The Kolkata Metro, in operation since 1984, is the oldest underground mass transit system in India. It spans the north–south length of the city and covers a distance of 25.1 km (16 mi)
Government agencies and private operators run buses, which are the most commonly used mode of transport.
Kolkata is the only Indian city with a tram network, which is operated by the Calcutta Tramways Company. The slow-moving tram services are restricted to certain areas of the city.
Hired public conveyances include yellow metered taxis. Almost all of Kolkata’s taxis are antiquated Hindustan Ambassadors by make; newer air-conditioned radio taxis are also in service.
In parts of the city, cycle rickshaws and hand-pulled rickshaws are patronized by the public for short trips.