TMA/IAP is a mandatory requirement for some heavy vehicle combinations. The TMA/IAP is a national program developed in partnership with all Australian road agencies. It allows participating operators access, or improved access to the road network in return for TMA/IAP monitoring and compliance with access conditions imposed by road authorities or road managers.
Heavy vehicles are monitored using telematics services with an in-vehicle unit (IVU). The IVU is supplied and operated by a TMA/IAP service provider. IVUs use satellite tracking and wireless communication technology to remotely monitor where, when and how heavy vehicles are being operated on the road network.