Winstone Aggregates has been participating in a haulage productivity trial for the New Zealand Ministry of Transport. The trial covers the operation of truck and trailer units loaded to 50 tonnes, around 13% more than the 44 tonnes currently legislated. The trials are an integral step towards the investigation of greater efficiency in the way freight is moved on NZ roads.

A controlled permit system that allows vehicles to operate at heavier weights has the potential to reduce the number of vehicle movements required to distribute the same amount of freight. The offset of this is a reduction in fuel consumption and a contribution to the Government's sustainability objectives.

The results of the trial:

* 12% increase in Road User Charges

* 15,330 less kilometres travelled

* 256 less loads carried

* 6,482 litres fuel saved

* 14% reduction in carbon footprint