Mumbai Suburban Railway

The Mumbai Suburban Railway (colloquially called local trains or simply locals) consists of exclusive inner suburban railway lines, augmented by commuter rail on main lines serving outlying suburbs to serve the Mumbai Metropolitan Region in India. Spread over 450 kilometres (280 mi), the suburban railway operates 2,342 train services and carries more than 7.5 million commuters daily.

The daily commuters constitute around 40% of the daily commuters of Indian Railways. By annual ridership (2.64 billion), the Mumbai Suburban Railway is one of the busiest commuter rail systems in the world.