MTR Corporation Limited is a majority government-owned public transport operator and property developer in Hong Kong which operates the Mass Transit Railway, the most popular public transport network in Hong Kong. It is listed on the Hong Kong Exchange and is a component of the Hang Seng Index. The MTR additionally invests in railways across different parts of the world, including franchised contracts to operate rapid transit systems in London, Stockholm, Beijing, Hangzhou, Taipa, Shenzhen, Sydney, and a suburban rail system in Melbourne.

Public transport is a system of transport for passengers by group travel systems available for use by the general public unlike private transport, typically managed on a schedule, operated on established routes, and that may charge a posted fee for each trip. There is no rigid definition of which kinds of transport are included, and air travel is often not thought of when discussing public transport—dictionaries use wording like "buses, trains, etc." Examples of public transport include city buses, trolleybuses, trams and passenger trains, rapid transit and ferries. Public transport between cities is dominated by airlines, coaches, and intercity rail. High-speed rail networks are being developed in many parts of the world.