Aut cum scuto aut in scuto
That, or it's a shack used for ice fishing, cleverly disguised as a school bus.
Or, kids ice fishing in a shack, but also on their way to school. Multitasking.
I don't know if we had one in Portland. Looking it up I only find Lincoln Maine. Which is the middle of the state. Not much happening there these days
I suspect that to be Caribou, Maine
two horsepower SUV