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Top 20 Cities with Longest Metro Rail Tunnels

Which twenty cities have the longest metro (subway, underground) rail tunnels? We are looking for the longest single tunnel in each city's metro network.
Also try the (non-metro) Longest Rail Tunnels
Quiz by Jerry928
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Last updated: November 20, 2017
First submittedDecember 19, 2014
Times taken239
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km
City
miles
60.4
Guangzhou
37.5
57.1
Beijing
35.5
47.6
Seoul
29.6
41.5
Moscow
25.7
41.0
Madrid
25.5
40.7
Tokyo
25.3
35.7
Singapore
22.2
34.4
Shanghai
21.4
31.8
Berlin
19.7
30.8
New York
19.1
km
City
miles
30.8
Montréal
19.1
29.7
St Petersburg
18.5
28.0
Wuhan
17.5
27.8
London
17.2
27.1
Osaka
16.7
26.4
Nagoya
16.4
25.7
Suzhou
16.0
24.4
Munich
15.2
24.0
Delhi
14.9
23.1
Warsaw
14.4
+1
Level 52
Oct 3, 2017
Should accept NYC for New york.
+1
Level 41
Nov 20, 2017
you sure Shuzhou is correct?
+1
Level 73
Nov 20, 2017
Sorry, that should have read Suzhou. Fixed.
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