Cross Island Line

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Cross Island Line
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Construction works at Serangoon North station.
Overview
Native nameTemplate:Langx
Chinese: 跨岛地铁线
Template:Langx
StatusPage Template:Plainlist/styles.css has no content.
  • Under construction (Phase 1-2 & Punggol Extension)
  • Under planning (Phase 3 & extension to Changi Terminal 5)
OwnerLand Transport Authority
LocaleSingapore
TerminiPage Template:Plainlist/styles.css has no content.
StationsPage Template:Plainlist/styles.css has no content.
  • 12 (Phase 1)
  • 6 (Phase 2)
  • 1 (Changi Terminal 5 Extension)
  • 3 (Punggol Extension)
Color on mapTemplate:Rcb Lime (#Template:Rcr)
Service
TypeRapid transit
SystemMass Rapid Transit (Singapore)
Services3
Operator(s)TBA
Depot(s)Changi East
Rolling stockCRRC Qingdao Sifang CR151
History
Planned openingPage Template:Plainlist/styles.css has no content.
  • Script error: No such module "Date time". (CRL1)
  • Script error: No such module "Date time". (CRL2)
  • late-Script error: No such module "Date time".s (CRL3)
  • Script error: No such module "Date time". (CPE)
  • mid-Script error: No such module "Date time".s (extension to Changi Terminal 5)
Technical
Line lengthScript error: No such module "ConvertIB".Page Template:Plainlist/styles.css has no content.
  • 29 km (18 mi) (Phase 1)
  • 15 km (9.3 mi) (Phase 2)
  • 13 km (8.1 mi) (Phase 3 approximate)
  • 7.3 km (4.5 mi) (Punggol Extension)
  • 5.8 km (3.6 mi) (Changi Terminal 5 extension)
  • 70 km (43 mi) (Total approximate)
Track lengthScript error: No such module "ConvertIB".
CharacterFully underground
Track gauge1,435 mm (Page Template:Fraction/styles.css has no content.4 ft 8+12 in) standard gauge
Minimum radiusScript error: No such module "ConvertIB".
ElectrificationTemplate:1,500 V DC[1]
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Maps
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The Cross Island Line (CRL) is a high-capacity Mass Rapid Transit (MRT) line currently under construction in Singapore. It will run in an eastwest direction across the planning areas of Changi to Pioneer, passing through Pasir Ris, Hougang, Serangoon, Ang Mo Kio, Bukit Timah, Clementi, Jurong East and Boon Lay. From Pasir Ris, a branch of the line will extend to Punggol.[2] Once fully operational, the roughly 70-kilometre (43 mi) line will replace the East–West Line (EWL) as the longest line on the MRT network, serving approximately 27 stations.[3] It will utilise the CRRC Qingdao Sifang CR151 electric multiple unit (EMU), running in a six-car formation. However, to cater to future demand, stations on the line will be built to accommodate eight-car trains.

Plans for the CRL were first announced in 2013. It is envisioned to serve various key hubs including the Jurong Lake District and the Punggol Digital District, offering an alternative east–west connection to alleviate passenger load on the EWL. Shortly after the announcement, some nature groups called for the diversion of CRL tunnels away from the Central Catchment Nature Reserve (CCNR). Despite the calls, the government decided to continue with the original direct route in 2019, citing commuting time, economic factors and long-term energy consumption. The alignment and stations of Phase 1 were finalised in 2019, followed by the Punggol branch in 2020 and Phase 2 in 2022.[4] The proposed full line is expected to have a daily ridership of over one million in the long term,[5] and to cost an estimated S$40.7 billion.[6]

History

Announcement

The Cross Island Line was first announced by then Transport Minister Lui Tuck Yew on 17 January 2013. The line was planned to relieve congestion on the existing East–West Line and slated to begin at Changi on Singapore's eastern coast, passing through the major eastern towns including Pasir Ris, Hougang and Ang Mo Kio. From this point, it would proceed further west toward Bukit Timah, Clementi and West Coast, before terminating in the Jurong Industrial Estate. A branch line was to connect the mainline to Punggol. The line was planned to be 50 km long and open in 2030.[7][8] Studies on the Cross Island Line began in May 2013.[9]

