https://en.wikipedia.org/wiki/List_of_North_American_rapid_transit_systems_by_ridership ,
https://en.wikipedia.org/wiki/List_of_North_American_light_rail_systems_by_ridership#Systems ,
https://en.wikipedia.org/wiki/List_of_United_States_light_rail_systems_by_ridership#List
LRT, LRV, Trams & Metro trains
https://en.wikipedia.org/wiki/Light_rail#Types ,
https://en.wikipedia.org/wiki/Tram#Electric ,
https://en.wikipedia.org/wiki/Tramways_in_%C3%8Ele-de-France ,
https://en.wikipedia.org/wiki/Streetcars_in_New_Orleans#Current_lines ,
https://en.wikipedia.org/wiki/Coast_Tram_(Belgium)
https://en.wikipedia.org/wiki/Passenger_rail_terminology#Heavy_rail
https://jf-databits.blogspot.com/search?q=urban+rail
