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Sengkang LRT line

Coordinates: 1°23′40″N 103°54′01″E / 1.394564°N 103.900156°E / 1.394564; 103.900156
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This article is about the LRT line. For the MRT/LRT station on the line, see Sengkang MRT/LRT station.

Sengkang LRT
Logo of Sengkang LRT line
A C810 on the Sengkang LRT Line
Overview
Native nameLaluan LRT Sengkang
盛港轻轨线
செங்காங் லைட் ரெயில் வரி
StatusOperational
OwnerLand Transport Authority
LocaleSingapore
TerminiSengkang
Stations14
Service
TypeAutomated guideway transit/People mover
SystemLight Rail Transit (Singapore)
Services4
Operator(s)SBS Transit Ltd (ComfortDelGro Corporation)
Depot(s)Sengkang
Rolling stockMitsubishi Crystal Mover (C810)
Mitsubishi Crystal Mover (C810A)
Mitsubishi Crystal Mover (C810D) (Future)
Daily ridership27,541 (July 2020)[1]
History
Opened
  • 18 January 2003; 22 years ago (2003-01-18) (East Loop)
  • 29 January 2005; 19 years ago (2005-01-29) (West Loop)
Technical
Line length10.7 km (6.6 mi)
CharacterFully elevated
Track gauge1,850 mm (6 ft 27⁄32 in)
Guideway span: 3.2 m (10 ft 6 in)
Electrification750 V DC Third rail
SignallingKyosan APM fixed block ATC under ATO GoA 4 (UTO), with subsystems of ATP, ATS and CBI[2]
Route map

Legend
West loop
 SW5  Fernvale
 SW6 
 Layar
Thanggam
 SW4 
 Kupang
 SW3 
Sengkang Depot
Sungei Punggol
 SW7 
 Tongkang
Farmway
 SW2 
 SW8 
 Renjong
Cheng Lim
 SW1 
Sengkang East Road
 STC 
 NE16 
 Sengkang
non-revenue track
to Punggol LRT
North East Line
to HarbourFront
■
■
North East Line
to Punggol Coast
 SE5 
 Ranggung
Compassvale
 SE1 
Punggol Road
 SE4 
 Kangkar
Rumbia
 SE2 
Bakau  SE3 
East loop
This diagram:

The Sengkang LRT is a 10.7-kilometre (6.6 mi) automated guideway transit line in Singapore. The line, which initially opened on 18 January 2003, connects the residential districts and suburbs of Sengkang to Sengkang Town Centre, where it connects with the North East MRT line, Sengkang Bus Interchange, Compass One and Compassvale Bus Interchange. It is the second line of the LRT system in Singapore and like all other LRT lines, it is fully elevated and uses automated trains. It is the first LRT line to be operated by SBS Transit.

History

[edit]

Planning for the Sengkang LRT line was underway when the Bukit Panjang LRT was opened by then-Prime Minister Goh Chok Tong on 6 November 1999.[3] Construction began in January 2000 for both the East Loop and West Loop. Meanwhile, the Sengkang LRT line was awarded to Singapore Bus Service (present-day SBS Transit) on 20 May 1999.[4][5]

On 18 January 2003, the East Loop was opened, the first section of the line to do so.[6] The West Loop, with the exception of Farmway, Cheng Lim and Kupang stations, commenced operations on 29 January 2005.[7][8] These three stations then opened on 15 November 2007,[9] 1 January 2013[10] and 27 June 2015, respectively.[11]

Improvements

[edit]
Sengkang LRT line stations timeline
Date Project Description
18 January 2003 East Loop East Loop completely opened in both directions throughout the day.
29 January 2005 West Loop West Loop (except for Cheng Lim, Farmway and Kupang) opened in uni-directional manner.[7][8]
15 November 2007 Farmway opened for passenger service.[9]
4 January 2010 West Loop operated in both directions during the morning and evening peak hours on weekdays.[12]
1 January 2013 West Loop operated in both directions throughout the day and Cheng Lim was opened for passenger service.[10]
27 June 2015 Kupang opened for passenger service.[11][13]

On 31 October 2012, the Land Transport Authority announced that starting from the first quarter of 2016, both the Sengkang and Punggol LRT systems would be upgraded to two-car trains, doubling the passenger capacity. An additional 16 cars were to be ordered, bringing the total fleet size to 57. The induction of longer trains also required modifications to the signalling and communication system.[14]

On 22 December 2015, the line began operating two-car trains, five years after plans to raise the capacity of the increasingly packed light-rail system were announced.[15]

