Main Roads Western Australia has unveiled updated designs for the Tonkin Highway-Hale Road interchange, part of the $366 million Tonkin Highway – Roe Highway to Kelvin Road Upgrade project.
Initial planning at this intersection leading up to mid-2019 determined that a bridge would be built to take Tonkin Highway over Hale Road with no access ramps to and from Hale Road; and Hale Road would stay open to allow local traffic to easily travel between Forrestfield and Wattle Grove.
However, the local community were concerned about not being able to access Tonkin Highway from Hale Road. After reviewing various options, Main Roads WA changed the design in May 2020 to include north-facing ramps.
However, upon further review, it was found vehicles could not safely enter Tonkin Highway from Hale Road at 100 km/hr as there was not enough space to allow safe weaving movements.
The new updated designs directly connect Tonkin Highway northbound and Hale Road via a new road that will be constructed alongside the highway, allowing traffic to merge more efficiently and safely.
Upgrades will include widening Tonkin Highway from just south of Roe Highway to Kelvin Road from four to six lanes and to a freeway standard.
The improvements will also include new lighting, signage, pavement marking and landscaping.
When completed, Stage 1 of the Tonkin Highway Grade Separations project will include a half-diamond interchange at Tonkin Highway and Hale Road with north-facing ramps, a diamond interchange at Tonkin Highway and Welshpool Road, and adjacent roads to connect the ramps between Hale Road and Roe Highway.
This will include the further widening of the east side of the Tonkin Highway to three lanes.
Works will also include a new path for pedestrians and cyclists with connections to local networks.
Western Australia Minister for Transport Rita Saffioti said that the $366 million project will support the projected population growth throughout the area.
“Tonkin Highway is a key freight corridor and we are working to deliver a number of major improvements, including NorthLink WA which is now complete, the Tonkin Gap Project and the extension from Byford to Mundijong,” Saffioti said.
“This investment will create 2,500 local jobs and opportunities for businesses and ensures we are building the infrastructure needed for our future.”
The Tonkin Gap project is being delivered by the Tonkin Gap alliance, comprised of BMD, Georgiou Group, WA Limestone, BG&E and GHD.
The project is being jointly funded by the Federal ($293 million) and Western Australian ($73 million) Governments.
Detailed design and construction for Tonkin Highway at Hale Road and Welshpool Road is scheduled to start in late 2021/early 2022, with construction at Kelvin Road to commence in 2023.
Main Roads WA is currently undertaking a feedback survey for the updated designs, with the survey live until Friday 15 October 2021. For more information, please visit here.