Answer:
Although it sounds like I work on a transportation device I actually work in a restaurant.
I sit in a corner while travelling around the world.
What has roots that nobody sees and is taller than trees. Up up up it goes and yet never grows?
An action done on mosquito bites
I run around the streets all day. Under the bed or by the door I sit at night, never alone. My tongue hangs out, waiting to be fed during the day. What am I?
I flow from the Homerβs mouth when he sees doughnuts.