On 29 October 2025, the Zhongtong N12D made its revenue service debut on Tower Transit Bus Services 189 and 941.
The Zhongtong N12D is the second 3-door 2-staircase electric double-decker bus to enter revenue service trials, shortly after the CRRC eD12 was launched earlier this month. Several bus manufacturers have manufactured prototype 3-door 2-staircase double-decker buses ahead of the award of the PT602 electric bus tender.
The bus was first unveiled in Singapore on 11 October 2024, and later also exhibited at the LTA-UITP Singapore International Transport Congress & Exhibition (SITCE) in November 2024. The bus was registered on 7 October 2025 to Tower Transit, bearing the registration number SG4014Y. Revenue service began on 29 October 2025.
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Today (24th November 2025) evening, Zhongtong N12D launched on Tower Transit City Direct Bus Service 674 for the first time of!
Today (18th November 2025) evening, Zhongtong N12D launched on Tower Transit City Direct Bus Service 657 for the first time of!