Around the end of 2016, two-car trains started being deployed on both directions of the West Loop during the weekday peak hours, due to the increasing number of commuters living in new HDB flats located near Thanggam, Kupang and Farmway stations. Before this, two-car trains were only deployed towards the direction of Cheng Lim during morning peak hours, and towards the direction of Renjong during evening peak hours.[citation needed]

On 15 December 2017, the Land Transport Authority said there will be limited services on parts of the Sengkang-Punggol LRT (SPLRT) on most Sundays from 14 January 2018 to 25 February that year, to facilitate renewal and improvement works (except 18 February as it is a Chinese New Year holiday). Only one platform will open for service at 5.30am on Sundays. The other platform will open from 7am.[16][17][18] On 22nd of that month, SBS Transit said the arrangement is expected to continue until end April that year.[19][20]

From 27 May to 7 October that year, limited services on Sundays will continue on the Sengkang-Punggol LRT (SPLRT). One platform will open at 5.30am and the other platform will open at 5.30pm.[21][22]

On 5 February 2021, the Land Transport Authority announced that it has purchased 17 two-car trains for the Sengkang and Punggol LRT systems. The new trains will be delivered progressively from 2024 to 2027. In addition to new trains, the Sengkang Depot will also be expanded to 11.1 ha (27.4 acres) from the existing 3.5 ha (8.6 acres) to ensure there is capacity and maintenance space for the new trains. The expansion of the depot will also see two new reception tracks being built to shorten the train launching time. To ensure there is enough electricity to support the larger fleet of trains, 3 new power stations will be built, increasing the total number of power stations supporting the system to 8 once completed.[23]

Network and operations

[edit]

Route and service

[edit]

The Sengkang LRT (SKLRT) has a route length of 10.7 kilometres (6.6 miles) and is fully elevated.[24][25] It is coloured grey on official maps.[26] The SKLRT has four routes operating on two bi-directional loops that converge at Sengkang station.[25][27][28] The line generally runs along road medians,[29] with an average viaduct height of 15 metres (49 ft).[30]

On the east loop, the line heads north from Sengkang station before curving eastward and running along the medians of Compassvale Street and Rivervale Drive. After passing Rumbia station, it turns south along Rivervale Drive, then west along Sengkang East Avenue, completing the loop by heading north back to Sengkang station.[31] On the west loop, the line from Sengkang station diverge west toward Cheng Lim station. A spur connects the SKLRT to the Punggol LRT line across the Tampines Expressway.[32] The SKLRT runs along Anchorvale Street and Fernvale Street. Between the Farmway and Kupang stations, the line crosses Sungei Punggol. After Kupang station, the line turns south along Fernvale Road, and turns east along Sengkang West Avenue.[31] It crosses Sungei Punggol again between Layar and Tongkang stations, with reception tracks connecting the line to Sengkang Depot.[32][33] Following Renjong station, the line completes the loop by heading north back to Sengkang station.[31]

The SKLRT is operated by SBS Transit.[34] Since 2018, the SKLRT has been part of the New Rail Financing Framework (NRFF). Previously, the operator (the owner of the rail assets) had to bear the cost of maintaining and upgrading trains and signalling. Under the NRFF, the LTA and SBS Transit will share the profits and financial risks in operating the line and the LTA will take control of its operating assets on 1 April 2033. SBS Transit will operate the line under a 15-year licence which will expire on 31 March 2033.[35][36]

Stations

[edit]

The east loop has five stations, while the west loop has eight stations.[26] The average distance between stations are 300 metres (980 ft), with each station positioned to serve residents within a 400-metre (1,300 ft) radius.[29]

