The document provides information about several metro systems around the world, including Moscow, Shanghai, Miami, Toronto, Delhi, Chennai, Algiers, and Cairo. It discusses key details about each system such as the year they opened, lines and stations, ridership, operational specifics, and construction approaches. The metro systems described vary in size and scope, with Moscow having the most extensive network and Shanghai seeing the highest annual ridership numbers. Funding and construction of the different metros involved government bodies and private partnerships.