Line alignment

File:Cross Island Line final and alternate routes across Central Catchment.png
Final and alternate routes crossing the Central Catchment[10]

Since its announcement, there has been controversy over the alignment of the line's Bukit Timah stretch crossing the Central Catchment Nature Reserve (CCNR) and MacRitchie Reservoir, which prompted the Nature Society Singapore to call for the line's realignment. Environmental groups urged the Government not to build the MRT line under the CCNR.[11]

On 19 July 2013, the NSS put forward two proposed alternative alignments:[12] a northern route that would run close to the Thomson–East Coast Line, heading west towards Mandai, Sungei Kadut and Gali Batu before terminating at Choa Chu Kang, and a southern route skirting the reserve along Lornie Road. One engineering professor Lee Der-Horng noted the possible feasibility of constructing the line through the reserve without impacting the environment, though he said the decision "shouldn't be just based on transport".[13]

A tender to assess the environmental impact of the line was called for on 24 February 2014 to facilitate civil works for the line.[14] In July 2014 the LTA appointed Environmental Resources Management (S) Pte Ltd (ERM) to conduct the Environmental Impact Assessment (EIA) for the section of the line around and through the nature reserve. The EIA was to be conducted in two phases with the first studying the ecosystem and physical conditions along both the straight and skirting alignments as well as assessing how construction and operation of the line would affect the CCNR.[15] The Phase 1 EIA report was released in February 2016.[16][17]

Soil investigation works along the CCNR began in February 2017 and by October, was announced to be nearing completion by the end of the year.[11] On 20 March 2018, the LTA declared that the findings on the environmental impact of drilling and other initial works would be completed later that year.[18] The Phase 2 EIA report was released in September 2019.[19] On 4 December 2019, the Ministry of Transport confirmed that the direct route underneath the CCNR had been chosen, with mitigating factors such as tunnelling deeper than usual under the CCNR as well as no surface works in the area. The construction cost is also expected to be $2 billion lower than the alternative alignments.[20]

In December 2022, the LTA awarded the contract for the design and construction of bored tunnels between Fairways Drive and Sin Ming Walk to a joint venture between Obayashi Corporation and Shanghai Tunnel Engineering Co (Singapore) Pte Ltd for $758 million.[21][22]

Phase 1

File:CR8 Hougang MRT construction 20210930 182522.jpg
Construction works at Hougang CRL site

On 25 January 2019, then Transport Minister Khaw Boon Wan announced the alignment of CRL Phase 1 (CRL1). This segment of the line, spanning 29 kilometres (18 miles), consists of 12 stations from Aviation Park station to Bright Hill station. A new 57-hectare Changi East Depot was to be built to serve the line. Construction of CRL1 officially began on 18 January 2023.[23][24] Originally expected to be completed in 2029,[25][26][27] the opening date was pushed back a year as a result of restrictions imposed on construction works due to the COVID-19 pandemic.[28]

Punggol Extension

The Punggol Extension was initially conceived as part of the North Shore Line,[29] which was first announced by National Development Minister Lim Hng Kiang in December 1996.[30] The LRT line would connect between Pasir Ris and Woodlands[30] or Sembawang.[31][32] A station box for the future line was constructed beneath the Punggol NEL station.[33] During a national conference organised by the Feedback Unit in April 2005, the transport ministry confirmed that plans for the MRT line were still under study, in response to suggestions for a line between Pasir Ris and Punggol. Nevertheless, the line would only be built in tandem with development plans along the line.[34]

On 10 March 2020, the LTA announced details of the 7.3-kilometre (4.5-mile) CRL - Punggol Extension (CPE). The branch will consist of four stations from Pasir Ris station to Punggol station. Similarly to CRL1, the opening of CPE was delayed from its original 2031[35][36] opening date to 2032.[28] As of January 2022, there were no plans to extend the Punggol branch to Jalan Kayu.[37] Member of Parliament Gan Thiam Poh also proposed to serve residents of Fernvale and Yio Chu Kang by extending the CRL Punggol branch to Yio Chu Kang station; transport minister Chee Hong Tat rejected the proposal.[38]

