The long-running and disruptive Warringah Freeway upgrade is set for completion within weeks, bringing to an end almost five years of roadworks and lane changes on one of Australia's busiest motorways.
The final changes will convert a reversible lane on the freeway between Lavender Street and Ernest Street into a permanent northbound lane, followed about a week later by the opening of a new northbound on-ramp from High Street. The 96-metre on-ramp will provide a link from North Sydney, Kirribilli and Neutral Bay to the freeway.
The upgrade was necessitated by the construction of the $7.4 billion Western Harbour Tunnel, which will allow motorists to bypass the Sydney CBD when it opens in late 2028. The 6.5-kilometre tunnels will link the WestConnex motorway under the inner west to the Warringah Freeway to the north.
Aitchison said the finish line was finally in sight for the complex freeway upgrade. “Five years, 300 switches, and we’re now down to the last two. It’s been very difficult to get done, and we really appreciate the patience of people through this disruption,” she said. She noted the project had been probably one of the most challenging since her government came to power.
Budget papers show $2.346 billion had been spent on the upgrade up to June this year, with a further $18 million allocated for the new financial year. This is up from a total estimated cost of $2 billion in last year’s budget, though Aitchison said final costings had yet to be confirmed due to scope changes, including the addition of the High Street on-ramp, which was initially part of the tunnel project and is opening about 18 months early.
The upgrade introduces a channelised traffic system on the freeway, requiring southbound motorists after Miller Street in Cammeray to choose lanes for the Harbour Bridge or the Harbour Tunnel. Aitchison said the channelised work would smooth traffic flows and reduce the risk of crashes caused by motorists weaving. Workers have clocked up 10 million hours on the project, laying more than 74,000 tonnes of asphalt and pouring more than 165,000 cubic metres of concrete.
Transport for NSW project director Tony Sheppard described the final two changes as the “icing on the cake”, saying they would simplify the freeway. He said including the High Street on-ramp in the upgrade de-risks the opening of the Western Harbour Tunnel. “It means that when there’s a slight bingle, the traffic isn’t stuffed for two hours,” he said. Landscaping and finishing works will continue into early next year. The upgrade has created a dedicated southbound bus lane and about 2.5 kilometres of new and upgraded pedestrian and cycling paths.
Analysis
Why This Matters
- The completion ends five years of major traffic disruption for the 400,000 people who use this key corridor daily.
- The upgrade is a critical final link connecting the WestConnex motorway to the under-construction Western Harbour Tunnel, a core piece of Sydney's road infrastructure overhaul.
- The introduction of channelised traffic flow is expected to significantly improve safety and reduce congestion in a notorious bottleneck zone.
Background
The Warringah Freeway upgrade was driven by the $7.4 billion Western Harbour Tunnel project, which will provide an alternative route to the Sydney Harbour Bridge when it opens in late 2028. Construction on the four-kilometre upgrade involved rebuilding the freeway while maintaining traffic flows of up to 220,000 vehicles a day, making it one of the most complex road projects in NSW history. The final cost, currently over $2.36 billion, is yet to be confirmed.
What to Watch
- The specific dates in early December for the opening of the permanent northbound lane and the new High Street on-ramp.
- The final cost of the project, which the government has yet to announce due to scope changes.
- The progress of the Western Harbour Tunnel, whose success depends on this freeway configuration being ready.
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12 claims in this story checked against 1 source: 12 supported.
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- SupportedThe Warringah Freeway upgrade is set to finish within weeks, ending almost five years of disruption.Sydney Morning Herald - Latest News: “A multibillion-dollar upgrade to one of Australia’s busiest motorways will be completed within weeks, ending almost five years of disruption for residents along the corridor and motorists who have had to navigate repeated changes to lanes during construction.”
- SupportedThe final two traffic changes will simplify the route for 400,000 daily users.Sydney Morning Herald - Latest News: ““These final two changes will make a real difference for the 400,000 people who use this key corridor daily, simplifying the way traffic moves through the freeway and making journeys safer, smoother and more reliable.””
- SupportedAitchison said: “Five years, 300 switches, and we’re now down to the last two. It’s been very difficult to get done, and we really appreciate the patience of people through this disruption,”Sydney Morning Herald - Latest News: ““Five years, 300 switches, and we’re now down to the last two. It’s been very difficult to get done, and we really appreciate the patience of people through this disruption,” she said.”
- SupportedSheppard described the final two changes as the “icing on the cake”.Sydney Morning Herald - Latest News: “Sheppard said the project had been “extremely complex” and the final two traffic changes, which will simplify the freeway, were the “icing on the cake”.”
- SupportedSheppard said: “It means that when there’s a slight bingle, the traffic isn’t stuffed for two hours,”Sydney Morning Herald - Latest News: ““It means that when there’s a slight bingle, the traffic isn’t stuffed for two hours,” he said.”
- SupportedThe reversible lane between Lavender Street and Ernest Street will become permanently northbound by early December, followed about a week later by the new High Street on-ramp opening.Sydney Morning Herald - Latest News: “A reversible lane on the freeway between Lavender Street and Ernest Street will become a permanent northbound lane by early December, followed about a week later by the opening of a new northbound on-ramp from High Street.”
- SupportedThe new High Street on-ramp is 96 metres long and links North Sydney, Kirribilli and Neutral Bay to the freeway.Sydney Morning Herald - Latest News: “the opening of the 96-metre on-ramp from High Street, which will provide a link from North Sydney, Kirribilli and Neutral Bay to the freeway.”
- SupportedThe upgrade was necessitated by the $7.4 billion Western Harbour Tunnel, which is due to open in late 2028 and will allow motorists to bypass the CBD.Sydney Morning Herald - Latest News: “The upgrade was necessitated by construction of the $7.4 billion Western Harbour Tunnel , which will allow motorists to bypass the CBD when it opens in late 2028.”
- SupportedThe 6.5-kilometre tunnels will link WestConnex under the inner west to the Warringah Freeway in the north.Sydney Morning Herald - Latest News: “The 6.5-kilometre tunnels will link the WestConnex motorway under the inner west to the Warringah Freeway in the north.”
- SupportedBudget papers show $2.346 billion had been spent on the upgrade up to June this year, with another $18 million allocated for the new financial year.Sydney Morning Herald - Latest News: “Budget papers show $2.346 billion had been spent on the Warringah Freeway upgrade up until June this year, while a further $18 million was allocated for the new financial year.”
- SupportedThe spending is up from a total estimated cost of $2 billion in last year’s budget; Aitchison said final costings remain unconfirmed because of scope changes.Sydney Morning Herald - Latest News: “That is up from a total estimated cost of $2 billion in last year’s budget. Aitchison said the final costings had yet to be confirmed due to the scope changes.”
- SupportedThe channelised system will require southbound motorists after Miller Street to choose lanes for the Harbour Bridge or Harbour Tunnel, and Aitchison said it would smooth traffic flows and reduce crash risk from weaving.Sydney Morning Herald - Latest News: “After passing Miller Street in Cammeray, southbound motorists will need to take lanes on the left for the Harbour Bridge, or right lanes for the Harbour Tunnel. Aitchison said the new “channelised” work on the freeway would smooth traffic flows and reduce the risk of crashes caused by motorists weaving between lanes.”