10. Boston
- length: 61 km
- country: United States
- year of discovery: 1901
- number of stations: 51
9. Montreal
- length: 71 km
- country: Canada
- year of discovery: 1966
- number of stations: 68
8. Toronto
- length: 76.5 km
- country: Canada
- year of discovery: 1954
- number of stations: 75
7. Atlanta
- length: 76.6 km
- country: United States
- year of discovery: 1979
- number of stations: 38
6. Vancouver
- length: 79.6 km
- country: Canada
- year of discovery: 1985
- number of stations: 53
5. Chicago
- length: 165.4 km
- country: United States
- year of discovery: 1892
- number of stations: 145
4. San Francisco
- length: 186.8 km
- country: United States
- year of discovery: 1972
- number of stations: 47
3. Washington
- length: 188 km
- country: United States
- year of discovery: 1976
- number of stations: 91
2. Mexico City
- length: 200.9 km
- country: Mexico
- year of discovery: 1969
- number of stations: 163
1. New York City
- length: 399 km
- country: United States
- year of discovery: 1904
- number of stations: 424
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