NSW Ambulances attended a crash on the New England Highway at Moonbi, north of Tamworth, at 7am on Tuesday morning, responding to calls of a single car crash near Mount View Road.
An ambulance media spokesperson said a woman in her 50s with "no obvious injuries" was the sole occupant in the car that rolled off the road, landing on its side.
Emergency workers extracted her from her car and took her to Tamworth hospital.
Earlier reports from NSW Transport Management Centre said two cars were involved.
EARLIER
Traffic is being slowed on the New England Highway following a car crash.
The accident happened at the highway at Moonbi, north of Tamworth, near Mount View Road on Tuesday, November 21.
Alternating (stop/slow) traffic conditions are in place to allow motorists to pass in one direction at a time, as emergency services remain at the scene.
Motorists are advised to consider delaying their trip or allow plenty of extra time.
There is no word on injuries at this time.
It's the second crash at the location in two days.
It comes after the highway was closed for most of Monday, November 20, after two cars collided near Mount View Road, injuring three people.
Also on Monday, a crash involving a car and trailer brought part of the Hume Highway to a standstill at Gundagai.
The accident, which occurred on the Sheahan Bridge, closed the southbound lanes of the dual carriageway late in the afternoon.
A spokesperson for NSW Police confirmed they were called out to a car towing a trailer having jack-knifed on the bridge just before 5.30pm.
No one is believed to have been injured in the incident.
The scene was cleared and the highway reopened by 6.15pm.
For the latest traffic information, visit www.livetraffic.com or download the Live Traffic NSW app.
