
The “game-changing” Mamre Road works start (between the M4 Motorway at St Clair and Erskine Park Road, Erskine Park, in western Sydney).
Transport for NSW (TfNSW) has awarded Seymour Whyte a construction contract to upgrade a section of Western Sydney’s Mamre Road, known as the Mamre Road Upgrade Stage 1 project.
The project, a critical component of the Western Sydney Priority Growth Area initiative, aims to reduce congestion, improve safety and travel times and support future economic and residential growth.
The project involves upgrading a 3.8km section of Mamre Road between the M4 Motorway at St Clair and Erskine Park Road in Erskine Park from a two-lane unseparated road to a four-lane road separated by a large central median to accommodate an additional two (2) lanes in the future if traffic demand justifies.
Key features of this upgrade include:
- an upgrade to 3.8 kilometres of Mamre Road between the M4 Motorway, St Clair and Erskine Park Road, Erskine Park to a four-lane divided road with a wide central median, allowing for six lanes in the future if required
- changes to intersections with Mamre Road, including:
- an upgrade to the existing signalised intersection at Banks Drive, including a new western stub for access and a U-turn facility
- a new signalised intersection at Solander Drive with a new western stud for access and a U-turn facility
- a new signalised intersection at Luddenham Road with new turning lanes
- an upgrade to the existing signalised intersection at Erskine Park Road with new turning lanes
- modified intersection arrangements (left in, left out only) at McIntyre Avenue and Mandalong Close, St Clair
- a new shared path along the eastern side of Mamre Road, with provision for a future shared path on the western side
- reinstatement of bus stops near Banks Drive with provision for additional bus infrastructure in the future
- changes to property access at Mamre House, Erskine Park Rural Fire Service and other private properties
- drainage and flooding infrastructure upgrades
- new traffic signals and relocation of existing electronic signage
- new roadside furniture and street lighting
- noise walls along the eastern side of Mamre Road, St Clair.
Commitment to environmental sustainability
Seymour Whyte is committed to incorporating environmental sustainability initiatives into the project, including:
- reducing excess material removal by approximately 45,000 tons and minimising the importation of material from external quarries by the same volume
- using reclaimed asphalt pavement and site-won excavated materials to promote circular economy principles
- reusing traffic control hardware, such as concrete barriers and solar-powered street lighting, from Seymour Whyte’s recently completed motorway projects: the new M12 Motorway, Western Sydney Airport and Sydney Gateway at Mascot
- using renewable energy sources for lighting
- re-use of cleared vegetation
- encouraging active transport through its new shared path.
Social impact
The project, scheduled for completion in 2028, is also dedicated to fostering social inclusion. It aims to allocate at least 1.5% of the contract value towards capability and capacity building for First Nations People and businesses.
John Kirkwood, Seymour Whyte Chief Executive Officer expressed his enthusiasm for the project, stating, “This contract is another great opportunity for Seymour Whyte to play a pivotal role in the social development of Western Sydney. We are very proud to support the region’s growth and economic prosperity.”
“Western Sydney is experiencing dramatic growth; and Mamre Road is a key transport corridor in the Western Parkland City and important connector the Western Sydney Employment Area and Western Sydney Aerotropolis.”
“Thus, it is essential that the construction is delivered with minimal impact to local businesses and the community, the environment and utilities; all while engaging with local people for goods and services to generate meaningful and inclusive local industry participation.”
In Western Sydney, Seymour Whyte is already delivering the M12 Motorway (Central package) and the landside civil package for the new Western Sydney International Airport at Badgerys Creek, and this first part of the Mamre Road upgrade continues that strong track record in the local area.



