3-Door Alexander Dennis Enviro500 buses launched on Service 4 & 69

The Alexander Dennis Enviro500 3-Door bus has been launched on SBS Transit Bus Services 4 & 69 on 10 January 2022 and 17 January 2022 respectively.

The bus was also deployed on Bus Service 8 during the evening peak hours on 17 January 2022.

50 units of the Alexander Dennis Enviro500 (3 Door) double-deck bus, configured with three doors and two staircases for smoother boarding and alighting, has been procured by the Land Transport Authority in April 2019, alongside 50 3-door MAN A95 (Euro 6) buses.

These buses are the first to feature a double glass-staircase design on both front and rear staircases, as visible on the right side of the bus.

Complementing the futuristic looks of the bus is a fully low-floor design on the lower-deck, making entering and exiting the bus very accessible.

These buses are the product of engineering efforts by Alexander Dennis Limited after the initial conception in 2016. The engine and drivetrain components had to be relocated to the right rear of the chassis in order for a full-low-floor design.

Registration of these buses began in September 2021, and these buses are currently with SBS Transit & SMRT Buses.

  • From 26 Oct 2021 – Bus Services 190 & 974 / 974A
  • From 6 Dec 2021 – Bus Service 107
  • From 20 Dec 2021 – Bus Service 23
  • From 27 Dec 2021 – Bus Service 37
  • From 30 Dec 2021 – Bus Services 854, 854e & 857
  • From 10 Jan 2022 – Bus Service 4
  • From 17 Jan 2022 – Bus Service 69

Buses also interline to Service 180 (from Service 190) & 107M (from Service 107).

Adhoc Deployments

The Alexander Dennis Enviro500 3-Door bus was deployed on Tower Transit Bus Service 963 on 11 January 2022.

SBS Transit debut

SBS Transit launched its 3-Door Alexander Dennis Enviro500 buses on 26 October 2021, deployed on Bus Service 974.

Two buses were deployed, SG6344G & SG6347Z.

SG6347Z later was deployed on Service 974A at night, performing the 01:05 trip from Choa Chu Kang Ave 4 (Opp Choa Chu Kang Stn).

SMRT Buses debut & Breakdown

One unit (SG6349T) was deployed by SMRT Buses on Bus Service 190, with its first trip at about 1554hrs from Choa Chu Kang Int.

However, the bus broke down along Choa Chu Kang Drive towards Kampong Bahru Bus Terminal at about 1918hrs due to a fault with the middle door. The bus has since returned to service.

Tower Transit

Tower Transit was allocated several Alexander Dennis Enviro500 3-Door buses from December 2021 in which they were first deployed on Bus Services 854 & 854e during the morning peak hours and Service 857 during the evening peak hours on 30 December 2021.


See also

44 thoughts on “3-Door Alexander Dennis Enviro500 buses launched on Service 4 & 69

  • 18 January 2022 at 12:17 AM

    LTA, please don’t miss the forest for the tree. 3 door bus, double decker or otherwise, is not the main issue. Please focus on green bus apart from the miserable small purchase of pure electric bus many years back.
    3 door feature is also available on green bus, if 3 door feature is the recent craze.

  • 15 January 2022 at 8:39 PM

    EXACTLY! Only single decker buses are allowed in Changi Airport basement. DD buses will scrape the roof


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