This bus is from French manufacturer Majorette - hence the Parisian route information & advertising on the side. As always, disassembly followed by paint stripping (metal parts only!) and re-painting will provide the colony world with another useful item of scenery. It could even form part of a scenario - rescue the helpless colonists from the evil alien invasion.
I'm thinking that with a couple of magnets concealed in the roof, I could also build a clip-on armoured shell for more post-apocalyptic adventures.