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NSW to fall into line

ROLLING ALONG: Research shows road trains with tri-axle dollies are more controllable at higher speeds.”
ROLLING ALONG: Research shows road trains with tri-axle dollies are more controllable at higher speeds.”

The Minister for Roads and Ports Duncan Gay has approved changes to NSW heavy vehicle mass rules which will improve the productivity of the state's road transport industry.

"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," Peter Wells of Customer and Compliance said.

"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 higher mass limits (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," Mr Wells said.

"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."

The Class Two Road Train Notice 2010 and road train HML permits will be amended and in operation by June 30.

'...road trains with tri-axle dollies are more stable and are more controllable ...

Topics:  duncan gay, road trains, trial


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