Public transport includes buses, trolleybuses, trains, trams, underground/subway systems, and taxis. The document discusses the types of public transportation in Prague, London, and New York. It outlines the advantages of public transport being cheaper and allowing you to meet people, while the disadvantages include crowds, dirtiness, and delays. Underground systems are described as the fastest means of transport in cities like Prague, London, and New York. Details are provided about the Prague, London, and New York underground networks as well as facts about London black taxis and New York yellow cabs.