Transport Minister Chris Bishop has rejected the trucking industry's request to increase truck weight limits, saying the costs to roading infrastructure would far exceed any fuel savings.
Bishop announced the decision at the Transporting New Zealand conference after officials modelled the potential impact. The analysis found that while relaxed weight restrictions would save up to 16 million litres of diesel over six months - equivalent to about 1.5 days of national diesel use - the change would cause approximately $150 million in additional infrastructure damage over the same period.
"Not because we're opposed to change, but because the analysis didn't stack up," Bishop said. "When it came down to it, the clear advice that we received is that the costs outweighed the benefits."
The trucking sector has repeatedly pressed Government to relax weight restrictions, intensifying its campaign during the current fuel crisis with arguments that heavier loads would cut the number of trips required and reduce fuel consumption.
The measure remains available as a contingency option if the fuel crisis worsens. Bishop said broader reform of vehicle weights and dimensions is underway, but stressed this requires sufficient lead time for the transport agency to plan road design and maintenance changes.
Bishop and Regulation Minister David Seymour confirmed other fuel crisis response measures will take effect from 6 August 2026.