Oversize vehicles access

Transporting oversize loads can be dangerous, especially if steps are not taken to ensure the load remains a safe distance from powerlines

Main Roads WA requires Western Power to authorise all load movements around the State where the load is more than 4.3m high (4.6m for livestock vehicles and towed agricultural machinery). Transport operators must refer to Main Roads WA before applying to Western Power for authorisation.

Authorisation to transport oversized loads

Once we receive your application we will assess if the load can travel safely and what special conditions, if any, are required. We will then issue an Oversize Load Movement Authorisation setting out the conditions which must be adhered to at all times.

In some cases substantial planning and/or construction works are required (e.g. undergrounding, moving or raising powerlines). In these cases Western Power will quote on the work required.

Load movements within Western Power and Horizon Power networks (inter-district)

If you need to transport oversize loads between Western Power’s network and Horizon Power’s network, you can lodge a single inter-district application for travel with the network at the point of origin. Please refer to this map (PDF 700 Kb) that shows the boundaries for Western Power and Horizon Power.

Load movements outside the Western Power network

If you need to transport oversize loads in outside of the SWIS in Western Australia, please refer to Horizon Power.

Costs

Fees for processing online applications are payable by credit card.

1. To move oversize loads within Western Power’s network - $120 inclusive of GST.
2. Inter-district travel between Western Power and Horizon Power network - $270 inclusive of GST.
3. Escort costs for Western Power services are charged as per our advertised schedule of rates.
4. For all inter-district applications resulting in escort services from both Western Power and Horizon Power, you will receive two invoices.

Line heights

Escort rates

Charges will be incurred once the crew is dispatched. Please provide sufficient notice (minimum of one working day) of cancelled or amended escort arrangements in writing.

Half day rates

Full day rates

High wide load corridors are managed by Main Roads WA

Transport operators must refer to Main Roads WA before applying for authorisation.

Case Study – Oversize vehicle movement

Tracey works for a small company that provides heavy haulage mining equipment and needs to arrange a delivery of earth equipment to site. The equipment is 5m high.

Tracey contacts Main Roads WA with her route plan to get a permit for travel. As the height of the load is over 4.3m, Main Roads WA directs Tracy to seek authorisation from Western Power. Loads over 4.3m high will often be very close to powerlines.

Western Power assesses Tracey’s application and determines that an escort is required to ensure that the vehicle is kept clear of powerlines at all times.

As such the network operator makes contact with Tracey to discuss the implications. Tracey and Western Power come to terms on their approach to the job. An Oversized Load Movement Authorisation is issued. Tracey understands that once the authorisation is issued no changes can be made. If changes are required a new authorisation must be issued, incurring a new permit processing fee.