North South MRT Line

From Wikipedia, the free encyclopedia
Jump to: navigation, search
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)
At-Grade (Bishan)
Underground (Braddell - Marina South Pier)
Depot(s) Bishan
Ulu Pandan
Rolling stock C151, C651, C751B, C151A, C151B(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 80 kilometres per hour (50 mph)
Route map
 NS1  EW24  Jurong East
Pasir Ris
  Joo Koon
Pan Island Expressway
 NS2  Bukit Batok
 NS3  Bukit Gombak
 NS4  BP1  Choa Chu Kang
Kranji Expressway
 NS5  Yew Tee
 NS7  Kranji
Woodlands Flyover
Bukit Timah Expressway
 NS8  Marsiling
 NS9  TE2  Woodlands
Sungei Bedok
  Woodlands North
 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
  Dhoby Ghaut
 NS17  CC15  Bishan
 NS18  Braddell
 NS19  Toa Payoh
 NS20  Novena
Bukit Panjang
  Sungei Bedok
 NS21  DT11  Newton
Woodlands North
 NS22  TE14  Orchard
Sungei Bedok
 NS23  Somerset
 NS24  NE6  CC1  Dhoby Ghaut
  Pasir Ris
 NS25  EW13  City Hall
Singapore River
 NS26  EW14  Raffles Place
Joo Koon
 NS27  CE2  TE20  Marina Bay
Woodlands North
  Sungei Bedok
 NS28  Marina South Pier
The North South Line is coloured red in the MRT system map.
Station names of the North South Line.

The North South Line (NSL) is the first Mass Rapid Transit (MRT) line in Singapore. The line is 44 kilometres (27 mi) long with 27 stations, including the recently opened North South Line Extension and a planned station, Canberra. Travelling from one end of this line to the other end takes about one hour, and this 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. Not everybody takes the long journey of the line from Jurong East to either Marina Bay and Marina South Pier.

The North South Line starts at Jurong East, where it interchanges with the East West Line from Platforms D & E which are always operational, unlike Platforms A & B which are only operational during peak periods. It merges into the assigned direction, just between Jurong East Street 21 and Jurong East Avenue 1. Then, the train goes all the way to Bukit Batok, and after that it emerges into the short tunnel at the hilltop, and subsequently it goes into the Bukit Gombak. After that it goes all the way to Choa Chu Kang, and crosses through Brickland Road and the short underpass at Choa Chu Kang Avenue 1. The name is originally coined from the Branch Line.

The Woodlands Extension extends from Choa Chu Kang and goes all the way to Kranji. After that, it had a short underpass that had to cross through the Woodlands Avenue 3 with the exception of the short open air section while still retaining tunnel walls. After that it goes all the way to Marsiling, and it elevates through towards Yishun. From here it had their middle tracks at Woodlands and Yishun.

The original North South Line starts from Yishun, and goes all the way to Khatib, and then after that it descends through the Lentor Avenue, and emerges again into the Yio Chu Kang. After that it descends into the surface, and eventually it will go into Ang Mo Kio, where the level 1 remains as a storeroom access that is only accessible from the paid areas of Ang Mo Kio. After that it descends into Bishan, where it interchanges with the Circle Line, and the platforms are at the basement 1, the only station in the NSEWL that had the concourse level on the ground floor. After that, it goes all the way to Braddell, where the curvature is different including Toa Payoh, and after that it will pass through the Orchard Road area. Cross-platform interchange with the East West Line is only possible again at City Hall and Raffles Place. After that, few trains and on several days, it will terminate at Marina Bay, the other trains will terminate at Marina South Pier.

In addition, it also takes commuters to various places (such as Orchard Road), schools (such as Republic Polytechnic and Nanyang Polytechnic) and attractions (such as Singapore Zoo and Sungei Buloh Nature Reserve).


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. Separate operation of the North South and East West Lines only started in 4 November 1989, when the extension to Marina Bay was opened.

Second phase of development (Woodlands Extension)[edit]

During the initial planning of the Woodlands Extension MRT 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.[1]

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.[2] It has been in use since 27 May 2011.[3] Originally it opened from 7am to 9am, this was expanded from 27 December 2011 and it also opens during the evening peak hour.[4]

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.[5] The extension serves the Marina Bay Cruise Centre Singapore in Marina Bay.

