This is not a comment about Europe, but rather America: It is quite normal for there to be several fast food restaurants open either all night or at least until 2 am.
I would very much expect to be able to leave the highway at midnight in most parts of the country and get something to eat.
I've taken exactly one road trip in Europe, and it was during the daytime, so I have no idea if this is common there or not. I do note that you specified "regular restaurant" but GP said "gas, food and lodging", all of which are readily available at midnight in the US.
I would very much expect to be able to leave the highway at midnight in most parts of the country and get something to eat.
I've taken exactly one road trip in Europe, and it was during the daytime, so I have no idea if this is common there or not. I do note that you specified "regular restaurant" but GP said "gas, food and lodging", all of which are readily available at midnight in the US.