Extension to Changi Airport Terminal 5

Script error: No such module "Labelled list hatnote". The LTA was also studying a possible extension to Changi Airport Terminal 5.[39] This was later confirmed by LTA in January 2019, during the announcement of Phase 1 of the CRL, with the station code "CR1" possibly reserved for a station in Terminal 5.[40] Later that year on 25 May, LTA published the Land Transport Masterplan 2040, which confirmed the extension of both the CRL and Thomson-East Coast Line (TEL) to the Terminal 5, with plans for the TEL to further extend to the existing Changi Airport MRT station on the East–West Line and absorb the Changi Airport branch of that line, which includes Expo and Tanah Merah stations.[41][42][43]

On 14 May 2025, during the groundbreaking of Terminal 5,[44] the airport operator Changi Airport Group gave further confirmation of plans to extend the TEL and CRL to the terminal, and the first render of the station design was unveiled.[45][46][47] Later on 25 July, the LTA officially announced Changi Terminal 5 station as an interchange station with the TEL, [48] unveiling the location of Changi Terminal 5 station and the alignments of the extension of both lines.[49][50] The Changi Terminal 5 station will be located in the terminal's ground transportation centre, which will border the Changi East Urban District.[46][51]

Phase 2

In December 2021, as part of a virtual exhibition by the LTA, a future system map depicted a series of 11 unnamed stations on the western half of the CRL.[52] The map also showed the western segment interchanging with existing and under-construction stations: King Albert Park, Clementi, Jurong Pier and Gul Circle stations. The map, along with the virtual exhibition, has since been offline. The LTA explained that the route was a "conceptual alignment" yet to be finalised, with the interchange stations being tentative.[53]

On 20 September 2022, then Transport Minister S. Iswaran confirmed the stations for Phase 2 of the CRL. Expected to open in 2032, the 15-kilometre (9.3 mi) segment spans six stations from Turf City station to Jurong Lake District station.[54][55] Construction of these stations was expected to start in 2023.[54] On 7 July 2025, a groundbreaking ceremony was held at Clementi station, marking the official beginning of the construction of Phase 2.[56]

Phase 3

The CRL is to be completed in three phases.[57] It is projected that the second and third phases will be about 14 kilometres (8.7 miles) and 13 kilometres (8.1 miles) long respectively.[58] In 2021, LTA published a map of the MRT system in the 2030s as part of a virtual exhibition. The map indicated four stations on Phase 3, with an interchange at Jurong Pier station and Gul Circle station on the Jurong Region Line and East–West Line, respectively.[59]

In February 2022, The Straits Times projected that civil works for Phase 3 might be completed by the end of 2033, with operations beginning in 2034 or later.[60] However, LTA stated that the exact timeline is unclear and will only be known with the completion of advanced engineering studies, which was still ongoing by July 2025.[56] The studies had concluded by March 2026. Construction of Phase 3 is slated to begin in 2027, with completion set in the late 2030s.[61]

Future plans

In conceptual plans for the redevelopment of Paya Lebar Air Base, an additional station has been proposed between Defu and Tampines North stations to serve the new developments.[62]

Network and operations

Route

File:MRT Route Map CR.svg
Planned route of the Cross Island Line[63][64]

The 58 kilometres (36 mi)-long CRL is planned to run in a generally east–west direction, serving 27 stations[57] and being an alternative route to the existing East–West Line (EWL) and Downtown Line (DTL).[7][65] Phase 1 of the line goes west from Changi, in the east, to Pasir Ris. The line branches off to Punggol Digital District[35] and goes south-west towards Tampines North, and west to Hougang, and further towards Sin Ming via Ang Mo Kio.[63] Phase 2 of the line connects Bukit Timah to Sin Ming, tunneling through the CCNR, before continuing south-west to West Coast via Clementi, before heading north-west to Jurong Lake District.[64] Phase 3 concludes the line at the Jurong Industrial Estate.[64]

Services

At least half of the CRL stations are to interchange with existing lines, providing alternative routes for commuters.[3]

The possibility of implementing an express service for the CRL was also studied.[66] However, then Transport Minister Khaw announced in 2018 that express services were considered not feasible, citing the higher cost needed to build extra tracks, tunnels and additional signalling systems that can affect non-express commuters and existing lines.[67][68]

Stations

Names stated are working names, except for the existing interchange stations.[25]

