The decision to build an MRT train system was reached following a 1981 study by the government on the public transport network, which concluded that an all-bus system was not workable due to traffic congestion. The construction of the MRT transport system began in 1983 and the first trains began operations in 1987. By 1990, the North South and East West train lines were fully completed. The MRT network has expanded over the years to include the North East and Circle Lines, and is now a crucial part of Singapore’s public transport system.