The northern terminus is a roundabout on Ferry Road, a few hundred metres southeast of an intersection with the Christchurch ring route.The motorway immediately crosses the Ōpāwaho / Heathcote River and is carried on an embankment south across its swampy floodplain.The northern section is two lane, unlit and is relatively lightly trafficked, with the majority of traffic entering at a grade-separated parclo interchange with Port Hills Road which connects via the Opawa Expressway to the north and west.South of the interchange the motorway climbs the western side of the Heathcote Valley, with a crawler lane and passing through some cuttings.[citation needed] It is designated a motorway, with pedestrians and cyclists excluded, although for the most part the road is 2-3 lane undivided carriageway.