Cross Island Line stations timeline
Date Project Description
2030 Phase 1 (CRL1) Aviation ParkBright Hill
2032 Punggol Extension (CPE) Pasir RisPunggol
Phase 2 (CRL2) Turf CityJurong Lake District
Mid-2030s Extension to Changi Airport Terminal 5 Aviation ParkChangi Terminal 5
Late-2030s Phase 3 (CRL3) Template:TBA

Legend

File:Aiga escalator up.svg
Elevated
File:MRT Singapore Destination 1.svg File:MRT Singapore Destination 14.svg
Line terminus
File:Barrier turnstile icon.svg
Transfer outside paid area
File:Aiga escalator.svg
Ground-level
File:MUTCD D9-6.svg
Wheelchair accessible
File:Bus-logo.svg
Bus interchange
File:Aiga escalator down.svg
Underground
File:ISO 7010 W003.svg
Civil Defence Shelter
File:Aiga carrental cropped.svg File:BSicon Mono-CHN.svg File:BSicon AETRAM.svg File:Aiga watertransportation.svg File:20 airtransportation.svg File:Aiga immigration.svg
Other transportation modes

List

scope="col" style="color: black; background:#Template:Rcr" | Station code scope="col" style="color: black; background:#Template:Rcr" | Station name scope="col" style="color: black; background:#Template:Rcr" | Image scope="col" style="color: black; background:#Template:Rcr" | Interchange;
Adjacent transportation
scope="col" style="color: black; background:#Template:Rcr" | Opening scope="col" style="color: black; background:#Template:Rcr" | Cost
Changi Terminal 5 extension (under planning, to be ready by mid-2030s)
CR1TE32 Changi Terminal 5 Template:CNone  Thomson–East Coast Line 
File:20 airtransportation.svgChangi Airport Terminal 5File:Aiga immigration.svg
Mid-2030s;
9 years' time
Template:TBA
Phase 1 (under construction, to be ready by 2030)
CR2 Aviation Park File:Aviation Park MRT station site 270622.jpg File:Aiga watertransportation.svgChangi Ferry TerminalFile:Aiga immigration.svg
2030;
4 years' time
S$320 million[69][70]
S$356 million[71][a]
CR3 Loyang File:CR3 Loyang MRT construction 20241124 131322.jpg
S$748 million[72][73]
CR4 Pasir Ris East File:CR4 Pasir Ris East MRT construction 20251026 112938.jpg S$363 million[74]
CR5CP1EW1 Pasir Ris File:(SGP-Singapore) Pasir Ris MRT Station Cross Island Line Construction 2025-04-08.jpg  Cross Island Line (Punggol Extension)  (2032)
 East–West Line 

File:Bus-logo.svgPasir Ris
S$980 million[75]
CR6 Tampines North File:Tampines North MRT station site 270622.jpg File:Bus-logo.svgTampines North S$397 million[76]
S$446 million[69][77][b]
CR7 Defu File:CR7 Defu MRT construction 20240922 153626.jpg
S$467 million[78]
CR8NE14 Hougang File:Hougang MRT station site 010523.jpg  North East Line 

File:Bus-logo.svgHougang Central
S$604 million[79]
CR9 Serangoon North File:CR9 Serangoon North MRT construction 20250914 135206.jpg S$454 million[80][81]
CR10 Tavistock File:CR10 Tavistock MRT construction station site20250914 140136.jpg S$407 million[80][81]
CR11NS16 Ang Mo Kio File:NS16 Ang Mo Kio MRT Station Exterior 202412.jpg  North–South Line 

File:Bus-logo.svgAng Mo Kio
S$644 million[82]
CR12 Teck Ghee File:Teck Ghee MRT station site 270622.jpg S$615.9 million[83]
CR13TE7 Bright Hill File:TE7 CR13 Bright Hill MRT soil investigation DJI 0060.jpg  Thomson–East Coast Line  S$526 million[84]
S$758 million[85][c]
Phase 2 (under construction, to be ready by 2032)
CR14 Turf City File:Turf City MRT station site 081022.jpg
2032;
6 years' time
S$530 million[86]
CR15DT6 King Albert Park Template:CNone  Downtown Line  S$447 million[87]
CR16 Maju rowspan="2" Template:CNone S$480 million[88]
S$199 million[89][d]
CR17EW23 Clementi Template:CNone  East–West Line 

