Main Roads Heavy Vehicle Services is pleased to advise that we have worked with the National Transport Research Organisation (NTRO) to develop a suite of Restricted Access Vehicle Route Assessment Tools (RAVRAT), created to assist road managers and transport operators in understanding the capabilities of different RAV combinations and the impacts they may have on the road infrastructure.  The following online resources are now available.

RAV Grade Calculator
The RAV Grade Calculator enables the user to determine the maximum grade before a tandem drive or tri-drive vehicle combination will lose traction, based on the vehicle drive axle group mass and road surface friction factor.

ESA Calculator
The ESA Calculator enables the user to determine the pavement wear for different heavy vehicle combinations, based on the number of Equivalent Standard Axles (ESA) and ESA per payload tonne.

Intersection Acceleration Risk Tool

The Intersection Acceleration Risk Tool enables the user to compare the acceleration performance of a proposed vehicle with an existing vehicle through a specific intersection.

With assistance from NTRO, all these resources have been specifically developed to enhance the understanding of heavy vehicle performance and their impacts on road infrastructure, with the insights provided assisting in making more informed access decisions.

A link to the RAVRAT portal is available on the Access Requirements in WA page on our website

For further information, please contact the HVS Helpdesk on 138 486 or email hvs@mainroads.wa.gov.au 

Heavy Vehicle Services

30 August 2024

Please note: This HVS Update will be published for 1 month.