A mother has spoken of the moment her teenage daughter told her she wouldn’t be home late in the last text she ever sent to her before being killed in a horrific car crash.

Alyssa Postle, 17, suffered serious head injuries when the car she was a passenger in veered off the road and into a power pole in Bray Park in Brisbane‘s north in August last year.

The Year 12 student had texted her mother Kellie: ‘Should be home by 8.30, XX’ but just one hour later Ms Postle had two teenagers at her door telling her there had been an accident.

‘I think I fell to my knees,’ the heartbroken mother told the Courier Mail.

Alyssa Postle, 17, suffered serious head injuries when the car she was a passenger in veered off the road and into a power pole in Bray Park in Brisbane's north in August last year

Alyssa Postle, 17, suffered serious head injuries when the car she was a passenger in veered off the road and into a power pole in Bray Park in Brisbane’s north in August last year

Alyssa spent three days in hospital before her family had to make the unbearable decision to turn off her life support.

She and her friends are believed to have been driving to KFC at the time of the crash.

In the nine months since her daughter’s death, Ms Postle said the pain is still as raw.

She described her daughter ‘Lyss’ as a lover of bucket hats who was always doing something silly around the house and making others smile.

She was a talented athletics star and was completing her final year of school at Bray Park’s Christian Genesis School.

As she and her family continue to deal with the pain of losing Alyssa, Ms Postle has focused on raising awareness about road safety – especially for those who have just received their licenses.

Alyssa's mother Kellie Postle (pictured together) has focused her time on raising awareness about road safety

Alyssa’s mother Kellie Postle (pictured together) has focused her time on raising awareness about road safety

The 17-year-old was in hospital for three days before her life support was turned off

The 17-year-old was in hospital for three days before her life support was turned off

‘This is preventable. It’s not like cancer, it’s in our hands, we can control it if every single one of us did the right thing, this wouldn’t be happening,’ she said.

Ms Postle has created the Live4Lyss Facebook page which is regularly updated with road safety awareness programs.

She’s also hoping to create some change in the rules surrounding P-platers and the passengers they can have when they first start to drive on their own.

Alyssa is pictured with her family. Her loved ones continue to deal with their grief nine months after the tragic accident

Alyssa is pictured with her family. Her loved ones continue to deal with their grief nine months after the tragic accident

Alyssa had been in her final year of school at the time of the accident and was a talented athletics star

Alyssa had been in her final year of school at the time of the accident and was a talented athletics star

‘I’ve had a look at places like New Zealand, and they’ve got more of a restricted licensing process so when you first go onto your Ps over there, you can only have a peer support driver as a passenger but they have to have had their open licence for at least two years,’ she said.

The mother is hoping that sharing her story of her beloved daughter’s death will encourage other families to speak to their own kids about being safe while behind the wheel.

The driver involved in Alyssa’s crash was charged with dangerous operation of a vehicle causing death.

They will be dealt with under the Youth Justice Act.