1. Technical Guidelines (ITS)

Document No:  67-08-71
Revision:  5B
Date amended:  11-Dec-2015
The information below is intended to reflect the preferred practice of Main Roads Western Australia ("Main Roads"). Main Roads reserves the right to update this information at any time without notice. If you have any questions or comments please contact Asset Manager Traffic Systems Joe Wisolith by e-mail or on (08) 9428 2240.
To the extent permitted by law, Main Roads, its employees, agents, authors and contributors are not liable for any loss resulting from any action taken or reliance made by you on the information herein displayed.

Revision Register


Ed/Version Number Clause Number Description of Revision Date
1 All  Guideline Developed  10-Feb-2003 
2 All Guideline Revised and Approved 16-Sep-2005
2A 3 Drawing 200431-0080 amended. 11-Nov-2008
3 All Formatting change. 05-Nov-2011
4 All Managed Freeways Provision Guidelines added. Contacts updated. 15-Apr-2014
5 ITS Ducts "Main Roads Specification 704 - ITS Ducts" changed to "Main Roads Speccification 704 - Cable Conduits for Intelligent Transport Systems” 14-Aug-2014
​5A​Header​Guideline introduction amended.​14-May-2015
​5B​3​Drawing 200431-0080 amended.​11-Dec-2015

Table of Content


Technical details for design / purchase and installation of ITS technology shall be set by the Asset Manager Traffic Systems.

Further details for technical guidelines for ITS can be found in the Managed Freeways Technical (Electrical and Electronic) Requirements documents for each ITS application.

The following ITS technologies have a mandatory design/documentation requirement for purchase and for installation: 

All new traffic signal installations shall be connected  to SCATS via a nominated ITS communications cabin, node or the Traffic Operations Centre. Typically new traffic signals are connected by ADSL or optic fibre where available. The method of communication for a specific site should be chosen in consultation with the Traffic Systems Operations Coordinator.


TRAFFIC SURVEILLANCE - Perth Metropolitan Area
Some road projects may require the installation of video-cameras at strategic locations for traffic surveillance and the cameras' connection to the Traffic Operations Centre.

Ducts shall be provided through all major structures (bridges, interchanges etc) to facilitate the installation of possible future video-cameras.

Typically one (1) 50 mm white communication conduit and one (1) 50 mm orange electrical conduit are installed.

For bridge camera pole base see drawings 0430-0746 & 0430-0747.

For bridge mounted camera pole see drawing 0430-0748.


ITS DUCTS - Perth Metropolitan Area

Ducts are typically installed along most major roads (CAH's & Freeways) to facilitate the installation of a communications backbone for possible future ITS technologies. It is envisaged fibre optic cable will form the basis of this communications network.

Ducts shall be provided through all major structures (bridges, interchanges etc)

Some major roads require ducts the full length of the road.

Ducts may share common trenching with other electrical services (e.g. road lighting).

The number/size/colour/lay-up of the ducts shall be clearly shown on a scaled AutoCAD drawing marked Electrical Services complying with Main Roads drawing presentation guidelines.

Guideline drawings for ITS ducts are;

  • 200431-0080     Fibre Optic Pit & Cable Route Markers
  • 200431-0081     Typical Trench Crossing Section & Cable Pit Configuration
  • 200531-0003     Cable Pit Conduit Entry Details & Plinth Details

The duct material and installation requirements shall comply with Main Roads Specification 704 - Cable Conduits for Intelligent Transport Systems.