Traffic Escort Services

Traffic Escort Wardens are managed by Main Roads and authorised by the Commissioner of Police to facilitate the safe movement of Oversize Over-Mass (OSOM) loads on the Western Australian road network.

 In WA, a Traffic Escort Warden is required if a load is wider than 5.5 metres in width aImage: Traffic Escort Vehicle OSOM Newman 2017 - web page header.JPGnd/or longer than 40 metres in length.

OSOM Loads are usually accompanied by one or more heavy vehicle pilot(s) and the largest OSOM loads are also accompanied by a Traffic Escort vehicle. Their job is to warn other road users of the presence of large, slow-moving loads. Pilot vehicles are identified by their orange flashing lights and warning signage on the roof of the vehicle.

Under the Road Traffic Code 2000 ,Traffic Escort Wardens have the same powers as WA Police Officers in relation to directing traffic for the purpose of facilitating the movement of an oversize load.

To assist road users interact with Oversize Over-Mass loads we have created the Sharing the Road with oversize loads brochure.

Engaging a Traffic Escort Warden

To engage the services of our Traffic Escort Wardens, as set out in Section 18B of the Main Roads Act 1930, a Traffic Escort Services Head Agreement must be completed and signed by a company director or suitably authorized person, prior to traffic escort services being provided by Main Roads.  The Traffic Escort Services Head Agreement is a legally binding ongoing contract between Main Roads and the Client  (eg: Transport Operator / Company).

Traffic Escort services are subject to the contract conditions which set out the terms, conditions, roles and responsibilities of each group involved in the contract conditions and should be read in conjunction with the Traffic Escort Services Provision Policy.

Contact Details

Phone: 138 486


Business Hours: Monday to Friday from 8am to 4.30pm


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Modified: 16 Jun 2020