The site has now been cleared following a crash in Cabramatta.
The bus and car accident occurred on the Hume Highway at Longfield Street about 9.35am on Wednesday.
RMS personnel have worked to clear up the site.
Traffic congestion is starting to ease.
There are traffic delays in Cabramatta following a crash on Wednesday morning.
The accident, between a bus and car, occurred on the Hume Highway at Longfield Street about 9.35am.
One westbound lane is closed to traffic.
RMS personnel are at the scene.
Motorists are urged to exercise caution and reduce speed in the area.