From Longman Dictionary of Contemporary Englishservice areaˈservice ˌarea noun [countable] British English TTRa place on a motorway where you can stop for petrol, food, toilets etc
Examples from the Corpus
service area• He kept his eye on a tan Ford turning slowly into the station and coming to a stop near the service area.• The service area of mid-level networks tends to vary from substate, statewide, and multistate coverage.• Future plans include expanding their service area to include South Dakota, Wisconsin and Montana.• They could see something to be gained by increasing the number of farm families in their service area. 