Traffic Escort Services

Traffic Escort Vehicle

The road transport industry makes a vital contribution to Western Australia’s economy.  Due to Western Australia’s remote and rugged nature, there is often no alternative but to move very large items by road. 

Each year, Main Roads Traffic Escort Wardens escort in excess of 1,100 oversize over mass loads in or across Western Australia.  Main Roads facilitates the transport of oversize and/or over mass items for metropolitan and regional infrastructure projects, as well as the mining and resources industry.

Vehicles carrying oversize over mass (OSOM) loads come in a wide variety of shapes and sizes, typically moving much slower than ordinary traffic and taking up a greater proportion of road width than other vehicles. Oversize and/or over mass vehicles are often escorted by Heavy Vehicle Pilots and/or Traffic Escort Wardens, whose job it is to alert other road users to the presence of large, slow-moving loads and ensure everyone can share the road safely. The movement of OSOM loads by road is strictly regulated to ensure safety for all road users. For more information regarding sharing the road with oversize loads please read our brochure.

Traffic Escort Wardens are managed by Main Roads and authorised by the Commissioner of Police to facilitate the safe movement of OSOM loads on the Western Australian road network. A Traffic Escort Warden is required if a load is wider than 5.5 metres in width and/or longer than 40 metres in length, and for any oversize loads moving on the freeway(s), Abernethy Loop or movement through the bollards.

Traffic escort vehicles are equipped with red and blue flashing lights situated on the roof of the vehicle.  These will be in use when the vehicle is escorting an OSOM load. The vehicle also has the words “Traffic Escort” clearly displayed on both sides 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.

OSOM loads are usually accompanied by one or more heavy vehicle pilots 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.

If you would like further advice regarding sharing the road with OSOM loads including, what to do when encountering an OSOM load on your journey, please see the “sharing the roads with oversize loads” or view our brochure.

Engaging a Traffic Escort Warden

To engage the services of a MRWA Traffic Escort Warden, as set out in Section 18B of the Main Roads Act 1930, a Traffic Escort Services 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 Agreement is a legally binding ongoing contract between Main Roads and the Client  (eg: Transport Operator / Company).

Traffic Escort Services are subject to the Traffic Escort Services Terms and Conditions which set out the terms, conditions, roles and responsibilities of each group involved in the contract (Traffic Escort Service Agreement) and should be read in conjunction with the Traffic Escort Service Policy.

Traffic Escort Fees – excl. GST
Traffic Escort Service

​Fees *

 (all amounts are per warden and excl. GST)

​Daily Rate (metro area only)​$2,080
​Standard day/night move (statewide)$2,600

​Convoy move
(day-time and / or night-time convoys of three or more vehicles)

​Short Move (daytime movement only)​$1,040
​Cancellation / Amendment Fee​$550

 *The total cost is calculated from the commencement of the Traffic Escort Warden pre-start checks at the nominated departure point to the journey end point.

Contact Details
​ ​Traffic Escort Scheduling
Traffic Escort Services​ ​ ​​Phone: 138 HVO (138 486)
​Business Hours: 8 am - 4.30 pm Monday - Friday


Metropolitan Traffic Escort Guidelines

*Please note: the correct Main Roads RAV Permit must be provided to the Traffic Escort Warden prior to the departure of an escorted road.


Up to 5.50 m wide

​No Traffic Escort required​Over 2.7 m wide
Monday to Friday  - 7:30am - 9 am and
4:30 pm to 6 pm
​5.51m - 6.50 m wide​Traffic Escort required​Monday to Friday
7:30 am to 9 am and 4:30 pm to 6 pm
​6.51m - 8.50 m wide​Traffic Escort required

No movement on Fridays.  
Movement allowed Monday to Thursday between 10 am to 2 pm ONLY, and - weekends between sunrise and sunset. 

​8.51 m wide and above

(departing metro areas only)

​Traffic Escort required​Monday to Friday.
(movement allowed Saturday and Sunday between sunrise and sunset).
​Up to 40 m length​No Traffic Escort required

​Monday to Friday 
7:30 am to 9 am and 4:30 pm to 6 pm.

​40.1 m length and above

​Traffic Escort required  

​No movement on Friday

(Movement allowed Monday to Thursday - 10 am to 2 pm ONLY and Saturday and Sunday between sunrise to sunset)

All OSOM loads on Graham Farmer, Kwinana and Mitchell Freeways


Traffic Escort required (plus minimum 2 pilots required).




2 x Traffic Escort required (plus minimum 2 pilots required)

Sunday to Thursday
11 pm- 5 am
​All OSOM loads through bollards​Escort Required (minimum requirement - Traffic Escort for duration of bollard crossing)​Curfew is determined by the dimensions of the loads/s requiring access to the bollards.




Modified: 12 Feb 2018