Half-height platform screen door installations[edit]

There were calls for platform screen doors to be installed at above-ground stations after several incidents in which passengers were killed by oncoming trains when they fell onto the railway tracks at above-ground stations. Underground stations already featured the doors since 1987. The authorities initially rejected the proposal by casting doubts over functionality and concerns about the high installation costs,[6] but made an about-turn when the government announced plans to install half-height platform screen doors on the above-ground stations in January 2008, citing lower costs due to it becoming a more common feature worldwide.[7] They were first installed at Jurong East and Yishun stations in 2009 as trial runs.[8]

Installation began on May 2011 at Ang Mo Kio MRT Station, and by 14 March 2012, Kranji MRT Station, the last station for installation began operational (and please refer to the elevated MRT stations for more details on "installation of half-height platform screen doors").[9]

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 resume at 11.40pm.[10][11]

On 17 December 2011, a similar fault caused a 7-hour disruption between Ang Mo Kio and Marina Bay stations.[12][13] 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.[14]

These two service disruptions on the North-South Line were the second worst ever since SMRT started operation for 24 years since 1987.[15]

On July 7 2015, 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 complete and the cause has been narrowed down to damaged insulators which failed to supply power properly.

Timber to concrete sleeper replacement works[edit]

Timber sleepers are designed to last 15 to 25 years. 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 will allow trains to move along the tracks smoothly and without the current speed restrictions. Passengers can look forward to safe, smoother and faster train rides. In view of this, SMRT had to adjust last train timings earlier on the North South Line. It is expected to be completed by end-April 2015, and was divided into three phases: Phase 1 (Marina Bay-Bishan), Phase 2 (Bishan-Admiralty) and Phase 3 (Admiralty-Jurong East). Marina South Pier was exempted from the sleeper replacement work as it is a new station. After the completion of sleeper replacement works, the last train timings remains unchanged.

Canberra Station[edit]

On 27 April 2015, construction started on Canberra Station which will be build along an operational section of the line. 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 Simpang New Town.



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

Rolling stock[edit]

Trains operating on the line are the C151s, C651s, C751Bs, C151As and in 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 a Fixed Block Signalling System with ATP by Westinghouse, and is currently phasing out the old signalling system and installing a new SelTrac® CBTC moving block signalling system by Thales [16] The new signalling system is expected to be operational by 2016 and trains will run in GOA 2 mode. Thales Nettrac MT will be installed for the ATS and OCC of the network. 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. ^ Woodlands MRT line | Infopedia
  2. ^[dead link]
  3. ^ "New Platform At Jurong East Station To Open On 27 May". Land Transport Authority of Singapore. 16 May 2011. Retrieved 2014-11-22. 
  4. ^ Jurong East station opens new platform – Channel NewsAsia
  5. ^ "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. 
  6. ^ "Safety at MRT and LRT Stations — Respect The Yellow Line" (Press release). Land Transport Authority. 20 November 2005. Archived from the original on March 2, 2012. 
  7. ^ "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. 
  8. ^ Yeo Ghim Lay (3 September 2008). "Platform doors for elevated MRT stations". The Straits Times. p. 26. 
  9. ^ "LTA Completes Installation of Half Height Platform Screen Doors". Land Transport Authority. 14 March 2012. Retrieved 2013-11-16. 
  10. ^ "North-South MRT Line breakdown hits thousands". Channel News Asia. 15 December 2011. Retrieved 2012-03-17. 
  11. ^ "2nd Update – SMRT statement : Service disruption on North-South Line (Northbound): Marina Bay Station to Bishan Station" (PDF). 
  12. ^ "MRT breaks down again". Channel NewsAsia. 17 December 2011. 
  13. ^ "North-South Line service resumes after 7-hour disruption". Channel NewsAsia. 17 December 2011. 
  14. ^ "Service disruption on North-South Line on 17 Dec 2011" (PDF). 
  15. ^ "Minister Updates Parliament on MRT Disruptions". Ministry Of Transport. 9 January 2012. 
  16. ^ Thales awarded signalling contracts for Singapore North-South, East-West lines and Tuas West Extension

External links[edit]