Maybe in Singapore they should buy double-deck school bus. For example Dennis Trident 2/Alexander ALX400, Volvo B9TL/Wright Eclipse Gemini 2, Volvo B7TL/Wright Eclipse Gemini and Dennis Trident 2/Plaxton President, including MAN ND243F/East Lancs Kinetec, Volvo B9TL/Optare Olympus and Alexander Dennis Enviro400 and 400H.
School bus will be used as secondary school buses.