The Great Western Highway has reopened after a crash that killed four people, and left a man with critical injuries.
The highway reopened in both directions around 12.45am (AEDT) on Sunday, the Transport Management Centre said.
All lanes of the highway had been closed between Bathurst and Lithgow after the crash at Glanmire, east of Bathurst, around 1.40pm on Saturday.
"A lengthy recovery operation has been completed and all diversions have been lifted," a spokeswoman said.
It was reported that the horrific crash - involving a car, a ute and a semi trailer - occurred after one of the vehicles swerved to miss a dog that had run onto the road.
Three people in the car were killed instantly, while a passenger in the ute also died at the scene.
The ute driver was trapped for an hour and half before being airlifted to Westmead Hospital with life threatening injuries.