Northland Inc chief executive David Wilson, chairman Warren Moyes, Mr Davis and tourism consultant Brian Roberts presented the case, saying the investment could lead to an extra $20 million from visitors over the next five to seven years. A tourism economic assessment indicated it could create 200 new jobs before then.
The key point was that improving the now tired Twin Coast brand would spread regional growth, not just boost tourism, the Northland Inc heads said.
The funding will provide the leverage needed to attract another $1 million from other partners including the private sector, iwi and Northland's three district councils.
The upgrade would include developing a Northland attraction and information phone app, extending the route to Auckland Airport, signposting it with a trail of carved pou provided by iwi and new road signs.
Investors being courted for their contribution include NZTA which has indicated it will provide $60,000 in signs and Tourism New Zealand bringing $50,000 in marketing.
The scheme relies heavily on buy-in from Auckland, with the Twin Coast to be rebranded as an Auckland-Northland route. Northland Inc expects the project's tactical and infrastructure plan to be in place by mid-2016.