Tonkin Gap Project

What's Happening

New PSP under Redcliffe Bridge is now open

The Principal Shared Path (PSP) across the river, underneath the new Redcliffe Bridge has just opened. The team will be finalising work during the coming months.

Widening works continue along Tonkin Highway

We are continuing works to widen Tonkin Highway between Dunreath Drive and Collier Road. This includes bulk excavation, drainage installation and asphalting along Tonkin Highway. We will have lane and ramp closures at night on Tonkin Highway between Collier Road and Dunreath Drive. Keep an eye on this page and the Tonkin Gap Facebook group for details as we progress with the works.

Great Eastern Highway upgrade continues

Have you been on the new Great Eastern Highway underpass? Finishing works including patching and painting will continue.

In late March, we will start work for the new directional signage over Great Eastern Highway. During installation, we will need to close the footpath on Great Eastern Highway eastbound between The Ascot Apartments and Tonkin Highway for approximately two months. Stay tuned for details and a detour map.

Redcliffe Bridge progress

We are planning to open the new Redcliffe Bridge Principal Shared Path (PSP) this month. Following the opening of the PSP, the existing path will need to close so we can start installing noise walls. Stay tuned for the opening date.

You can find more information on other upcoming works in the latest Construction update.

See more projects news »

Strollers and cyclists make most of the new underpass!

Pedestrians and cyclists are enjoying the new underpass built at Great Eastern Highway in Redcliffe.

Redcliffe Bridge activation update

As part of our project works, we are activating an area under Redcliffe Bridge, as a community space.

Project site tours provide learning opportunities

The Tonkin Gap Project has presented many learning opportunities for people working in fields related to major transport projects.

See more projects news »

Roadworks and path closures

Tonkin Highway southbound on-ramp from Morley Drive

29 to 30 March 8pm to 4am
31 March 8pm to 6am
Ramp closure
Detour
Retaining Wall Works

Tonkin Highway southbound between Morley Drive and Collier Road

27 to 30 March 8pm to 4am
31 March 8pm to 6am
Lane closure
Retaining Wall Works

Broun Avenue between Embleton Avenue and Beechboro Road North

29 to 31 March 8pm to 6am
Road closure
Detour
Footpath and Median Works

Tonkin Highway between Hepburn Avenue and Reid Highway

29 to 30 March 7pm to 5am
Lane closures
Road realignment works

Tonkin Highway southbound on-ramp from Hepburn Avenue and Beechboro Road North

29 to 30 March 7pm to 5am
Ramp closure
Detour
Road realignment works

Tonkin Highway southbound off-ramp to Reid Highway

30 March 7pm to 5am
Ramp closure
Detour
Road realignment works

Tonkin Highway southbound at Hepburn Avenue and Beechboro Road North

31 March 7pm to 3 April 4am
Road closure
Detour
Road realignment works

Hepburn Avenue eastbound between Bellefin Drive and Tonkin Highway

31 March 7pm to 3 April 4am
Road closure
Detour
Road realignment works

Long-term impacts

Broun Avenue and Embleton Avenue intersection

21 February from 5am to mid-2023 (24 hour works)
Broun Avenue eastbound will be reduced to one lane, with the right turn from Broun Avenue eastbound to Embleton Avenue southbound closed.
- To travel south on Embleton Avenue please turn left at Bath Road, right at Addlestone Road and right onto Embleton Avenue
Right turn will be closed from Broun Avenue westbound to Addlestone Road.
- Turn right at Bath Road and then right at Addlestone Road.
Lane closures on Embleton Avenue in both directions at the intersection
Broun/Embleton intersection upgrade for Morley Station
Follow on-road signage

Benara Road between Della Road and Mahogany Road

6 February from 5am to mid-2023 (24 hour works)
Contraflow on Benara Road
No right turn onto Benara Road from Mahogany Drive
Reduced to one through lane in both directions
Speed reductions in both directions
Underpass construction works

