Night closures on the M1 Princes Motorway and Picton Road

Traffic Alert from Transport for NSW, 17 March 2026

Motorists are advised of upcoming night closures of the M1 Princes Motorway and Picton Road for routine maintenance work and for work to be carried out on the Mount Ousley interchange. 

Closures will be in place from Sunday 22 March until Wednesday 1 April 2026 on Sunday, Monday and Wednesday nights, weather permitting.

Work will include vegetation maintenance, installing and removing signage, barriers and guardrail, relocating and installing utilities, installing temporary street lighting, drainage, and construction activities including excavating material and earthworks, removing part of the existing median island, noise wall removal, installing temporary and permanent road kerbing, paving and linemarking, and delivery of oversized equipment.

The closures will be in place on the M1 Princes Motorway between Bulli Tops and Memorial Drive, and Picton Road between the M1 Princes Motorway and Almond Street at Wilton. The roads will be closed in both directions and detours will be in place each night between 8pm and 4am. Picton Road eastbound will be closed from 7.30pm to 4am to ensure the M1 Princes Motorway is clear by 8pm.

Motorists travelling between Wollongong and Bulli Tops will be detoured via Memorial Drive and Bulli Pass and should allow up to 15 minutes additional travel time. 

Motorists travelling between Wollongong and the Hume Motorway will be detoured via Memorial Drive, Bulli Pass and Appin Road, and should allow up to 40 minutes additional travel time. Light vehicles can also use Wilton Road (Broughton Pass) between Appin Road and Picton Road or the Illawarra Highway (Macquarie Pass).

Local access to Mount Ousley Road between the Princes Highway and Gowan Brae Avenue will be maintained. 

Heavy vehicles over 19 metres long and over 50.5 tonnes will not be able to access Bulli Pass and are advised to delay their journey.

Heavy vehicles over 19 metres or more than 50.5 tonnes will be given a window of access from 12am (midnight) during the full closures on Monday 23, Wednesday 25, Monday 30 March and Wednesday 1 April.

Motorists are advised to drive to the conditions and follow the directions of signs and traffic control.

For more information visit www.livetraffic.com/incident-details/266141 or download the Live Traffic NSW app.  

The community will be notified if the closures need to be rescheduled due to weather. 

Transport for NSW thanks the community for its patience while work is carried out.