100 Three-door Double-Decker Buses Procured by LTA

On 25 April 2019, LTA awarded a contract for the Procurement of 3-Door Euro 6 Double Deck Diesel Buses (Contract Ref. PT342) to 2 different tenderers. Each tenderer will deliver 50 buses each.

S/N Buses Tenderer Sum Awarded
1 50 Three-Door Double Decker Buses Alexander Dennis (Singapore) Services Pte Ltd SGD ~34 million 1/
SGD 33,381,000.00 2
2 50 Three-Door Double Decker Buses ST Engineering Land Systems Ltd SGD ~30 million 1/
SGD 28,494,500.00 2


  • 1 – As per LTA Press Release
  • 2 – Price Listed in GeBIZ, Singapore Government’s one-stop e-procurement portal

The 100 Three-Door Euro 6 Double Decker Buses enter revenue service from 2020. Details regarding the depot and bus service allocation for the buses will be announced closer to the implementation date.


Tender PT342 for Procurement of 3-Door Euro 6 Double Deck Diesel Buses was put up by the Land Transport Authority (LTA) on 15 May 2018. As part of the tender, 100 buses will be procured.


Similar to the previous tender of Euro 6 Double Deck buses released in December 2017, these new buses are Euro 6 (or Euro VI)-compliant, representing the latest in emission standards which came into effect since 1 January 2018 for all new diesel vehicles registered in Singapore.

Similar to the ADL Enviro500 Mock-Up Bus exhibited in 2016, the 3-door double-deck bus will have one entrance and two exit doors. The rearmost exit door will be behind the rear axle. In addition, the bus will have two staircases and built in a fully-low-floor design. The bus is limited to a maximum length of 12.5 metres. A third artist’s impression of the bus features window panels lining both front and rear staircases, a design used on the Wright Gemini III-bodied Volvo B8L and Kowloon Motor Bus’s latest batch of ADL Enviro500 buses.

New requirements imposed by the LTA for new buses include an enhanced Passenger Information Display System (PIDS) comprising LED text displays, LCD display screens and interior speakers. In addition, an exterior-facing display screen and an external speaker is included. An Advanced Driver Assistance System (ADAS), driver anti-fatigue detection system, high-definition CCTV cameras, and passenger counters at entrance and exit doors of the bus are among the additional specifications required by LTA.

The buses will also be equipped with 2 wheelchair bays. The Diesel-Hybrid buses (Volvo 7900 Hybrid), conventional Euro 6 Double Deck Diesel buses and Electric buses will also feature 2 wheelchair bays.

Design Challenges

Prior to this tender, European bus manufacturers typically made fully-low-floor chassis for the left-hand-drive (LHD) market, such as in Europe where similar 3-door, fully-low-floor buses are operated. Given that the tender called for a right-hand-drive (RHD), full-low-floor diesel bus with a third door at the rear overhang, it would be a challenge for bus manufacturers to modify their existing designs to deliver this (relatively) small batch of buses to LTA in the most economical way.

The second staircase at the rear will likely be of a spiral design to conserve seating space on the upper deck, much like the ADL Enviro500 Mock-Up Bus. It is believed that feedback from the revenue service trial of the MAN Lion’s City DD L Concept Bus (SG5999Z) was unfavourable with regards to the safety of the front-facing rear staircase, which put passengers at risk of falling forwards when the bus had to brake suddenly. A retractable barrier was retrofitted after its debut, which prevents upper deck commuters from accessing the rear staircase when the bus is in motion, and only opens when the bus is at a stop.

Tender Process
Stage 1 Tender

As of tender closing time on 23 July 2018 at 4:00PM, participants of the tender are as follows:

  • Alexander Dennis (Singapore) Services Pte Ltd
  • ST Engineering Land Systems Ltd
  • Volvo East Asia (Pte) Ltd
    (Now Known As: Volvo Construction Equipment Singapore (Pte.) Ltd.)

In this first-stage tender, tenderers submit a base offer for 100 Buses.

Stage 2 Tender

After the Stage 1 Tender was closed on 23 July 2018, tenderers who submitted bids were invited again to submit their quotations for 100 & 50 Three-Door Buses separately.

The Stage 2 Tender closing time was extended once to 6 September 2018, 4:00pm.

