That meant targeted expenditure signalled in the Government Policy Statement on land transport funding for the coming years would exceed forecast revenue by around $220 million over the 2012 - 15 period.
To meet that shortfall, a package of initiatives had been developed, "to give the NZTA the funding certainty it needs to continue to deliver transport infrastructure and services, including State Highway improvements and the Roads of National Significance programme", Mr Brownlee said.
The initiatives were:
- Increases in petrol excise duty and road user charges from 2013/14 in order to lift revenue to match expenditure;
- A short-term, one-off $100 million borrowing facility for the NZTA to manage cash-flow variations; and,
- Setting the annual contribution to the Canterbury roading recovery from the National Land Transport Fund at $50 million a year with costs over this amount met from outside the Fund.
Mr Brownlee said New Zealanders were driving more kilometres than ever, but consumption of fuel to travel that distance was declining due to a more fuel efficient vehicle fleet and that was affecting the revenue going into the fund.
By helping match revenue to expenditure, future increases in fuel excise duty and road user charges would "keep momentum on a range of projects".
The increases would be "in the realms of the rate of inflation".
He said the short-term borrowing facility for the NZTA was "a one-off means for addressing an immediate funding gap and will help to spread costs out over a number of years".
The amount being borrowed would not breach the agency's current debt cap.
Additional borrowing by the agency which will be permitted under new legislation would not be required under the 2012 -2015 plan.
Final details and decisions of the funding package, including decisions on fuel excise and road user charges increases, would be announced before the end of the year.
The $12.3 billion National Land Transport Programme 2012-2015 includes:
• State Highways: $5.14b up 7 per cent on 2009-2012
• Local Roads: $4.06b up 14 per cent
• Public Transport: $1.74b up 21 per cent
• Emergency Works including Christchurch Recovery: $690 million