The site has now been cleared following a car accident near Blaxland.
The single-vehicle accident occurred on the Great Western Highway at about 11am on Thursday morning.
Westbound motorists were delayed for some time following the incident.
Traffic flow is now returning to normal.
There are heavy traffic conditions near Blaxland following a car accident on Thursday morning.
The single-vehicle accident occurred on the Great Western Highway, approaching Layton Avenue, at about 11am.
Westbound motorists should expect delays and reduce speed in the area.
Emergency services personnel are at the scene.
It is the third accident to occur on the Great Western Highway this week.
There were traffic delays on the highway near Bullaburra following a multi-vehicle accident on Tuesday.
On the same day, a truck and car collided on the highway at Hazelbrook.