Motorists are advised of a night closure in place on the M1 Princes Motorway and Picton Road, with detours in place, this weekend.

The M1 Princes Motorway will be closed between Bulli Tops and Memorial Drive, and Picton Road will be closed in both directions between the M1 Princes Motorway and Almond Street at Wilton between 8pm Sunday 11 September and 4am Monday 12 September, weather permitting.

Picton Road eastbound will be closed earlier on Sunday from 7.30pm to ensure the M1 Princes Motorway is clear by 8pm.

Work will include vegetation removal, guardrail repairs, line marking and cleaning drains to improve safety for motorists.

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 Motratorway 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.

Motorists travelling to the Hume Motorway can also detour via the Illawarra Highway (Macquarie Pass).

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

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

For the latest traffic updates call 132 701, visit livetraffic.com or download the Live Traffic NSW App.