NSW adjusts road train mass rules

Gay honours pledge as new tri-axle dolly policy aligns state with neighbours

May 8, 2012

New South Wales Roads Minister Duncan Gay has proved good as his word with the approval of changes to NSW heavy vehicle mass rules that bring the state into line with others that allow road trains.

When tackled at the recent Australian Logistics Council Forum about uniform road rules, Gay was unequivocal in his support.

Now, Roads & Maritime Services (RMS) has announced that the Class Two Road Train Notice 2010 and road train higher mass limits (HML) permits will be amended and in operation by June 30.

Explaining the change, Acting Director Customer and Compliance Peter Wells says: "Previously, tri-axle converter dollies used in road trains were not allowed the tri-axle mass limits and instead were limited to the mass of a tandem axle group, which is up to 17 tonnes.

"To improve productivity, RMS carried out a review of the tri-axle dolly policy to allow them to operate on the type one and type two road train networks at tri-axle mass limits, which is up to 20 tonnes at general mass limits (GML), 21 tonnes at concessional mass limits (CML) and 22.5 tonnes at HML.

"This means type one and two road train combinations incorporating tri-axle dollies fitted with certified road friendly suspension will be able to operate on each appropriate road train network at total combination mass limits of up to 82.5 tonnes at GML, 84.5 tonnes at CML and 90.5 tonnes at HML for type one road trains, and 122.5 tonnes at GML and 124.5 tonnes at CML for type two road trains."

The change brings NSW rules in line with Queensland, Western Australia and South Australia.

"RMS considered the impact on state and local road and bridge infrastructure and road safety before making the change," Wells says.

"The new rules mean tri-axle dollies fitted with road-friendly suspension will have a lower per tyre capacity compared to a tandem dolly, so roads will be impacted less.

"Research carried out by the National Road Transport Commission shows road trains with tri-axle dollies are more stable and are more controllable at higher speeds."

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