rest area

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A designated area, usually along a major highway, where motorists can take a break from driving.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A place on the interstate where one can stop to use the restroom, rest or do other things.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun designated paved area beside a main road where cars can stop temporarily