Tonkin Highway between Hepburn Avenue and Dunreath Drive

Intermittent mobile works and lane closures in both directions
Line marking, water blasting and road sweeping

Great Eastern Highway between Epsom Avenue and Tonkin Highway

Ongoing to early-2023 (24 hour works)
Lane closures in both directions
U-turn on Great Eastern Highway after Lyall Street temporarily not permitted
Right turn into businesses and Ascot Apartments closed
New U-turn available for motorists travelling eastbound
Detour map
Road works and upgrades to the interchange

Broun Avenue between Embleton Avenue and Beechboro Road North

Ongoing, 6am to 3pm (excluding Sundays)
Lane closures and speed reductions in both directions
Visit TransPerth to stay up to date on bus route impacts
Broun Avenue realignment and bridge works

Tonkin Highway between Collier Road and Reid Highway

Ongoing - 24 hour works
Reduced to two through lanes in both directions
Additional dedicated lanes between interchanges and speed reductions
Rail-enabling works for Morley-Ellenbrook Line.
Learn more about why these changes are needed in the Super Stage Frequently Asked Questions (PDF).

Path impacts

View our Path Closure and Access Map to see what's happening in the project area, and how to navigate your way around the closures.

Tonkin Gap - Map PSP amp MRWA standards March 2023 — Click image to enlarge

Shared path between Addlestone Road and Broun Avenue

Closed
23 January to mid-2023
Detour
Construction works

Shared path on Great Eastern Highway between Davis Street and Ascot Apartments

Closed
13 March to mid-May 2023
Detour
Gantry Installation

Shared path between Acacia Ct and Benara Road

Closed
Ongoing to early-2023
Detour
Earthworks

Tonkin Highway and Broun Avenue travelling northbound

Closed
Detours via a temporary access off Tonkin Highway, along the top of the skate park/BMX track, over the side oval and then along the car park, back up to Broun Avenue
Detour

Tonkin Highway between Collier Road and Guildford Road

Closed
Ongoing
Follow signed detours to the western side of Tonkin Highway
Detour

Tonkin Highway between Parkview Parade and Victoria Street Footbridge

Closed
Ongoing to late-2023
Follow signed detours via Morrison Street
Detour

Guildford Road near Tonkin Highway

Closed
Ongoing until project completion
Follow signed detours to the northern side of Guildford Road
Detour

Guildford Road between the Tonkin Highway ramps

Closed
Ongoing
Path users diverted onto the road, follow signed detours
Detour

We are collaborating with local government, Department of Transport and WestCycle as part of the design process.

Project videos

Community

What’s that smell?

You may have noticed a strong smell in the project area. This smell is produced when new roads are built – in particular when the prime is sprayed on top of the base.

For Tonkin Gap, roads are being built for high volume traffic numbers known as Full Depth Asphalt (PDA) pavements. The process for PDA includes multiple steps and multiple layers.

Firstly, a base layer is applied, followed by a prime and then layers of asphalt.

Learn more in our Building a Road FAQs.

Noise and screen walls

A noise wall is a structure built between the road and a residential property. It improves amenity for surrounding residents by reflecting sound waves from the road, forcing sound to travel over and around the edges of the walls, thereby reducing the amount of noise that reaches nearby homes.

Screen walls protect residents’ privacy from passing traffic at the rear of their property only. We will consider screen walls in cases where the construction has reduced the existing level of privacy.

As part of this project, we expect to build noise or screen walls adjacent to most residential areas. The design and location of these will be finalised as part of the detailed design process. We have done noise modelling across the project area and noise mitigation would apply for areas that will be impacted by noise. We will ensure our noise mitigation meets the State Planning Policy 5.4 guidelines for acceptable noise levels.

If we need to construct noise or screen walls on property boundaries, the contractor will engage with individual property owners.

The team is still in early stages of design, but we are looking at options to reduce the noise from Redcliffe Bridge, which may include noise walls. We will continue to discuss options with the community while we work through this process.

