The Mass Rapid Transit or MRT is a rapid transit system forming the major component of the railway system in Singapore, spanning the entire city-state. The initial section of the MRT, between Yio Chu Kang and Toa Payoh, opened in 1987, making it the second-oldest metro system in Southeast Asia, after Manila's LRT System. The network has since grown rapidly in accordance with Singapore's aim of developing a comprehensive rail network as the backbone of the public transport system in Singapore, with an average daily ridership of 2.406 million in 2011, approximately 71% of the bus network's 3.385 million in the same period.
The MRT network has 102 stations with 148.9 km (92.52 mi) of lines in operation, on standard gauge. The lines are built by the Land Transport Authority, a statutory board of the Government of Singapore, which allocates operating concessions to the profit-based corporations, SMRT Corporation and SBS Transit. These operators also run bus and taxi services, thus facilitating full integration of public transport services. The MRT is complemented by a small number of regional Light Rail Transit (LRT) network in Bukit Panjang, Sengkang and Punggol that link MRT stations with HDB public housing estates. Services operate from about 5:30 am and usually end before 1 a.m. daily with intervals of approximately three to eight minutes, and services extended during festive periods such as Chinese New Year.