Glossary of terms used on this site

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Term Definition

Individual axle mass


Intelligent Access Program - Austroads program which invites third party service providers (the private sector) to monitor in real time the compliance of heavy vehicles in following jurisdictional regulations such as speed, load and route access.  In exchange for being monitored with the use of ITS technologies such as on-board GPS units, the transport industry expects to gain a concession in accessing a road network.


International Roughness Index for road surfaces.


Integrated Road Information System of Western Australia.