In Western Australia, the main application for TMAs is for the set up or short-term protection of works on or adjacent to Freeways or High-Speed Multilane Carriageways (where they are mandatory, see Traffic Management for Works on Roads Code of Practice).
Where a TMA is used on a Freeway or road with a permanent speed limit of 90 km/h or more, it must be a TL-3 TMA.
What is a Truck Mounted Attenuators Required in WA?
A Truck Mounted Attenuator (TMA) is defined as a combination of Host Vehicle (Truck) and Impact Attenuator Unit, mounted on the Host Vehicle to protect road workers. The Impact Attenuator Unit, also known as a crash cushion or crash attenuator, is a device intended to reduce the damage done to structures, vehicles and motorists resulting from a motor vehicle collision. Impact Attenuator units are designed to absorb the vehicles’ kinetic energy and/or redirect the vehicles away from the hazard, and from roadwork machinery or workers.
TMAs are used for the protection of works on or adjacent to high-speed roads with high traffic volumes.
TMA Use in Perth and Regional WA
In Perth, Truck Mounted Attenuators are commonly used on freeways, highways, and major transport corridors. In regional areas such as Bunbury, TMAs are frequently required for highway maintenance, resurfacing, and utility works.
Compliance and Safety Considerations
Using a compliant and well-maintained Truck Mounted Attenuator operated by trained personnel is essential. Incorrect setup or misuse can reduce effectiveness and create additional risks.
Conclusion
If your works expose workers to live traffic on WA roads, a Truck Mounted Attenuator may be required. Consulting an experienced traffic management provider ensures the correct equipment is used in line with Main Roads WA requirements.
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