Traffic signal design and operation

Find out what we do behind the scenes and how to get in touch.


VicRoads are responsible for the safety and efficiency of traffic signals throughout Victoria.

Before construction of new or upgraded traffic signals, we:

  • analyse the impact the new or changed signals will have on the existing network
  • check the traffic signal layout to make sure it is safe and efficient
  • design how the new signals will operate
  • create the computer program to control them.

After traffic signals are turned on, we continue to monitor the signals on the network and regularly:

  • investigate and respond to queries from the community and other stakeholders
  • review routes and areas to ensure they are operating in line with the Movement & Place framework
  • modify the timing of traffic signals in real-time due to unplanned disruptions (eg. car crashes; emergencies, etc)
  • prepare temporary signal changes to minimise congestion for planned disruptions (eg. roadworks and events).

From traffic signal planning, design and operation, VicRoads works with our customers to ensure a safe and reliable journey for everyone on the road network.

Traffic signal enquiries

For enquiries about traffic signal operations
Call: 13 11 71 or use the feedback form.



Was this page helpful?


Please tell us why (but don't leave your personal details here - message us if you need help or have questions).