Property Condition Surveys

If your property falls within the area that meets the criteria for a survey, you will receive a letter in the mail. If you believe your property has been damaged and you are not eligible for a property survey, please contact our team.

Dust and Vibration

You might feel vibrations and experience noise, but we will work with you to reduce noise impacts as much as possible – including considering the hours we work, type of equipment and machinery we use and noise walls. We have dust mitigation strategies to reduce the impact of dust on residents and businesses – including water carts, street sweepers and dust suppressants.

Road trains will continue to use Tonkin Highway. There are no current plans to revise the RAV access network arrangements.

Environment and heritage

Environment

This is a very constrained site and there is no way we can build the required infrastructure without clearing vegetation. However, we are committed to minimising the extent of clearing and are exploring opportunities for local and regional environmental offsets. Any clearing will also be undertaken with appropriate State and Federal government approvals.

Where an area of ground is disturbed and not finished with a sealed surface, such as asphalt, revegetation works will be undertaken. This will include a variety of native vegetation species, including trees.

Project approvals from environmental regulators including the Environmental Protection Authority of WA (EPA), Department of Water and Environment Regulation, Commonwealth Department of Agriculture, Water and the Environment has been obtained for the project. All relevant works approvals from appropriate agencies including Department of Biodiversity Conservation and Attraction, where the Swan River Trust is housed, Department of Water and Environmental Regulation for groundwater and contamination issues and local government authorities for out of hours approvals will be sought.

Flora and Fauna

Environmental consultants were engaged to complete a comprehensive Environmental Impact Assessment (EIA) for the Tonkin Gap Project, which included the Swan River and land within the road reserve on both sides of the Swan River within the alignment of Tonkin Highway.

The assessment included a detailed flora and vegetation assessment, a Black Cockatoo and fauna habitat assessment including inspection of mature trees to record habitat and breeding trees suitable for use by Black Cockatoo species, and a water insect, water and sediment survey of the Swan River. While potential Black Cockatoo nesting trees were identified during surveys, none with suitable hollows were found.

We would prefer not to have any impact on nesting cockatoos. We will be looking for all potential solutions to avoid this. Where we do need to remove such a tree, our Environment Team will inspect the trees prior to check if any cockatoos are nesting and relocate if necessary. We are consulting with community before vegetation within the project area is cleared.

The Tonkin Gap Project was referred to the WA Environmental Protection Authority (EPA) and the Commonwealth Department of Agriculture, Water and the Environment (DAWE) in 2019, and both the EPA and DAWE determined that the potential impacts of the project are not significant and does not require further assessment.

Park and foreshore changes

An area of Selby Park has always been reserved for a Tonkin Highway upgrade under the State Government’s Metropolitan Region Scheme (MRS). This will be required to build the new loop ramp from Great Eastern Highway. We are working closely with the City of Belmont to minimise the impact and determine how best to reinstate the park at the conclusion of the works.

We have identified an area under the Redcliffe Bridge, on the City of Bayswater side, that we could enhance. We are already working with the City of Bayswater and other State Government agencies to consider opportunities in this location. Suggestions from stakeholders and the community have included a skate park, fishing platforms and shared path facilities. Further consultation with local government, stakeholders and the community will be undertaken.

Heritage

We aim to avoid, minimise, and reduce our negative impacts to Aboriginal and European heritage sites wherever practicable, in line with Main Roads’ commitment to recognising heritage. A heritage trail will be constructed as part of the project and will predominately run from Great Eastern Highway to Guildford Road along the new Principal Shared Path.

Aboriginal heritage

For this project, we conducted heritage surveys and two sites of Aboriginal cultural significance were identified within the works area:

The Derbarl Yerrigan (Swan River)
Two River Gum trees each with a single cultural scar

The Derbarl Yerrigan is said to have been created by the Wagyl, a spiritual being often described as a serpent or snake, who still resides in river systems. It represents cultural continuity and is incorporated in many language groups oral histories.

