The Mumbai Suburban Railway (Marathi: मुंबई उपनगरीय रेल्वे) (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. Spread over 390 kilometres (240 mi), the suburban railway operates 2,342 train services and carries more than 7.5 million commuters daily.