Indian Ocean Drive

  • ​Between Two Rocks and Lancelin 
  • Construction is expected to be completed late-2019
  • Works are part of a safety improvement package


After a series of serious crashes on Indian Ocean Drive between Two Rocks and Lancelin, an Indian Ocean Drive Safety Review Group was established in August 2017 to examine road safety issues on this stretch of road, and make recommendations on what measures would improve safety.

Some of the immediate short-term responses actioned include:

  • Speed limit reduction from 110 km/h to 100 km/h. The recommendation was informed by a ‘real world’ speed assessment undertaken as part of the review, coupled with speed data, infringements from Western Australia Police Force and public feedback. Based on this data, the current median operating speed on this stretch of road was found to vary from 99-to-103km/h.
    • As a result, the report “determined that reducing the speed limit until other infrastructure enhancements could be implemented would improve public safety”
    • The speed limit change will only increase travel time between Two Rocks Turnoff and Lancelin by an extra three minutes. The 100 km/h speed limit will start at the end of the 90 km/h zone located approximately 4 km south of Breakwater Drive, and continue until the start of the 90 km/h just south of K.W. Road.
    • The speed limit will be reassessed once all recommended infrastructure improvements have been finalised.
  • Installation of edge and centre audible line marking. By providing an audible warning to prompt driver recovery, this treatment has the capacity to reduce head-on crashes as well as single vehicle ‘run-off to the right’ crashes.
  • Improved signage. Installation of curve warning signs, wildlife warning signs and replacement of guide signs.
  • Widening of the road north from Breakwater Drive. The overtaking lanes and the infill widened section have incorporated a Wide Centre Line Treatment (WCLT) to provide further safety improvements. The sections between these new passing lanes have also been upgraded with 14 km of WCLT.

Project Update 

Construction of four new overtaking lanes, two northbound and two southbound between Seabird and Lancelin were completed December 2018. Widening and WCLT linemarking works are ongoing and due for completion late-2019. 


  • February 2018: Installation of signage completed
  • April 2018: Installation of audible lines completed
  • April – December 2018: Construction of overtaking lanes completed
  • January 2019: Further widening works commenced
  • Late-2019: Widening and linemarking works due for completion



  • Significantly improve road safety
  • Provide safer overtaking opportunities
Last Updated: 11 June 2019