frontage road

US /ˈfrʌn.tɪdʒ ˌroʊd/
UK /ˈfrʌn.tɪdʒ ˌroʊd/
"frontage road" picture
1.

a road that runs parallel to a main road and provides access to properties alongside it

:
Take the next exit and then turn onto the frontage road.
Many businesses are located along the frontage road.