A teenage girl has died following a horrific two-vehicle crash on the NSW mid-north coast.

Abbey Stephen, 19, was driving her Mazda 2 in the rural town of Old Bar, near Taree, when she was hit by a Ford Falcon that crossed the wrong side of the road at 7.20pm on Tuesday.

Due to the impact of the crash, the 40-year-old driver of the Ford was ejected from her vehicle, while Ms Stephen remained trapped for some time after her car flipped.

The teen was released from the wreckage by rescue officers and airlifted to John Hunter Hospital in a critical condition but later died.

Police are now investigating whether the older woman was under the influence of drugs or alcohol at the time of the incident after witnesses came forward about an earlier bingle at a Coles car park.

Police have said the 40-year-old woman was driving her blue Ford in the supermarket car park on the same street at Old Bar Road when it hit a pole.

After being thrown from her car in the collision, she was airlifted to John Hunter Hospital with hip, ankle and rib injuries and remains in a stable condition.

Ms Stephen’s boyfriend, Mick, and sisters, Trisha and Jessica, have posted photo tributes on their Facebook pages to remember the “gorgeous woman”.

“So sorry to hear of this tragedy Mick. You’ve been in my thoughts all day. Sending you all the strength and love at this tough time,” one friend wrote on Mick’s post yesterday.

Another commented: “Thinking of you Mick and Abbey’s family.”

Ms Stephen’s sister, Trisha, posted a photo of the pair with the caption: “Ohana means family. Family means nobody gets left behind or forgotten.”

“Beautiful photo Trish. I’m sorry for your loss, Abbey was a gorgeous woman,” a friend posted.

“My heart breaks for you and your family Trish. Sending you strength and love to you all during this difficult time,” another friend wrote.

“My heart, my soul, my baby girl” posted sister Jessica on Facebook with a photo.

A friend said: “So sorry to hear about your loss of your little sister. Our love and prayers are with your family.”

Today, Australian police forces are conducting Operation Rolling Thunder, which is the country's largest-ever heavy vehicle compliance operation.

"We have started 2018 not in a great way with the carnage on our roads continuing already," NSW Police deputy commissioner Catherine Burn said at a press conference on road toll this morning.

"People are dying senselessly and needlessly on our roads."

Investigations into the incidents are continuing.  

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