UPDATE (3.07pm):
The site has now been cleared following a crash near Wentworth Falls on Tuesday.
The two-car accident occurred on the Great Western Highway near Valley Road about 1.35pm.
Eastbound traffic was affected for about 90 minutes following the incident.
However, traffic flow is now starting to return to normal.
Earlier:
Motorists on the Great Western Highway should expect delays following a crash on Tuesday afternoon.
The two-car accident occurred near Valley Road, outside Wentworth Falls, about 1.35pm.
One eastbound lane has been closed to traffic.
Emergency services personnel are at the scene.
Motorists are advised to exercise caution in the area.
It is the second major crash to occur on the Great Western Highway on Tuesday.
About 1.15pm, emergency services were called out to a car accident between Leura and Katoomba.