Tonkin Gap Project

What's Happening

Get the latest project news in the December Construction Update

Last month we continued activity on the Redcliffe underbridge activation works on the southern side of the river, including rebuilding the path that runs from east to west. We also continued laying the final layer of asphalt for the project and continued the final upgrades on Great Eastern Highway.
Read the December update for what’s coming up.

Asphalt upgrade

This month you will see lanes on Tonkin Highway between Collier Road and Dunreath Drive open to full capacity. The 80km/h will remain until early-2024 as we apply the remainder of open grade asphalt and complete finishing works.

Great Eastern Highway to be reinstated to full capacity

It’s been busy on Great Eastern Highway with various traffic realignments, lane reductions and changes to how you enter and exit Tonkin Highway. In December, we plan to open all lanes on Great Eastern Highway, reinstate the right turn from Tonkin Highway northbound to Great Eastern Highway and rebuild and reinstate the u-turn near Ascot Apartments to head back towards Perth City.

Principal Shared Path to open this month and feature heritage trail

Later this month the Principal Shared Path (PSP) adjacent to Tonkin Highway northbound between Stanton Road and Collier Road will open. In consultation with Traditional Owners we are installing a heritage trail along the new PSP so please make sure you stop and read the signs.

Taking a construction break during the holidays

We will be pausing construction from 5pm 21 December to 7am 2 January for a holiday break. During the break the Main Roads Customer Information Centre will still be available for urgent enquiries – 138 138.

Upcoming disruptions on Tonkin Highway

1.Tonkin Highway southbound closed between Guildford Road and Great Eastern Highway - 8pm Friday 1 December to 3am Monday 4 December

Tonkin Highway southbound collector-distributor (CD) lane and ramps to Great Eastern Highway and from Guildford Road will be closed to allow us to complete the final layer of asphalt.

During this weekend, you will not be able to enter Tonkin Highway southbound from Guildford Road or exit onto Great Eastern Highway. Southbound traffic on the main Tonkin Highway carriageway will not be impacted.

TGA - 1 Dec to 4 Dec - Tonkin southbound between Guildford Road and Great Eastern Highway — Click for detour map

2. Tonkin Highway northbound between Great Eastern Highway and Guildford Road - 9pm Friday 8 December to 4am Monday 11 December

Tonkin Highway northbound collector-distributor (CD) lane and ramps to Guildford Road and from Great Eastern Highway will be closed to allow us to apply the final layer of asphalt on the northbound CD lane.

We may need to continue works on the weekend of 15 to 18 December. Check our roadworks page for updates.

During the December 8-11 closure, you will not be able to enter Tonkin Highway northbound from Great Eastern Highway or exit onto Guildford Road. Northbound traffic on the main Tonkin Highway carriageway will not be impacted.

We apologise for any inconvenience.

TGA - 8 Dec to 11 Dec - Tonkin northbound between Great Eastern Highway and Guildford Road — Click for detour map

Background

Roadworks

Guildford Road between Tonkin Highway ramps

Ongoing until 2 December (Monday to Thursday) 7pm to 6am
1 December 7pm to 8am
Lane closures
Kerbing, brick paving and line marking

Embleton Avenue southbound between Broun Avenue and Wotton Street

7am 27 November to 5pm 21 December (24/7)
Lane closure
Services works, kerbing and asphalting

Tonkin Highway southbound between Guildford Road and Great Eastern Highway

8pm 1 December until 3am 4 December (24/7)
Tonkin Highway southbound on-ramp from Guildford Road closed
Tonkin Highway southbound off-ramp to Great Eastern Highway closed
Tonkin Highway southbound collector-distributor lane between Guildford Road and Great Eastern Highway closed
No impacts to Tonkin Highway southbound main carriageway
Detour map
Open grade asphalt works

Tonkin Highway northbound on-ramp from Great Eastern Highway eastbound

4 December 9pm to 5am
Ramp closed
Detour map
Kerbing works

Tonkin Highway northbound between Great Eastern Highway and Redcliffe Bridge

4 December 9pm to 5am
Lane closure
Kerbing works

Great Eastern Highway eastbound between Moreing Street and Tonkin Highway

4 December 9pm to 5am
Lane closure
Kerbing works

Tonkin Highway southbound between Great Eastern Highway and Dunreath Drive

4 December 7pm to 8am
Lane closure
Traffic barrier removal

Tonkin Highway northbound on-ramp from Guildford Road

4 December 8pm to 5am
Ramp closed
Detour map
Barrier works, signage installation, rock pitching

Tonkin Highway northbound between Guildford Road and Collier Road

4 December 8pm to 5am
Lane closure
Barrier works, signage installation, rock pitching

Great Eastern Highway between Moreing Street and Boulder Avenue

5 to 7 December 8pm to 5am
Lane closures
Road realignment, electrical works, signal works and line marking

Tonkin Highway southbound on-ramps from Great Eastern Highway

5 December 8pm to 5am
Ramps closed
Detour map
Road realignment, electrical works, signal works and line marking

Tonkin Highway southbound off-ramp to Great Eastern Highway

5 December 8pm to 5am
Ramp closed
Detour map
Road realignment, electrical works, signal works and line marking

Tonkin Highway southbound between Guildford Road and Redcliffe Bridge

5 December 7pm to 5am
Lane closures
Asphalting, kerbing, and barrier removal

Tonkin Highway southbound between Dunstone Road and Redcliffe Bridge

6 and 7 December 7pm to 5am
Lane closures
Asphalting, kerbing, and barrier removal

Great Eastern Highway westbound between Moreing Street and Boulder Avenue

6 and 7 December 10pm to 5am
Full closure
Detour map
Road realignment, electrical works, signal works and line marking

Tonkin Highway northbound between Dunreath Drive and Stanton Road

6 and 7 December 8pm to 5am
15 December 8pm to 7am
16 December 7pm to 8am
Lane closure
Wire rope barrier installation

Great Eastern Highway over Tonkin Highway

7 and 8 December 8pm to 5am
Lane closures in both directions
Kerbing works

Tonkin Highway northbound between Great Eastern Highway and Guildford Road

9pm 8 December until 4am 11 December (24/7)
Tonkin Highway northbound on-ramp from Great Eastern Highway closed
Tonkin Highway northbound off-ramp to Guildford Road closed
Tonkin Highway northbound collector-distributor lane between Great Eastern Highway and Guildford Road closed
No impacts to Tonkin Highway northbound main carriageway
Detour map
Open Grade Asphalt works

Long term road impacts

Broun Avenue eastbound between Bath Road and Embleton Avenue intersection

27 June 5am - Late 2023
Broun Avenue eastbound reduced to one lane,
Right turn and left turn from Broun Avenue eastbound to Embleton Avenue closed.
Detour via Bath Road and Addlestone Road

Broun Avenue westbound at Broun Avenue and Embleton Avenue intersection

27 June 5am - Late 2023
Right turn from Broun Avenue westbound to Addlestone Road.
Detour via Bath Road and Addlestone Road.

Great Eastern Highway in both directions between Lyall Steet and Boulder Avenue

2 July to late 2023 (24 hour works)
Reduced to two lanes
Speed reductions
Median and road realignment 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 late-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
U-turn available for motorists travelling eastbound
Detour map
Road works and upgrades to the interchange

Path closures and access impacts

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.

Vibration Fact SheetFile size: 0.68MB

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.

Project Publications

See more projects news »

Tonkin Gap team takes gold for sustainability

Alleviate

pressure

Reduce

travel times

Improve

safety & connectivity