In driving on an interstate the other day, I saw a sign that read, "Rumble Bumps Center Lane." And I looked at the center lane, and, sure enough, the road had been graded in such as way as to leave those bumpy impressions that would wake you up before you crossed the center lane to the other side.

My question is: Is "rumble bumps" a term generally used at least in the United States?

And, if so, what are some other terms that are used elsewhere?

Rumble bumps are a great idea and they certainly are effective!