Work begins on Heathcote Road overtaking lane upgrade

Overview

Updated 2 hours ago

Heathcote Road climbs west out of the Woronora River valley with a single westbound lane for most of the grade. On 21 September 2026, contractor Ertech began adding 900 metres to the overtaking lane, creating a continuous 2.5-kilometre two-lane stretch for westbound traffic.

The A$180 million project is the first major capacity change on a corridor that carries more than 28,000 vehicles a day between southern Sydney, the Illawarra and the M5 and M7 motorways. Transport for NSW expects construction to take up to two years, with night closures and weekend detours along the way.

Why it matters

For 28,000 daily drivers, the upgrade adds a passing lane on the corridor's steepest climb, and two years of closures before it opens.

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Key Indicators

A$180m

Project cost

New South Wales government funding for the upgrade.

900 m

Overtaking lane extension

New westbound lane added between the Woronora River bridge and New Illawarra Road.

2.5 km

Continuous overtaking stretch

Combined length once the extension joins the existing lane at Lucas Heights.

28,000+

Daily vehicles

Motorists using Heathcote Road each day, according to the state government.

2 years

Expected construction period

Transport for NSW expects work to continue for up to two years.

Community submissions

Responses received during consultation on the environmental review.

~3 ha

Vegetation loss

Area of vegetation the environmental review expected the design to remove.

Voices

Curated perspectives — historical figures and your fellow readers.

People Involved

Jenny Aitchison

New South Wales Minister for Roads

In office

Organizations Involved

Transport for NSW

State transport agency

Delivering the project

The New South Wales agency responsible for planning, approving and delivering the Heathcote Road upgrade.

Ertech

Civil engineering contractor

Building the upgrade

The contractor awarded the construction contract for the Heathcote Road lane extension.

Timeline

2022 November 2026

8 events Latest: Today

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November 2026
Lane extension enters initial works phase
Today Construction

Crews install barriers, clear vegetation and relocate utilities; the lane is due within two years.
Today
October 2026
Initial night closure period ends
Traffic

Full overnight closures from 8pm to 5am on weeknights finish; day work continues.
October 23rd, 2026
September 2026
Construction starts on Heathcote Road
Construction

Work begins between Lucas Heights and Engadine, with night closures through 23 October.
September 21st, 2026
Ertech awarded construction contract
Procurement

Transport for NSW approves the project to proceed and names the builder.
September 2026
April 2025
Urgent slope realignment begins
Safety work

Ground movement after the 2022 landslips forces a 10-day closure for realignment.
April 2025
2025
Community consulted on environmental review
Consultation

Transport for NSW receives 26 submissions on impacts and mitigation.
2025
March 2023
Labor commits to the upgrade before state election
Policy

The party promises the A$180 million project during the New South Wales election campaign.
March 2023
2022
Landslips close Heathcote Road
Weather damage

Extreme rainfall triggers two landslips. Emergency repairs follow later in 2022.
2022

Scenarios

Extended overtaking lane opens to westbound traffic by end-2028

Likely Resolves by End of 2028

Discussed by: Transport for NSW and contractor Ertech

Construction proceeds through rock excavation, pavement work and fauna fencing, and the new lane opens within the two-year window. The continuous 2.5-kilometre westbound stretch then carries traffic between the Woronora River bridge and Lucas Heights.

Construction slips past 2028 as rock work and closures accumulate

Possible Resolves by End of 2028

Discussed by: Region Illawarra, citing the project's environmental review

The review flagged rock-face blasting, intermittent full closures and about 15 full weekend shutdowns. If those activities run long or weather interrupts the program, the completion date moves beyond the stated two years.

Transport widens the eastbound side as well

Unlikely Resolves by Q2 2029

Discussed by: Transport for NSW environmental review

The review considered widening the eastbound lane but rejected it as likely to cause substantial environmental impacts, geotechnical risk and poor value. A later decision to fund eastbound widening would reverse that finding.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

2022

Heathcote Road landslips (2022)

Extreme rainfall caused two landslips on Heathcote Road. Emergency repairs were completed later that year, but the ground kept moving and the slope was still considered a safety risk.

Then

A 10-day closure was required in April 2025 for urgent slope realignment.

Now

The corridor's steep, unstable terrain remains a constraint on how quickly any road work can proceed.

Why this matters now

The same terrain that caused the landslips shapes this project, including rock excavation and repeated traffic closures.

March 2023

New South Wales election commitment (2023)

Labor promised the A$180 million Heathcote Road upgrade before the March 2023 state election. The project then moved through environmental review and procurement.

Then

Transport for NSW consulted the community in late 2025 and awarded the contract to Ertech.

Now

Construction began in September 2026, more than three years after the promise.

Why this matters now

It explains the gap between the political announcement and the first barriers going up on the roadside.