Tonkin Highway Grade Separated Interchanges (Hale Road and Welshpool Road) (Updated)

Closed 7 Apr 2021

Opened 30 Mar 2021


The Commissioner of Main Roads Western Australia (Main Roads) is proposing to widen Tonkin Highway from south of Roe Highway to approximately one kilometre north of Kelvin Road to a six-lane dual carriageway. The proposal includes construction of a half diamond interchange with north facing ramps at the Hale Road intersection in Forrestfield, and a grade-separated interchange at the intersection of Tonkin Highway and Welshpool Road in Wattle Grove. 

The proposal includes construction of a Principal Shared Path and installation of road, drainage and other associated infrastructure.

(Main Roads WA referred the proposal in November 2019, but suspended the 7 day public comment period at that time in response to stakeholder consultation. MRWA have now provided further information to the EPA regarding the design of the interchange. The referral information uploaded to the EPA website has been updated to reflect this new information).

Why your views matter

At this initial stage of the EIA process, comment is simply sought on whether or not the EPA should assess a proposal and, if so, what level of assessment is considered appropriate.

What happens next

Following the seven day public comment period and consideration of any comments received, the EPA will decide whether or not this proposal requires environmental impact assessment and, if so, what level of assessment will be applied.

The EPA's decisions on level of assessment are released each Monday on the EPA's website.


  • All of Western Australia


  • Public


  • Seven-day comment on referrals