It continues on the north side of the interchange as Barnsford Road which runs around the western perimeter of the airport, then passes some fields and crosses the Black Cart Water and the isolated Inchinnan Business Park, meeting the A8 (Greenock Road) at Red Smiddy Roundabout.
Barnsford Road proceeds on the north side of the interchange as it encircles the western boundary of the airport. It then traverses through some fields and crosses the Black Cart Water and the isolated Inchinnan Business Park, meeting the A8 (Greenock Road) at Red Smiddy Roundabout.