NHVR Load Mass and Dimension Awareness Training

NHVR Load Mass and Dimension Awareness Training

Drivers play a critical role, and apart of this is the Pre start checks that must be completed before every journey, as failure to conduct them thoroughly can create serious safety risks.

Drivers should:

  • Undertake a thorough visual inspection of couplings— including drawbars and towbars – removing any covers or protective plates to check for wear, damage, or defects, and report any issues before moving the combination.
  • Ensure coupling components are clean and free from dirt or debris that may prevent proper engagement of couplings or locking mechanisms.
  • Ensure all air lines, electrical cables, and safety chains are correctly secured and operational before departure.
  • Conduct a walk around of the combination and complete a final visual check.
  • Perform a tug test prior to departure.

NVHR Load Mass & Dimension Calculations Changes in Industry from 1st August, 2026.

Changes to Heavy Vehicle National Law Calculations & Planning- Workshop

From 1 August 2026, prescribed general access mass and vehicle length limits will change under the amended MDL Regulations, following the implementation of the Heavy Vehicle National Law Amendment Bill 2025.

The proposed changes will:

  • Increase General Mass Limits (GML) to align with the current Concessional Mass Limits (CML)
  • Expand Euro VI concessions to include road trains.
  • Increase the length limit for vehicles from 19 metres to 20 metres. (Note: B-doubles are not included in the current regulations but will be considered in future regulatory amendments).
  • Amend the tow mass ratio and associated conditions for tag trailers.

These changes are still subject to ministerial approval, and until the new legislation and regulations come into effect, the existing MDL rules remain in place.

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