Station code Station name Images Opening Further information Location(s)
 STC  NE16  Sengkang 18 January 2003;
22 years ago 		Interchange with the  North East Line  .
Close to the  Sengkang Bus Interchange.		 1°23′30″N 103°53′42″E / 1.391653°N 103.895133°E / 1.391653; 103.895133
East Loop
 SE1  Compassvale 18 January 2003;
22 years ago 		— 1°23′40″N 103°54′01″E / 1.394564°N 103.900156°E / 1.394564; 103.900156
 SE2  Rumbia Named after the Rumbia plants: Sagu Rumbia and Buah Rumbia.[37] 1°23′27.94″N 103°54′22.70″E / 1.3910944°N 103.9063056°E / 1.3910944; 103.9063056
 SE3  Bakau An entrance to the station along the road. A flight of stairs leads to the concourse level Named after the Bakau wood used for building foundations.[38] 1°23′16.27″N 103°54′18.96″E / 1.3878528°N 103.9052667°E / 1.3878528; 103.9052667
 SE4  Kangkar "Kangkar" refers to a former fishery in the area.[39] 1°23′1.46″N 103°54′7.90″E / 1.3837389°N 103.9021944°E / 1.3837389; 103.9021944
 SE5  Ranggung "Ranggung" refers to a species of stork residing on the Punggol shore.[40] 1°23′1.03″N 103°53′51.85″E / 1.3836194°N 103.8977361°E / 1.3836194; 103.8977361
West Loop
 SW1  Cheng Lim 1 January 2013;
12 years ago 		Named after the former Cheng Lim Farmway and Lorong Cheng Lim, where farms formerly existed.[41][42] The roads in turn are named after Goh Cheng Lim, director of Kim Hock Hoe Ltd, a company of ship owners and commission agents.[43] 1°23′47″N 103°53′37″E / 1.3963098°N 103.8937126°E / 1.3963098; 103.8937126
 SW2  Farmway 15 November 2007;
17 years ago 		1°23′56.32″N 103°53′20.08″E / 1.3989778°N 103.8889111°E / 1.3989778; 103.8889111
 SW3  Kupang 27 June 2015;
9 years ago 		Named after the practice of Kupang fishing.[44] 1°23′57.22″N 103°52′52.75″E / 1.3992278°N 103.8813194°E / 1.3992278; 103.8813194
 SW4  Thanggam 29 January 2005;
20 years ago 		The name means "Gold" in Tamil.[45] 1°23′57.68″N 103°52′29.26″E / 1.3993556°N 103.8747944°E / 1.3993556; 103.8747944
 SW5  Fernvale Exterior view of Fernvale station next to Seletar Mall — 1°23′35.55″N 103°52′34.69″E / 1.3932083°N 103.8763028°E / 1.3932083; 103.8763028
 SW6  Layar The island platform of Layar station with ventaliation fans. Platform barriers minimise commuters' access to the tracks. The name means "To sail" in Malay.[46] 1°23′38.49″N 103°52′47.11″E / 1.3940250°N 103.8797528°E / 1.3940250; 103.8797528
 SW7  Tongkang The name refers to a small boat transporting goods along rivers.[47] 1°23′27.88″N 103°53′08.78″E / 1.3910778°N 103.8857722°E / 1.3910778; 103.8857722
 SW8  Renjong The name means "tall" and "to raise" in Malay.[48] 1°23′11.81″N 103°53′25.53″E / 1.3866139°N 103.8904250°E / 1.3866139; 103.8904250

Services

[edit]

There are four services in total, with two on each loop. However, on the Electronic Display, they will not show the service letters.

Service Terminal via Loop Direction
A Sengkang Renjong West Loop Renjong to Cheng Lim
Clockwise direction
B Sengkang Cheng Lim West Loop Cheng Lim to Renjong
Anti-clockwise direction
C Sengkang Compassvale East Loop Compassvale to Ranggung
Clockwise direction
D Sengkang Ranggung East Loop Ranggung to Compassvale
Anti-clockwise direction

Infrastructure

[edit]

Rolling stock

[edit]
A Mitsubishi Crystal Mover C810 train on the Sengkang LRT East Loop.
The LRT trains on the Sengkang–Punggol LRT lines are parked at the top level of Sengkang Depot.

The Sengkang and Punggol LRT lines (SPLRT) utilise the Crystal Mover Automated People Mover (APM) rolling stock manufactured by Mitsubishi Heavy Industries.[49] The rubber-tired trains are fully automatic and can accommodate up to 105 passengers per vehicle.[50][24] The SPLRT has an initial fleet of 41 APMs, with 16 more APMs delivered under contract C810A.[51][52] The APMs are configured for single car or two-car operations,[51] with a maximum capacity of 36 trainsets on the network.[53] In February 2022, the LTA ordered another fleet of 17 two-car APMs from Mitsubishi for S$439 million.[54][55] This was followed by another order for eight more two-car trains in May 2023, costing S$87 million.[56][57] The new trains are set to replace the 25 one-car trains and half of the 16 two-car trains, bringing the overall SPLRT fleet to 33 two-car APMs.[56]

The APMs have a top speed of 80 km/h (50 mph), with a maximum operational speed of 70 km/h (43 mph).[50] They are powered by 750V DC third rail located on one side of the guideway.[58] Each vehicle is 11.84 m (38.8 ft) long and 2.69 m (8.8 ft) wide.[50] The exterior has a crystal-like design with a polyhedral nose reflective of its namesake. Mitsubishi describes the curved sides of the APM as a design choice to "soften" the sharpness of its polyhedral shape. The exterior is painted pearl white and indigo blue.[59]

