North South MRT Line

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North South MRT Line
Laluan MRT Utara Selatan
வடக்கு தெற்கு எம்ஆர்டி வழி
MRT map NS.svg
The North South Line is coloured red on system maps.
Type Rapid transit
System Mass Rapid Transit (Singapore)
Status Operational
Termini Jurong East
Marina Bay
Marina South Pier
Stations 27 , (excluding 1 reserved station in Sungei Kadut)
Services 1
Opened 7 November 1987
Owner Land Transport Authority
Operator(s) SMRT Trains (SMRT Corporation)
Character Elevated (Jurong East - Ang Mo Kio)
Sub-Surface (Bishan)
Underground (Braddell - Marina South Pier)
Depot(s) Bishan
Ulu Pandan
Rolling stock C151, C651, C751B, C151A, C151B(Future), C151C(Future)
Line length 44 km (27 mi)
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge
Electrification 750 V DC Third rail
Operating speed limit of 78 kilometres per hour (48 mph)
Route map
 NS1  EW24  Jurong East
Left arrow Pasir Ris
  Joo Koon Right arrow
Pan Island Expressway
 NS2  Bukit Batok
 NS3  Bukit Gombak
Left arrow Fajar
 NS4  BP1  Choa Chu Kang
Kranji Expressway
 NS5  Yew Tee
 NS7  Kranji
Woodlands Flyover
Bukit Timah Expressway
 NS8  Marsiling
 NS9  TE2  Woodlands
Left arrow Sungei Bedok
  Woodlands North Right arrow
 NS10  Admiralty
 NS11  Sembawang
 NS12  Canberra
 NS13  Yishun
 NS14  Khatib
Lentor Flyover
Seletar Expressway
 NS15  Yio Chu Kang
 NS16  Ang Mo Kio
Bishan Depot
Kallang River
Left arrow HarbourFront
  Dhoby Ghaut Right arrow
 NS17  CC15  Bishan
 NS18  Braddell
 NS19  Toa Payoh
 NS20  Novena
Left arrow Bukit Panjang
  Chinatown Right arrow
 NS21  DT11  Newton
Left arrow Woodlands North
 NS22  TE14  Orchard
Left arrow Sungei Bedok
 NS23  Somerset
Left arrow HarbourFront
  Punggol Right arrow
 NS24  NE6  CC1  Dhoby Ghaut
  HarbourFront Down arrow
  Pasir Ris Right arrow
 NS25  EW13  City Hall
Singapore River
 NS26  EW14  Raffles Place
Left arrow Joo Koon
 NS27  CE2  TE20  Marina Bay
Left arrow HarbourFront
  Stadium Right arrow
Left arrow Woodlands North
  Sungei BedokRight arrow
 NS28  Marina South Pier
The North South Line is coloured red in the MRT system map.

The North South Line (NSL) is the first Mass Rapid Transit (MRT) line in Singapore which stretches from Jurong East to Marina South Pier. The line is 44 kilometres (27 mi) long with 27 stations, including Canberra, which is under construction.[1] Travelling from one end of this line to the other end takes about one hour. The line is coloured red on the rail map.


As the name implies, the line connects central Singapore to both northern and southern parts of the island.

In the clockwise direction, the North South Line starts at Jurong East, where cross-platform interchange with the East West Line is possible. The line then passes through Choa Chu Kang, where it interchanges with the Bukit Panjang LRT, and Woodlands, where it will interchange with the Thomson-East Coast Line from 2019. Going further south, the North South Line passes through Bishan, where it interchanges with the Circle Line.[2]

In the city, the North South Line interchanges with the Downtown Line at Newton. It then passes through Orchard at the western end of Orchard Road, where it will interchange the Thomson-East Coast Line from 2021. At the eastern end of Orchard Road, it interchanges with the North East Line and the Circle Line at Dhoby Ghaut. Cross-platform interchange with the East West Line is possible at City Hall and Raffles Place.

Most southbound trains terminate at Marina Bay, where one can transfer to the Circle Line, and from 2021, the Thomson-East Coast Line. Some trains however, terminate at Marina South Pier.


First phase of development[edit]

The North South line was the first MRT line in Singapore, with the first section from Yio Chu Kang to Toa Payoh opening on 7 November 1987. Nine more stations from Novena to Outram Park followed on 12 December 1987, with through service onto what is today the East West Line. The northern terminal was extended to Yishun on 20 December 1988 when Yishun and Khatib stations opened. Separate operation of the North South and East West Lines only started on 4 November 1989, when the extension to Marina Bay was opened.

