Disappointment at the idea of hiking fuel taxes.

Treasury warns rising costs in the transport sector and a large loan granted to Waka Kotahi may mean an increase in Fuel Excise Duty and Road User Charges is needed.

It says they may need to go up from July 1 next year.

National Road Carriers Chief Executive Justin Tighe-Umbers told Mike Hosking first we need to spend on what's essential - and then fix the funding model.

LISTEN ABOVE