File:Bus-logo.svgClementi
S$514 million[87]
CR18JE West Coast File:CR18 West Coast MRT station under construction 20251220 101734.jpg  Jurong Region Line (East)  (late-2030s) S$510 million[90]
S$242 million[91][e]
CR19 Jurong Lake District File:Jurong Lake District MRT station site 081022.jpg S$590 million[92]
Phase 3 (under planning, to be ready by late-2030s)[59]
CR20 Template:TBA Template:CNone
Late-2030s;
13 years' time
rowspan="5" Template:TBA
CR21JS12 Jurong Pier Template:CNone  Jurong Region Line 
CR22 Template:TBA Template:CNone
CR23 Template:TBA Template:CNone
CR24EW30 Gul Circle Template:CNone  East–West Line 
Punggol Extension (under construction, to be ready by 2032)
CP1CR5EW1 Pasir Ris File:CR5 CP1 Pasir Ris MRT construction 20240428 083251.jpg  Cross Island Line 
 East–West Line 

File:Bus-logo.svgPasir Ris
2032;
6 years' time
S$980 million[75]
CP2 Elias File:CP2 Elias MRT construction site 20240901 164502.jpg $562 million[93]
CP3PE4 Riviera File:CP3 Riviera MRT construction site 20241215 140558.jpg  Punggol LRT (East Loop) File:Barrier turnstile icon.svg S$1.1 billion[94]
CP4NE17PTC Punggol File:CP4 Punggol MRT construction site 20240517 100857.jpg  North East Line 
 Punggol LRT 

File:Bus-logo.svgPunggol
S$496 million[85]

Depots

scope="col" style="color: black; background:#Template:Rcr" | Depot name;
Lines
scope="col" style="color: black; background:#Template:Rcr" | Location scope="col" style="color: black; background:#Template:Rcr" | Image scope="col" style="color: black; background:#Template:Rcr" | Line-specific
stabling capacity
scope="col" style="color: black; background:#Template:Rcr" | Cost scope="col" style="color: black; background:#Template:Rcr" | Opening
 Changi East  Changi Template:CNone 70 trains S$1.05 billion[95][96][97]
2030;
4 years' time

Train control

The Cross Island Line will be equipped with Siemens Trainguard Communications-based train control (CBTC) moving block signalling system with Automatic train control (ATC) under Automatic train operation (ATO) GoA 4 (UTO).[98]

Rolling stock

File:(SGP-Singapore) CRRC Qingdao Sifang CR151 Mockup @ Singapore Mobility Gallery Exterior 2024-06-03 (1).jpg
The CR151 mockup displayed at LTA's Hampshire office.

Services on the CRL are to be provided by an initial order of six-car electric multiple units (EMU) designed and manufactured by CRRC Qingdao Sifang in Qingdao, China, known as the CRRC Qingdao Sifang CR151. These trains will draw power from an overhead conductor rail for increased acceleration, the second line on the MRT network after the North East Line (NEL), and will be equipped with condition monitoring systems to enable rapid detection of potential faults.[99]

In addition, each carriage will feature five doors per side, similar to the T251 trains on the Thomson–East Coast Line (TEL), and will include wider gangway connections between carriages to facilitate smoother passenger movement both within the train and during boarding and alighting. Platforms on the CRL will be constructed to accommodate eight-car trains, the longest on the MRT network, which are expected to be fully utilised in the early years of operation as commuter demand increases.[100]

The LTA announced that it had awarded the Template:SGD contract for the supply of trains for the line on 14 June 2023. Initially comprising a 44-train order, it includes an option for 11 more trains and for maintenance support of the train fleet. The trains were scheduled to be delivered progressively from 2027 onwards.[101] A CRL Train Mixed Reality Mock-up was displayed at LTA's Hampshire office as a public engagement exercise.[102][103][104]

The first train, set 5001, arrived at Jurong Port from Qingdao on May 31, 2026.[105]

Notes and references

Notes

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  1. ^ Tunnel between Aviation Park and Loyang
  2. ^ Tunnel between Tampines North and Defu
  3. ^ Tunnel between Bright Hill and Turf City
  4. ^ Tunnel between Maju and Clementi
  5. ^ Tunnel between West Coast and Jurong Lake District

References

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