Local Trains are the major source of transport in Mumbai. This network of Railways has three lines, namely the Western Line, the Central Main Line and the Harbour Line. Mumbai is totally covered by local train network. The area from Churchgate to Virar is covered under the Western line via Western Suburbs, while the Central Main Line starts from Chhatrapati Shivaji Terminus (CST) and travels to Kalyan through the Central Suburbs and Thane. All the local trains start operations usually after 04:00 hours in the morning and close maximum by 01:00 hours. Traveling in second class is definitely very cheap, but it is exceptionally crowded.