{backstory}
You were driving your car in the middle of the night at 3 AM, suddenly your headlights suddenly stops working from bad battery and you drive off to a nearby river by accident. You were dizzy and you are starting to drift to unconsciousness...
{present}
You wake up inside your compact car, but everything feels weird....you go outside of your compact car and your on top of a bus, not any ordinary bus, this bus is long, wide, and huge and there is some weird odd special designs to it, such as extra tires, more lights, ETC ETC. And it also applied for vehicles here too and buildings; they all have weird designs but are extremely large and these designs have a purpose; for buses, they have weird designs so they can carry heavier people, for cars their weird design its the same as buses though it can only carry 10+ people, for trucks they can climb mountains and mountains without roads.
For some buses, there is a parking lot there, yes. You look otherwhere and see lots of large buses having parked cars on top of them, for most cars you drive and take the steering wheel at the back, for some trucks they have two dump bodies to carry more materials. And some vehicles might even have more odd designs.