The Eastern Primary was a planned major road serving the new town of Irvine. It would have a formed a D shaped ring around the eastern edge of the town. None of the road was built. Some smaller roads were built on part of its line. These are Towerlands Road between the B7081 and Corsehill Mount Roundabout where the oversize roundabout is an indication that something bigger was planned here. The other is Moss Drive between Newhouse Interchange and Oldhall Roundabout, again the large roundabout was designed for grade separation that never happened.