As driverless vehicles, the APMs do not include a driver cabin.[59] Instead, detrainment doors at both ends of the cabin allow emergency evacuation of passengers onto the track.[60] The emergency stop button and emergency notice system are located at the right-side corner of the vehicle's front, while line maps and service information are displayed on the left. The interior features white side panels and ceiling, a grey floor, grayish-blue seats, and handrails and grip bars accented in a wine color.[59] The cabins are air-conditioned.[61]

The SPLRT trains are maintained and stabled on the second floor of Sengkang Depot.[58] Located between the Layar and Tongkang LRT stations,[33] the depot also houses the trains of the North East line.[54] Its facilitates include a two-story main building with an operation control center room, automatic vehicle washing facility, maintenance garage, departure inspection track, stabling yard, power receiving and transforming facilities, and a test track.[58] The 3.5-hectare (8.6-acre) site is being expanded to 11.1 hectares (27 acres), which will include two more reception tracks and three traction power substations to expand the depot's stabling and maintenance capacity.[54][62]

Train control

[edit]

The Sengkang LRT line is fully automatic,[24] and is equipped with Kyosan APM fixed block signalling system.[63][64] The line's Automatic train control (ATC) is composed of automatic train protection (ATP) which ensure safe operations, automatic train operation (ATO) which controls the automatic operations, and automatic train supervision (ATS) for overall command, monitoring and recording of the system.[50] To reduce equipment mass on the train, the onboard ATP and ATO systems are integrated into one unit, althought for safety reasons, the function and control logic of the AVP and AVO systems remain independent.[65] These subsystems are connected via LAN and managed by a computer-based interlocking (CBI) system that oversees traffic safety of the APM.[66][67]

Station facilities

[edit]
Platform barriers and a fire phone on Renjong LRT platforms

All Sengkang LRT stations are equipped with lifts connecting passengers from the ground level to the station concourse, and from the concourse to the platform level. Each station also has at least one wider faregate for wheelchair users, and tactile flooring to guide the visually-impaired from the ground floor to the platforms.[68][69] The stations are also equipped with fire extinguishers and fire phones. Emergency stop buttons on both sides of the station platform, when activated, cuts off traction power supply and halts incoming trains.[60]

Fixed platform barriers installed by Chee Yam Contractor are intended to prevent commuters falling to the tracks.[70][71] However, the barriers do not have doors and instead have fixed openings for boarding trains.[72] The lack of doors have been criticised by a commuter as a "half-baked solution" and felt the barriers would instead restrict rescue efforts.[71] Nevertheless, the limited space of the LRT platforms could not accommodate the power, communications and signal control rooms required for platform screen doors.[71][72]

To enhance safety, SBS Transit has implemented the VAnGuard track intrusion detection system on the SPLRT.[73] Using video analytics and artificial intelligence, the system monitors footage of tracks and platforms to identify individuals or objects on the tracks.[74] When an intrusion is detected, operations control centre staff can press the emergency stop button to halt services along on a specific loop. The system also triggers an alarm when intruders or foreign objects are detected. In addition to track intrusions, the system can spot unattended items on station platforms, allowing staff to provide assistance or undertake security precautions.[73]

Incidents

[edit]
  • On 20 April 2015, the East Loop suffered a brief service disruption due to a power fault.[75]
  • On 8 May 2015, more than two weeks after the April 2015 disruption, another service disruption occurred on the West Loop, stranding a number of trains for three hours at 5.00 pm.[76]
  • On 16 February 2018, the first day of Chinese New Year, a train broke down near Sengkang station from the West Loop due to a dislodged power collector shoe at 11.09 am. A rescue train managed to haul the faulty train away and services were resumed approximately two hours later.[77]
  • On 9 June 2024, a signalling fault on the Sengkang LRT and Punggol LRT lines caused services to be suspended from the first trains around 5.45 am until 10.12 am.[78]
[edit]
Tongkang LRT station is in the centre, with Sengkang Depot behind it. In the distant background lies the HDB blocks of the Fernvale neighbourhood.
Panoramic view showing the Sengkang LRT line (SKLRT). Renjong LRT station lies to the left, and the Sengkang Depot for North East line and SKLRT to the right. In the distant background lie Buangkok and Hougang.

References

[edit]

Citations

[edit]
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Sources

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