New Zealand State Highway 20 New Zealand State Highway 20 State Highway 20, also known as the Southwestern Motorway, is a New Zealand state highway linking State Highway 1 at Manukau City Centre with State Highway 16 in Point Chevalier, via Mangere and Onehunga. Along with its spurs, State Highway 20A and 20B, the state highway serves Auckland Airport, the country's largest, therefore making State Highway 20 a key arterial route connecting the airport to the wider Auckland region and most of the upper North Island. The route also forms the southern part of the Western Ring Route, a motorway route bypassing central Auckland. It
Hamilton Airport (New Zealand) to blossom soon after the war was over, and, in 1950, the airport received its first commercial flight. The main runway was sealed in 1965, and turboprop flights began to Hamilton that year, with NAC's Fokker Friendship aircraft operating. The runway was further lengthened to accommodate Vickers Viscount, 1970, and ultimately Boeing 737 aircraft types in 1975. In 1989, the New Zealand government sold the airport to councils representing Hamilton city (50 per cent), Waikato district (15.625 per cent), Waipa district (15.625 per cent), Matamata-Piako district (15.625 per cent) and Otorohonga district (3.125 per cent). This development led to unprecedented