It proceeds southwards for 9 kilometres, through the large suburb of Milnerton, to reach the Koeberg Interchange with the N1 highway (Table Bay Boulevard) in Brooklyn, where it becomes a limited-access motorway.

It proceeds southwards, through Athlone, Rondebosch East and Lansdowne, to reach the M68 (Ottery Road) interchange in Plumstead, where the M5 loses its motorway status but remains a dual-carriageway as Prince George Drive.

It proceeds southwards, through Retreat, to enter Muizenberg on the False Bay Coast, where it terminates at a roundabout junction with the R310 (Baden Powell Drive).

These could in turn support post-tensioned concrete "U" beam spans, cast on the ground and lifted into place by crane.

Each beam rests on its ends, on purpose designed steel plates, which accommodate expansion and contraction and transmit the weight of the span into the "T" pieces atop the oval pillars.

Each "U" beam, weighing 80 metric tonnes, would be cast on the ground at a nearby designated temporary factory area between the N1 and the railway reserve.

The beams would be transported on the ground by a purpose-built pair of 12 wheeled trucks, made of welded steel "I-beam" frames, each attached to the end of a concrete span "U" beam and then towed a short distance to the construction site by a conventional diesel mechanical horse.

The pre-cast crash barriers lining the edge of the deck would also be manufactured nearby using purpose made steel moulds.

They would be bonded into place by having re-bar-steel loops protruding from both the edge of the road deck and also from the bottom of the barrier section.

Pre-cast lip and groove formations on the upper edges of the "U" beams were designed to accommodate a thick Masonite type of shuttering board which would bear the weight of a man walking on them.

When the steel reinforcing rod framework has been completed over the shuttering, a ready-mix concrete is pumped up from a mixer parked on the underlying roadways.

Finally the deck is covered with a conventional asphalt macadamised tar and granite chip surface and marked with paint.