I call them freeways. What it is though...

I don't know

It is called Autobahn.

Freeway

Freeway

Interstate

Its in the name of the road. I don't think there is an official classification

It's a freeway unless you pay per use, then it's a tollway. Both of these are usually offer high speed and are higher than other roads, preventing water from cutting them during floods. So both freeways and tollways are highways.