List of busiest subway lines in Italy

This list includes all the subway systems in Italy, classified by absolute annual ridership and annual ridership per kilometer. All the subway lines in Italy are referred as Metro (shorter form of Metropolitana, lit. subway in English), they are all considered as Mass rapid underground transit, whose trains are different from the ones from the National railway company Trenitalia, and whose network is not linked to the national railway network. Their characteristics are quite different from each other: some of them are more similar to suburban railways, with a lower frequency, while others are more similar to tram lines, still called Metro.

The International Association of Public Transport (L'Union Internationale des Transports Publics, or UITP) defines metro systems as urban passenger transport systems, "operated on their own right of way and segregated from general road and pedestrian traffic".

, in Italy there are 7 subway systems, operating 17 subway lines. +CityNameService openedLast expandedStationsLengthAnnual ridership per km (pax/km)Absolute annual ridership (pax)MilanLine 1196420053826,7 km4,868,914130,000,000MilanLine 2196920113539,9 km3,007,519120,000,000RomeLine A198020002718,4 km5,125,00094,300,000MilanLine 4202220242115 km5,733,33386,000,000MilanLine 3199020112117,3 km4,450,86777,000,000RomeLine B195520152622,9 km2,720,52462,300,000NaplesLine 2192520141218,9 km2,507,93747,400,000NaplesLine 1199320252020,7 km2,144,92844,400,000MilanLine 5201320151912,9 km3,372,09343,500,000TurinLine 1200620212315,1 km2,649,00740,000,000BresciaLine 12013 -1713,7 km1,240,87617,000,000RomeLine C201420252421,2 km783,01916,600,000GenoaLine 11990201287,1 km2,112,67615,000,000CataniaLine 119992024128,7 km804,5987,000,000NaplesLine 1120052009510,2 km127,4511,300,000NaplesLine 62007202485,5 km120,000660,000NaplesLine 72025 -22,5 km - -

References