Second phase of development (Woodlands Extension)[edit]

After the Branch Line opened in 1990, the Woodlands Extension MRT line was envisioned to close the gap between Yishun and Choa Chu Kang. During the initial planning of the line, Sembawang station was only intended as a provisional station to be built at a later date due to the underdevelopment of the town and Kranji station was not planned. But on the second round of planning, the government decided to build these station and omit Sungei Kadut station from the plan. Sungei Kadut station will be built later if the town's population justifies the necessity for the station.[3] With the completion of the Woodlands Extension in 1996, the Branch Line became part of the North South Line and ceased to exist.

Jurong East Modification Project (JEMP)[edit]

The Jurong East Modification Project consisted of the construction of a new platform and the addition of a fourth track to Jurong East Station.[4] It has been in use since 27 May 2011.[5] Originally it opened from 7am to 9am, this was expanded from 27 December 2011 and it also opens during the evening peak hour.[6]

North South Line Extension (NSLe)[edit]

A 1-kilometre (0.6 mi), one station extension from Marina Bay to Marina South Pier station was opened on 23 November 2014, one year earlier than originally planned.[7] The extension serves the Marina South Pier and the Marina Bay Cruise Centre Singapore in Marina Bay.

Canberra station[edit]

Main article: Canberra MRT Station

On 27 April 2015, construction started on Canberra Station (NS 12) which will be built along an operational section of the line and costing S$90 million.[8] Similar to Dover Station, the station platform will be of an elevated side platform layout. Construction is expected to be completed by 2019 to serve the upcoming developments near the station.[9]

Installation of half-height platform screen doors[edit]

After the government announced plans to install half-height platform screen doors on the above-ground stations in January 2008,[10] they were first installed at Jurong East and Yishun stations in 2009 as trial runs.[11] Subsequently, installation began in May 2011 at Ang Mo Kio MRT Station. By 14 March 2012, Kranji MRT Station was the last station to put the platform screen doors into operation.[12]

Timeline of stations opened[edit]

Improvement Works[edit]

Timber to concrete sleeper replacement works[edit]

Timber sleepers are designed to last 15 to 25 years, and they have to be replaced when they are near the end of their lifespan, or when they show signs of significant wear and tear. The new sleepers installed will allow trains to move along the tracks smoothly and without the current speed restrictions. In order to carry out works at night when trains are not operational, train services were ended earlier on the North South Line. The sleeper replacement work was divided into three phases: Phase 1 (Marina Bay-Bishan), Phase 2 (Bishan-Admiralty) and Phase 3 (Admiralty-Jurong East), and were completed in April 2015. Marina South Pier station was exempted from the sleeper replacement work as it was recently built. After the completion of sleeper replacement works, the last train timings reverted to the original timings before the replacement works.

Resignalling works[edit]

A new signalling system, supplied by Thales, will replace the current aging signalling system on the North South Line. The new signalling system, costing $195 million, will reduce waiting times for trains during peak periods from the current 120 seconds to 100 seconds. The new system is expected to be operational by 2017. MRT trains are also progressively being retrofitted with new equipment on board to be compatible with the new signalling system

Third-rail replacement[edit]

Replacement works on the third rail, which provides electricity to the trains, are ongoing. A new third rail is being installed to replace the current one in use since 1987 and this will increase reliability of the electrical system.

Line disruptions[edit]

On 15 December 2011, services between Bishan and Marina Bay stations were suspended due to 40 metres of the power rail being damaged between City Hall and Dhoby Ghaut stations. Trains along the stretch were stalled, causing a disruption to the train service for almost 5 hours. Train service fully resumed at 11.40pm.[13][14]

On 17 December 2011, a similar fault caused a 7-hour disruption between Ang Mo Kio and Marina Bay stations.[15][16] According to SMRT, the disruption was caused by damage to the third rail and the trains' collector shoes. Seven trains were damaged in this incident.[17]

These two service disruptions on the North-South Line were the second worst ever since SMRT started operation for 24 years since 1987.[18]

On July 7, 2015, the NSEWL was shut down due to massive power trips detected along the two lines. This was the worst breakdown in history after the December 2011 issue. Investigations have been completed and the cause has been narrowed down to damaged insulators which failed to supply power properly.


Station Number Station Name Interchange/Notes
 NS1  EW24  Jurong East Change for the East West Line
 NS2  Bukit Batok  
 NS3  Bukit Gombak  
 NS4  BP1  Choa Chu Kang Change for the Bukit Panjang LRT
 NS5  Yew Tee  
 NS6  Reserved Station (reserved for future use)
 NS7  Kranji  
 NS8  Marsiling  
 NS9  TE2  Woodlands Change for the Thomson-East Coast Line (2019)
 NS10  Admiralty  
 NS11  Sembawang  
 NS12  Canberra (under construction)
 NS13  Yishun
 NS14  Khatib  
 NS15  Yio Chu Kang  
 NS16  Ang Mo Kio  
 NS17  CC15  Bishan Change for the Circle Line
 NS18  Braddell
 NS19  Toa Payoh  
 NS20  Novena  
 NS21  DT11  Newton Change for the Downtown Line
 NS22  TE14  Orchard Change for the Thomson-East Coast Line (2021)
 NS23  Somerset
 NS24  NE6  CC1  Dhoby Ghaut Change for the North East Line or Circle Line
 NS25  EW13  City Hall Change for the East West Line
 NS26  EW14  Raffles Place Change for the East West Line
 NS27  CE2  TE20  Marina Bay Change for the Circle Line or Thomson-East Coast Line (2021)
 NS28  Marina South Pier

