The tracks are often built-in subterranean tunnels, particularly in city centres, or on elevated bridges and tunnels above street level, particularly in a city's edges. The Singapore MRT Lines has nearly about 200 kilometres (about 124 miles), divided across six lines with around 120 stops by 2040, the MRT lines are expected to treble in length, reaching about 400 kilometres (about 250 miles). 

 This will be done by extending the present six lines and constructing three new lines. With all its transit lines combined, Singapore's MRT is the most expensive, busiest, oldest, and most comprehensive MRT system in Southeast Asia. It is also noted for having the world's longest stretch of completely automated railway lines with autonomous trains.

 Between 1972 and 1980, the Singapore government conducted a series of mass-transit studies with the assistance of the United Nations Development Programme and the World Bank to assess the system's viability. The first study (1972-1974) advocated a rail-based MRT system to relieve traffic congestion and serve as a method of transportation for moving people across the island, which was echoed in the second study (1974–1976). Furthermore, the second study assessed the cost of constructing the MRT system at S$1.75 billion and suggested that the system consist of two train lines travelling east to west and north to south. The projected MRT route network was enlarged to encompass additional places in the third and final study (1979-1980), and the system's estimated cost was increased to S$3.9 billion.

1)     High frequency of service: trains run at intervals of 2-3 minutes during peak hours, making it easy for passengers to catch a train without waiting long.

2)     Reliability: the MRT system has a high on-time performance record, with trains running on schedule more than 99% of the time.

3)     Convenience: the MRT system covers a large portion of Singapore, making it easy for residents and visitors to travel to most areas of the city quickly and easily.

4)     Affordable: the MRT fares are relatively low compared to other major cities, making it a cost-effective mode of transportation.

5)     Clean and safe: Singapore is known for its cleanliness and safety, and the MRT system is no exception. Trains and stations are kept clean and safe, providing a comfortable and pleasant experience for passengers.

6)     Integration with other modes of transportation: The MRT is well-integrated with other modes of transportation such as buses and taxis, making it easy to transfer between them and reach your destination.

 The advantage of Singapore's MRT system is its high level of efficiency and dependability. The trains adhere to a precise timetable and are well-known for their punctuality. Furthermore, the MRT system is broad and covers a major area of the city-state, allowing commuters to easily reach their destinations. The MRT system is extremely useful for commuters due to its high train frequency and ease of use. The MRT also has a well-connected network, making it simple for passengers to change trains. For example, if I were to compare the cost it would take me about 3 SGD (RM 9.86) to go to Marina Bay from Woodlands and it is cheaper than driving that will cost me 2.70 SGD (RM 8.88) per litre for fuel. The distance from Woodlands to Marina Bay its 26.8 kilometre. As a result, it is proven that taking the MRT is more affordable than driving. 

2)     Limited-service hours: the MRT system closes at around midnight, making it inconvenient for those who need to travel late at night.

3)     Limited coverage: while the MRT system covers a large portion of Singapore, there are still some areas that are not served by the MRT system.

4)     Cost of expansion: the cost of expanding the MRT system can be high, and the construction of new lines and stations can cause inconvenience to residents and businesses in the area.

5)     Limited capacity: the MRT system is reaching its capacity during peak hours, and it is becoming more difficult to add more trains or increase the frequency of service to meet the demand.

6)     Maintenance and breakdowns: The MRT system experiences occasional breakdowns and maintenance, causing inconvenience for the commuters.

7)     Limited accessibility for disabled people: some stations and trains are not fully accessible for people with disabilities, which can be a disadvantage for those who need it.