Truck drivers should expect delays of up to five minutes as work continues to repair the road surface on the Hume Highway southbound at Marulan.
Work will be carried out for three weeks from Sunday, February 2, between the hours of 7pm and 6am, Sunday to Thursday nights.
Concrete slabs will be replaced on the southbound lanes from just south of Medway Road for about 1.4 kilometres, Transport for NSW advises.
Single lane closures and a reduced speed limit of 40km/h will be in place for the safety of workers and road users.
Outside of work hours, a reduced speed limit of 80 km/h and single lane closures will be in place until the project is complete.
For more information visit livetraffic.com/incident-details/220784, or download the Live Traffic NSW app.