We’re adding extra lanes and building new intersections along the Princes Highway between Winchelsea and Colac to make your journey quicker and safer.


In 2015, we started adding extra lanes on the Princes Highway between Winchelsea and Colac.

This project is building more than 35km of extra lanes and new intersections.

The upgrade will be separated into four stages:

  • Deans Marsh Road, Winchelsea to Armytage Road
  • Armytage Road to Warncoort
  • Warncoort to Colac East
  • Colac East and Colac.

We expect to complete the upgrade in 2019

Princes Highway Duplication Map – Winchelsea to Cola

View a larger version of the map (PDF, 171.5 KB)


The Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) provides a legal framework to protect and manage nationally and internationally important flora, fauna, ecological communities and heritage places. We are committed to minimising our impact on the environment and heritage places. We are required to report annually on our compliance with conditions set out by the Australian Government.

View the:

37km of upgrades between Winchelsea and Colac

New flexible safety barriers

Project finished by end of 2019

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