The Transport Minister says the petrol tax needs replacing - to keep up revenue for maintaining roads.
Chris Bishop's announced universal road user charges will be implemented for all vehicles, to be paid like a bill.
The Government wants payments to reflect road-use, not a vehicle's fuel-efficiency.
Bishop says with 350,000 hybrids on the road, fewer people are paying fuel taxes.
He explained the national land transport fund's revenue is slowly diminishing - which is needed to maintain existing roads and build new ones.
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