ? | Which metro line in Singapore is the longest tunnel from those mentioned in the table ? | Which of the tunnel lines is the world 's longest subway loop line ?

Answers:
Serpukhovsko-Timiryazevskaya Line | Circle Line | Line 6 | Downtown Line | Line 10