Scar trees are the result of removing parts of the tree to make objects and artefacts, representing the traditional knowledge of the Whadjuk people. This provides an indication to the ancestral occupation and use of the area’s resources.

Scar Tree 1.jpg — Identified River Gum Tree with cultural scar

The input and contribution of Traditional Owners are valued, and we are seeking advice and opinions from Whadjuk Traditional Owners on this project.

For example, when disturbing any ground near, or in, the Derbarl Yerrigan we have employed Whadjuk Heritage Monitors. Their role is to observe ground disturbance as it is occurring to prevent possible harm to Aboriginal heritage.

We will also be incorporating Aboriginal urban design within areas of the project, including under the Redcliffe Bridge, Great Eastern Highway and Guildford Road underpasses.

European Heritage

European heritage searches of state and local heritage registers also revealed three sites of varying cultural and heritage value, within the vicinity of the Project, with one of these being within the Project boundary. The sites are:

Sugar’s Brickworks, Ascot
Brady Plaster Works, Bayswater
Cresco Fertiliser, Bayswater

The Sugar’s Brickworks site is located on the southern bank of the Swan River, underneath Redcliffe Bridge, and is currently recognised with a plaque that will remain in place throughout construction and operation. Brady Plaster Works site has been excluded from state registers due to lack of cultural significance, however prior to its demolition, TGA produced a standard archival record to be submitted to the Heritage Council of WA. Lastly, the Cresco site was a landmark in industrial development within the area, however, it is not included on state registers.

Sustainability

Have your say

As a key focus area for the project, we are asking our community to share their thoughts, ideas and suggestions as to how we can better embed sustainability into the project by completing our sustainability survey (PDF). Once completed, please email to enquiries@mainroads.wa.gov.au with the subject line ‘Tonkin Gap Sustainability’.

Download the Sustainability Survey (PDF)

What is Infrastructure Sustainability?

Infrastructure sustainability is infrastructure that is designed, constructed and operated to optimise environmental, social and economic outcomes of the long term.

To support our commitment to driving positive sustainable outcomes, we are applying the Infrastructure Sustainability Council (ISC) V2.0 Infrastructure Sustainability (IS) rating framework for the design and construction phases of this project to assess the project.

This is an industry-benchmarking tool that has been developed in consultation with the industry to embed sustainable practices in every aspect of infrastructure design, construction and operation. The process is evidence based and we will provide the full assessment to ISC at the end of each phase to be independent verified by a third party. Following this, the project will be awarded with a certification and rating which can be assessed against other major infrastructure projects across Australia.

Our Sustainability Commitment

Sustainability is a key focus for the project that we have considered during the design and construction phase of the project. We have developed a Tonkin Gap Project & Associated Works Sustainability Policy (PDF) to reflect our commitment to addressing sustainability issues including growth and economic benefit, efficient resource use, sustainable procurement, and community and stakeholder influence.

Annual Sustainability Report 2021-2022 (PDF)

Project Objectives and Targets

We have used the United Nations’ (UN) Sustainable Development Goals (SDG) to guide the consideration of key focus areas of sustainability for the project. An internal multi-disciplinary team has developed Sustainability Focus Areas (PDF) from key sustainability issues on the project. These focus areas help guide the identification of key risks and opportunities for the project.

From these objectives we have also identified sustainability targets (Word document) to ensure sustainability is front of mind during design, construction and operation. We will be monitoring our achievement as the project progresses.

Sustainable Development Goals

We measure and track our sustainability performance against the UN Sustainable Development Goals (SDG). The SDG are the blueprint to achieve a better and more sustainable future for all. They address the global challenges we face, including poverty, inequality, climate change, environmental degradation, peace and justice.

This information sheet (PDF) summarises what you need to know about how the project aligns with the global sustainability agenda. The goals are also linked to our project sustainability objectives (PDF).

Visit the UN SDG’s website for more information.

Background

Project Publications

Alleviate

pressure

Reduce

travel times

Improve

safety & connectivity

Tonkin Gap Project and Associated Works