Heartbreaking Video Reveals Tragic Cost Of Using Phone While Driving

(Caution: Contains very distressing footage and images)

After a trucker killed a mum and three of her kids while using his phone as he drove, her family have worked with police to produce this heartbreaking video - including horrifying footage from inside his cab at the moment of impact.

WATCH: Caller Tells James About Losing Family Because Of Distracted Driver

Tomasz Kroker has been jailed today for 10 years for causing the deaths of Tracy Houghton, her two sons Josh and Ethan, and her stepdaughter Aimee Goldsmith.

It all happened on the A34 in Berkshire and the video has sparked an extraordinary reaction on our Facebook page:

Driver In Shocking Hit And Run On Family

The remarkable video - sure to move anyone who watches it - features the parents of the three kids and emotional footage of them before the accident. That gives way to footage from inside Kroker's cab, showing him flicking through his phone as he selected music while driving on the motorway.

The clip has been released by Thames Valley Police in a bid to alert drivers to the danger posed by using mobile phones while driving.

The family's car was shunted underneath the back of a heavy goods vehicle and crushed to a third of its size. They were making their way home from a camping holiday in Devon and were killed instantly.

Kroker, from Andover in Hampshire, had pleaded guilty to four counts of causing death by dangerous driving and one count of causing serious injury by dangerous driving at Reading Crown Court on 10 October.

The court heard the 30-year-old was so distracted by his phone he barely looked at the road for almost a kilometre.

Sentencing Kroker, Judge Maura McGowan told him his attention to the road was so poor, he "might as well have had his eyes closed".