Improvements between Picton Road & Bulli Tops

As part of improvements to safety, capacity and travel times, the Australian and NSW Governments are jointly funding an upgrade to the M1 Princes Motorway between Bulli Tops and Picton Road, with $84 million allocated to Stage One, Picton Road to Bellambi Creek.


Roads and Maritime has developed a preferred option for Stage 1 to improve safety and efficiency on the motorway. Stage 1 involves widening and realigning the motorway to provide a six lane divided road between the Picton Road interchange and Bellambi Creek.

A Review of Environmental Factors for Stage 1 went on public display in December 2016 and closed on 3 February 2017.

We have carefully reviewed all community feedback and developed a Submissions Report to summarise all submissions received during the display period and address each issue.

The submissions report is available on the project documents page.

Roads and Maritime would like to thank members of the community for providing their feedback to the project team.

The project

The M1 Princes Motorway between Picton Road and Bulli Tops is currently two lanes in each direction.

This section of road carries about 37,000 vehicles a day, 13 per cent of which are heavy vehicles. Traffic numbers will continue to increase along this route.

Due to the steepness of the road and the tight turns, heavy vehicles travel slowly, which can lead to a large difference in speeds between light and heavy vehicles.

The project would provide additional lanes in both directions and improve the curves. This would increase the safety, capacity and efficiency of the M1 Princes Motorway.

Flyover video

Stage One

The first stage of the project will provide an additional lane in each direction between Picton Road and Bellambi Creek.

The tight curves on the existing M1 north of Picton Road and south of Bellambi Creek will be improved to increase safety and efficiency.

Stage Two

The second stage of the project will link directly into stage one and will provide an additional lane in each direction between Bellambi Creek and Bulli Tops.

The planning and design for stage two will be carried out with stage one. Timing of construction of stage two is yet to be confirmed.

Project benefits

This stretch of road has gradients of between 8-10 per cent and a high proportion of traffic (13 per cent) is heavy vehicles. It is expected that heavy vehicle traffic will continue to grow.

The project will provide for a separation of high speed traffic from slow moving heavy vehicles and aims to improve both safety and traffic efficiency.

The project will improve traffic flow for the 37,000 vehicles per day that travel on this section of the M1 Princes Motorway. It will also improve freight efficiency, connectivity and productivity within the Wollongong and Illawarra region, particularly between Port Kembla and key regional industries.

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