Kann man so eine Matratze im Bus transportieren?

In doubt send a mail to your local public transport provider and ask them.

I *would* think if its one of these big city buses AND you choose a time where it is relatively empty, it would be fine, but its the driver who has the last word and I guess carrying this thing to a bus station just to get turned away there would be a bummer – so asking beforehand is the way to go