A family have urged every driver thinking of using a mobile phone to watch this devastating footage.
The clip, released by Surrey Police, shows the moment a lorry driver smashes into the back of a car while looking for music on his phone.
As a result, a mother and her children were killed in the horrifying crash.
Officers also recently made a lorry driver look at the footage after being caught using his phone behind the wheel, reports Get Surrey.
The footage shows lorry driver Tomasz Kroker smashing into stationary traffic in 2015 while using his mobile - killing mother Tracy Houghton, 45, and three children.
This included her sons Ethan, 13, and Joshua, 11 as well as her partner's daughter Aimee Goldsmith, 11.
In the clip, Aimee's mum, Kate, said: "I continue to see drivers using their phones. It sickens me.
"If they had seen the devastation they brought my family, or to other families, by using phones, illegally... distracting themselves from driving a potential weapon...
"Would they be as sickened as we are?"
Kroker, 30, was jailed for 10 years at Reading Crown Court after pleading guilty to four deaths by dangerous driving and a single count of causing serious injury by dangerous driving.
It was revealed he was scrolling music selections for almost 1km on the A34 near Newbury.
After his conviction, former Gloucestershire police chief constable Suzette Davenport said it was up to the public to make it socially unacceptable to use your mobile at the wheel.
Nationally, the number of mobile users who text, make calls and check social media accounts has risen and "distracted driving" is expected to be the biggest single cause of death and injuries on the roads.
The lorry driver from Andover, Hampshire, pleaded guilty to four counts of causing death by dangerous driving.
