A two-truck crash has closed one northbound lane on the Hume Highway at Sutton Forest.
The crash happened just after 3.20pm on Thursday afternoon.
Fire and Rescue crews, ambulance crews and police attended the scene.
Two people were assessed by paramedics, however neither had injuries.
According to Live Traffic NSW, northbound motorists are queued for around three kilometres.
Southbound traffic is also heavy.
Motorists are advised to exercise caution and allow extra travel time.