City Metro Networks – Major Cities

To qualify for inclusion here:

  • the city must be the equivalent of a Tier 1 city or have significant regional and international relevance
  • the city’s metro network must consist of no fewer than 5 lines over 120 km (75 miles)
  • the city metro system must have an established bilingual service and signage system

These systems (as shown below) currently qualify for inclusion, and are listed in order of importance and general usage.


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