Submitted Price Proposals for Stage 2 Tender are as follows:

No. Tenderer Price
Base Offer 1 – Provision of One Hundred (100) Units of 3-Door Euro 6 Double Deck Diesel Buses
1 Alexander Dennis (Singapore) Services Pte Ltd $62,502,000.00
2 ST Engineering Land Systems Ltd $56,222,000.00
3 Volvo Construction Equipment Singapore (Pte.) Ltd. $51,610,800.00
Base Offer 2 – Provision of Fifty (50) Units of 3-Door Euro 6 Double Deck Diesel Buses
1 Alexander Dennis (Singapore) Services Pte Ltd $33,256,000.00
2 ST Engineering Land Systems Ltd $28,391,000.00
3 Volvo Construction Equipment Singapore (Pte.) Ltd. $26,855,400.00


  • For Base Offer 2, Volvo submitted 6 Alternative Offers, while Alexander Dennis submitted an alternative offer for 200 buses.


On 15 April 2019, the Road Traffic (Motor Vehicles, Construction and Use) (Exemption for 3-door Omnibus) Order 2019 was made, which exempts the 3-Door Omnibuses procured by LTA to the following rules under the Road Traffic (Motor Vehicles, Construction and Use):

  • 6(1) – The overall length of a motor vehicle, other than an articulated vehicle, shall not exceed 12 metres.
  • 44(1) – Subject to paragraphs (2) and (3), the overhang of a motor vehicle shall not exceed 60% of the distance between the plane perpendicular to the longitudinal axis of the vehicle which passes through the centre or centres of the front wheel or wheels and the foremost vertical plane from which the overhang is to be measured as defined in rule 2.
  • 60(1) – Every vehicle shall be so constructed as to be capable of turning in either direction in a circle which does not exceed in diameter 19 metres.
  • 77(1)(d) – Every entrance and exit of a vehicle registered — on or after 15th February 2006 as an omnibus shall be at least 1,200 millimetres and shall be fitted with a centre stanchion bar in such manner as the Registrar may specify.

Previous Three-door Bus Trials

Previous three-door bus trials included the MAN Lion’s City DD L Concept Bus with Tower Transit (on Bus Service 143), the MAN Lion’s City SD 3-Door trial with SMRT Buses (on Bus Service 190 & 901), as well as the Alexander Dennis Enviro500 Concept Bus Mock Up featured during the Our Bus Journey Bus Carnival in 2016.

Currently, the MAN Lion’s City DD L Bus is operated by SBS Transit on Bus Service 7.

MAN Lion’s City DD L Concept Bus:

MAN Lion’s City SD 3-Door Bus:

Alexander Dennis Enviro500 Concept Bus Mock Up:

🇸🇬 Singapore’s Land Transport Authority (LTA) has awarded Alexander Dennis an order for 50 new Enviro500 double deck…

Posted by Alexander Dennis Limited on Friday, 26 April 2019

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15 thoughts on “100 Three-door Double-Decker Buses Procured by LTA

  • 27 April 2019 at 1:16 PM

    Hope Lta allocate them to all the bus companies

    • 30 April 2019 at 2:13 AM

      SBS Transit:35
      SMRT Corporation:35
      Go-Ahead Singapore:15
      Tower Transit Singapore:15

      Come 2021 i hope Tower Transit being replaced by RATP and Go-Ahead by First Group or any other bi-modal European transport companies

  • 27 April 2019 at 2:25 AM

    Anyone notice ADL using centre tag axles?
    Seriously i hope they would consider buy 70 Bendies for short feeders and Airport service.

  • 26 April 2019 at 4:12 AM

    12.5m?Look awkward surely with three doors..Why not 13m?And Please buy at least 50 Euro6 bendies..Not all feeders suitable for DDs..Airport svc?Forever use tons of SDs??

  • 25 April 2019 at 11:27 PM

    In fact. Bendy Buses performed better for this. LtA should purchase a small number of man a24 euro 6 Buses as well.

  • 29 July 2018 at 10:29 PM

    Hi! I think they should not just order single or double decker buses with 3 doors but more articulated with 4 doors. And better…… Double-articulated as to upgrade the seating capacity.


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