|Station Count||30 (Operational)
3 (Under Construction)
|Line length||35.5 km (Operational)
4 km (Under Construction)
|Depot||Kim Chuan Depot|
|Rolling stock||Alstom Metropolis C830
Alstom Metropolis C830C
Alstom Metropolis C851E
|Electrification||750 V DC third rail|
|Track gauge||Standard Gauge (1435mm)|
|Opened||28 May 2009 (Stage 3)
17 Apr 2010 (Stage 1 & 2)
08 Oct 2011 (Stage 4 & 5)
14 Jan 2012 (CCLe)
Year 2026 (Stage 6)
The Circle Line (CCL) is an underground, driverless, medium-capacity MRT line and the fourth rail line in Singapore, running an orbital route through residential areas and linking all radial routes leading to the city. The line is currently 35.5 km long with 30 stations, running from Dhoby Ghaut (CC1) to HarbourFront (CC29) via Serangoon. A separate branch line known as the Circle Line Extension links Promenade (CC4) to Marina Bay (CE2) via Bayfront (CE1).
The line is also the first medium-capacity rail line in Singapore, with trains operating in a three-car formation, half as long as the usual six-car formation used on previous lines. The rolling stock is based out of Kim Chuan Depot, touted as the largest fully-underground train depot in the world.
A future line extension, the ‘Circle Line Stage 6‘ will complete the Circle Line, closing the circular route between HarbourFront and Marina Bay with 3 additional stations and scheduled for completion in 2026.
Timeline & History
- 28 May 2009: Opening of Circle Line Stage 3, with trains running between Bartley and Marymount stations
- 17 Apr 2010: Opening of Circle Line Stages 1 & 2, with trains running between Dhoby Ghaut and Marymount stations
- 8 Oct 2011: Opening of Circle Line Stages 4 & 5, with trains running between Dhoby Ghaut and HarbourFront stations
- 14 Jan 2012: Opening of Circle Line Extension, connecting Promenade to Marina Bay via Bayfront
The Circle Line was planned as an orbital line linking all existing rail lines, allowing commuters to transfer between rail lines while avoiding the city centre, with interchanges at Paya Lebar, Serangoon, Bishan and Buona Vista. The southern reaches of the line would connect to the City centre. Construction work began in 2002-2003 and the line was constructed in 5 stages, along with Kim Chuan Depot, a fully underground train depot providing maintenance and stabling facilities for the Circle Line running stock.
Originally scheduled to open progressively from 2006 till 2010, the Nicoll Highway collapse of 2004 delayed the opening of Stages 1 and 2, resulting in the unaffected Stage 3 opening for revenue service first on 28 May 2009. A new Nicoll Highway station, two-thirds the size of the original station, was built a short distance away from the old station. Stages 1 and 2 eventually opened on 17 Apr 2010, opening up new connections to the Bras Basah and Marina Centre area.
Stages 4 & 5 opened a year later, on 8 Oct 2011, bringing the line to HarbourFront. Caldecott and Haw Par Villa stations, previously planned as shell stations, were built as normal stations and opened along with the rest of the line. That left Bukit Brown as the only remaining shell station on the Circle Line, awaiting future developments in the Bukit Brown area. Presently, its facilities are used as emergency escape shafts.
- CC1NS24NE6 Dhoby Ghaut
- CC2 Bras Basah
- CC3 Esplanade
- CC4DT15 Promenade
- CC5 Nicoll Highway
- CC6 Stadium
- CC7 Mountbatten
- CC8 Dakota
- CC9EW8 Paya Lebar
- CC10DT26 MacPherson
- CC11 Tai Seng
- CC12 Bartley
- CC13NE12 Serangoon
- CC14 Lorong Chuan
- CC15NS17 Bishan
- CC16 Marymount
- CC17TE9 Caldecott
- CC19DT9 Botanic Gardens
- CC20 Farrer Road
- CC21 Holland Village
- CC22EW21 Buona Vista
- CC23 one-north
- CC24 Kent Ridge
- CC25 Haw Par Villa
- CC26 Pasir Panjang
- CC27 Labrador Park
- CC28 Telok Blangah
- CC29NE1 Harbourfront
- CE1DT16 Bayfront
- CE2NS27TE20 Marina Bay
The station code CC18 is reserved for a future infill station at Bukit Brown.
Circle Line Stage 6 stations (by Year 2026):
- CC30 Keppel
- CC31 Cantonment
- CC32 Prince Edward Road
- CC18 Bukit Brown
Currently a shell station, expected to open with the further development of Bukit Brown.
Station Code Change for Circle Line Stage 6
In the Future Network Map (March 2020 version) by the Land Transport Authority, the station codes for both Bayfront and Marina Bay are indicated as CC34DT16 and CC33NS27TE20 respectively, indicating that the new station codes will take effect after the opening of the Circle Line Stage 6.
The Circle Line uses electric multiple unit (EMU) trains operating in a three-car configuration, with four doors per side on each carriage.
|Train||Quantity||Entered Service||Manufacturer||Built at|
|Alstom Metropolis C830||40||May 2009||Alstom||Valenciennes, France|
|Alstom Metropolis C830C||24||June 2015||Shanghai Alstom Transport||Shanghai, China|
|Alstom Metropolis C851E (CCL)||23||TBA||Alstom||Barcelona, Spain|
Alstom Metropolis C830 trainsets were the first generation of trains to serve the Circle Line. A total of 40 trainsets were ordered as part of turnkey Contract C830, with four doors per side, and are stabled at Kim Chuan Depot. They are built in France by Alstom between 2006–2008.
Shanghai Alstom Metropolis C830C trainsets were ordered to increase the capacity of the Circle Line. A total of 24 trainsets were ordered, as part of Contract C830C, and are also stabled at Kim Chuan Depot. Largely similar in design to their C830 cousins, these trains are built in China by Shanghai Alstom Transport Co. Ltd., a joint venture between Alstom and Shanghai Electric, between 2014–2015.
Alstom Metropolis C851E trainsets were ordered to increase the capacity of the Circle Line ahead of the opening of the Circle Line Stage 6. A total of 23 trainsets were ordered, with trains manufactured and assembled by Alstom in Barcelona, Spain.
The Circle Line is equipped with the Alstom Urbalis 300 Communications-based train control (CBTC) signalling system. Trains operate fully automatically (GoA level 4; unattended train operation), but SMRT Trains elects to have a train attendant onboard in case of emergencies.
- Nicoll Highway Collapse – see CC5 Nicoll Highway
Circle Line 6 Upgrades
In preparation for the opening of Circle Line Stage 6 in 2026, LTA and SMRT have embarked on a series of system enhancements to the existing Circle Line (as of July 2019).
These upgrades include:
- Signalling System
- Power Supply System
- Hardware and software of the communications system and the integrated supervisory control system (ISCS)
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