Milestone reached on $60m Pacific Hwy - Harrington Rd intersection upgrade

A minor change has been announced to the design of the Pacific Highway – Harrington Road Intersection Upgrade at Coopernook in New South Wales, taking the project a step closer to construction. 

$60 million has been invested by the Australian and New South Wales Governments to build an interchange that will connect Harrington and Coopernook roads, with an overpass over the Pacific Highway. 

Transport for NSW will continue to work on this project, which is designed to improve safety for road users, improve traffic flow for motorists and freight as well as enhance connectivity and accessibility for and between communities. 

A minor change has been made to the intersection arrangements during the detailed design phase, with T-intersections identified as the preferred design over a single lane roundabout. 

This option will be less complex to design and build, and it is expected to reduce the duration of construction. 

The minor design change will not delay the start of works and will continue to meet the project objectives while also meeting the safeguard requirements of the Review of Environmental Factors that was published late last year. 

Residents or stakeholders can provide feedback on the proposed change to the intersections by emailing Coopernook2Harrington@transport.nsw.gov.au by 7 October 2025. 

Project map (source: Transport for NSW)

Key features of the new interchange include: 

• An interchange with a bridge over the Pacific Highway 

• A link road with a single lane in each direction connecting Coopernook Road and Harrington Road 

• A connection with Coopernook Road via a T-intersection 

• A connection with Harrington Road via a T-intersection 

• Raising Coopernook Road between the Pacific Highway and the T-intersection to maintain current flood immunity 

• Adjustments to the Pacific Highway median to remove right turning lanes, install wire rope and concrete barriers 

• Utilising existing left-in/left-out connections to enter and exit the Pacific Highway 

• A shared user path across the bridge 

• Acceleration and deceleration lanes on the Pacific Highway to ensure safe entry and exit to and from the highway 

Source: Transport for NSW (1, 2); Roads & Infrastructure Australia