Auxiliary routes of Arkansas Highway 18


Three auxiliary routes of Arkansas Highway 18 exist in northeast Arkansas.

Newport spur

Arkansas Highway 18 Spur is a spur route that runs to Newport Municipal Airport. The route is in length, and two-lane, undivided.
;Major intersections

Jonesboro spur

Arkansas Highway 18 Spur is a spur route in Jonesboro known as Commerce Drive. The route is in length, connecting Highway 18 to Future I-555/US 63. Commerce Drive is two-lane undivided.
;Major intersections

Manila business route

Arkansas Highway 18 Business is a business route through downtown Manila. The route is in length, and is also known as Baltimore Avenue. In downtown Manila, the route passes the Jonesboro, Lake City & Eastern Railroad Depot and the Herman Davis Memorial, both listed on the National Register of Historic Places.
;Major intersections