Public Transport in Mumbai involves the transport of millions of its citizens by train, road and water. Over 88% of the commuters in Mumbai use public transport (suburban trains or buses). It is the most convenient, efficient and cheap form of transport to a population largely without sufficient income to afford cars. Mumbai has the largest organised bus transport network among major Indian cities. But the train network is constantly struggling to cope with the growing population. A train compartment is usually filled with over three times the passengers it was meant for at peak hours, and there have been more than 20,000 deaths in the last five years.[2]

Mumbai's public transport primarily comprises:
Public Bus Service (BEST):
This system is run by a government organization Brihanmumbai Electric Supply and Transport, the "B" formerly standing for "Bombay". It has a fleet of red single and double-decker buses. There are air conditioned and low floor buses as well.
New BRTS is planned and work is to begin from January 2009.

NMMT-Navi Mumbai Municipal Transport operates its Volvo buses from Navi Mumbai to Bandra,Borivali and Dindoshi.

Suburban Electric Trains: Local Railway Lines
Western Railway, running between Churchgate and Virar. There are plans to extend this service upto Dahanu in near future.
Central Railway, running between Chhatrapati Shivaji Terminus (Formerly known as Victoria Terminus [V.T.]) and Karjat/Khopoli and Kasara.
Harbour Line, running between Chhatrapati Shivaji Terminus (Formerly known as Victoria Terminus [V.T.]) and Panvel / Andheri. A new line has extended the Harbour Line from Panvel to Karjat.
Harbour Line, running between Vashi and Thane (via Turbhe)

Public Taxi/Autorickshaw Services:
Black and yellow metered taxis
Radio Taxis: Silver Green run by Meru and Yellow Red by Gold cabs and Black by Mega cabs.
Blue and silver airconditioned metered taxis known as Cool Cabs
Black and yellow metered Autorickshaws which are not allowed in the Central area (between Colaba & Mahim in the West and Colaba and Sion in the East) of the city.

Waterway Services:
Ferry services connect Vashi (in Navi Mumbai) to the Gateway of India.
Ferry services are available to visit Elephanta Caves and to nearby places such as Alibaug, Rewas and Mandwa.
Ferry services is also available in northern Mumbai, across the Manori Creek. The barges operate at regular intervals across the shallow creek linking Manori to Malad
Ferry also connects Versova and Madh Island