The Mass Transit Railway system, known locally by the initialism MTR, is a rapid transit system in Hong Kong and the territory's principal mode of railway transportation. Operated by the MTR Corporation (MTRCL), it consists of heavy rail, light rail and feeder bus services, centred around a 10-line rapid transit network, serving the urbanised areas of Hong Kong Island, Kowloon, and the New Territories. The system encompasses 245.3 km (152.4 mi) of railways, as of December 2022, with 179 stations—including 99 heavy rail stations, 68 light rail stops and 1 high-speed rail terminus.