The Transport Minister says a balance must be struck between building much needed infrastructure and paying for it.

The Government has released its $21 billion spending roadmap, which includes new major roads and a pothole prevention fund.

Vehicle registration fees will increase by $25 dollars next January, then again in three years, to help cover costs.

Minister Simeon Brown says it's a gradual phase-in.

"This fee hasn't increased since 1994, so yes, we need to fund it. This is how we're proposing to do it, there's no fuel tax increases during this term of Government."

But if re-elected, the Government has committed to fuel tax hikes next term.

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