Motorists are advised of upcoming traffic changes from next month on the Princes Highway at Bulli Pass and Mount Ousley Road.

The Princes Highway at Bulli Pass will be closed for three days for maintenance work between Lawrence Hargrave Drive and M1 Princes Motorway.

The road will be closed in both directions between 9am and 3pm on Tuesday 1, Wednesday 2 and Thursday 3 August, weather permitting.

Work includes trimming vegetation, clearing gutters and drains, line marking, bridge inspections and maintenance of guardrails, signs and safety ramps. 

Detours will be in place via Lawrence Hargrave Drive or the M1 Princes Motorway and Memorial Drive.

Residents within the closure area will have access to their properties at all times under the guidance of traffic controllers from Lawrence Hargrave Drive only. 

In addition, changed traffic conditions will be in place on Mount Ousley Road and the Princes Highway at Bulli Pass from Tuesday 1 August for up to eight weeks, as maintenance work continues, weather permitting.

Single lane closures, traffic control and a reduced speed limit of 40 km/h will be in place between 7pm to 7am, Sunday to Friday on Mount Ousley Road. 

Shoulder closures, traffic control and a reduced speed limit of 40 km/h will be in place on Bulli Pass for about 250 metres, for the duration of the bridge work.

Motorists should plan their journey and allow up to 15 minutes additional travel time.

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

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