THE NHVR and NSW Road and Maritime Services have agreed to extend the current brake testing transition arrangements in NSW until September 29, 2017.
NHVR Director Safety Daniel Elkins said the recommendation for a detailed procedure for conducting a roller brake test was made by the NHVR's Technical Working Group.
"We now have a better understanding why some heavy vehicles deliver different results and how that relates to the test procedure being used," Mr Elkins said.
"We've agreed to develop and publish a National Roller Brake Test Procedure in the coming months."
The issue of roller brake testing underwent an extensive examination by the NHVR's Technical Working Group members, including the Commercial Vehicle Industry Association Australia, Truck Industry Council, Heavy Vehicle Industry Australia, Australian Trucking Association and other subject matter experts.
During the transition period in NSW heavy vehicles that achieved a brake test result greater than 3kN/t, but less than 4.4kN/t will be given an official warning on first time detection.
The current transition period was due to end on June 30.