The North South Line's numbering scheme reserves station code "NS6" between Yew Tee (NS5) and Kranji (NS7) for future use. Notes: Every fourth southbound train will terminate at the actual terminus Marina South Pier while the others terminate at Marina Bay, for example;[citation needed]

1st train:Marina Bay 2nd train:Marina Bay 3rd train:Marina Bay 4th train:Marina South Pier

Rolling stock[edit]

Trains operating on the line are the C151s, C651s, C751Bs, C151As and the future C151Bs. These trains operates from the Bishan Depot which serves maintenance and train overhaul facilities for trains along the North South Line. The trains can also crossover to the East West Line as both the North South Line and East West Line are built as one system operating two different lines at both Jurong East and Raffles Place.

Train control[edit]

The North South Line is currently equipped with Westinghouse fixed block signalling system with Automatic train control with Automatic train control (ATC) under Automatic train operation (ATO) GoA 2 (STO). The subsystems consist of Automatic train protection (ATP) to govern train speed, Automatic Train Supervision (ATS) to track and schedule trains and a Relay interlocking system that prevents incorrect signal and track points to be set.

The existing signalling system is currently phasing out and will be replaced by a new Thales SelTrac® Communications-based train control (CBTC) moving block signalling system[19]

The new signalling system is expected to be operational by Q1 2017 and trains will run with Automatic train control (ATC) under Automatic train operation (ATO) GoA 2 (STO)[20] . The subsystems consist of Automatic train protection (ATP) to govern train speed, NetTrac MT Automatic Train Supervision (ATS) to track and schedule trains and a Computer-based interlocking (CBI) system that prevents incorrect signal and track points to be set.

Automatic platform screen doors by Westinghouse were originally installed when the line opened and Automatic Platform Screen Gates were installed at a later date on elevated stations.


  1. ^ "North-South Line". Land Transport Authority. Retrieved 2015-12-24. 
  2. ^ "North South Line". Retrieved 2016-09-27. 
  3. ^ Woodlands MRT line | Infopedia
  4. ^ Archived from the original on February 12, 2012. Retrieved January 31, 2012.  Missing or empty |title= (help)
  5. ^ "New Platform At Jurong East Station To Open On 27 May". Land Transport Authority of Singapore. 16 May 2011. Retrieved 2014-11-22. 
  6. ^ Jurong East station opens new platform – Channel NewsAsia
  7. ^ "SPEECH BY MR RAYMOND LIM,MINISTER FOR TRANSPORT, AT THE VISIT TO KIM CHUAN DEPOT, 25 JANUARY 2008, 9.00 AM" (PDF). Singapore Government Media Release. 2008-01-25. 
  8. ^ "Work starts on Canberra MRT station". Channel NewsAsia. Retrieved 2016-03-03. 
  9. ^ "Canberra Station | Projects | Public Transport | Land Transport Authority". Retrieved 2016-03-03. 
  10. ^ "Platform screen doors for all above-ground MRT stations by 2012". The Straits Times. 25 January 2008. Archived from the original on 2008-01-28. 
  11. ^ Yeo Ghim Lay (3 September 2008). "Platform doors for elevated MRT stations". The Straits Times. p. 26. 
  12. ^ "LTA Completes Installation of Half Height Platform Screen Doors". Land Transport Authority. 14 March 2012. Retrieved 2013-11-16. 
  13. ^ "North-South MRT Line breakdown hits thousands". Channel News Asia. 15 December 2011. Retrieved 2012-03-17. 
  14. ^ "2nd Update – SMRT statement : Service disruption on North-South Line (Northbound): Marina Bay Station to Bishan Station" (PDF). 
  15. ^ "MRT breaks down again". Channel NewsAsia. 17 December 2011. 
  16. ^ "North-South Line service resumes after 7-hour disruption". Channel NewsAsia. 17 December 2011. 
  17. ^ "Service disruption on North-South Line on 17 Dec 2011" (PDF). 
  18. ^ "Minister Updates Parliament on MRT Disruptions". Ministry Of Transport. 9 January 2012. 
  19. ^ Thales awarded signalling contracts for Singapore North-South, East-West lines and Tuas West Extension
  20. ^

External links[edit]