This devastating dashcam footage shows a Polish lorry driver fiddling on his mobile phone seconds before ploughing into a broken down car that had its hazard warning lights on.
Dariusz Tokarczyk, 47, was looking at his mobile phone to change the music playing in his vehicle and so failed to spot Jodie Moss, 21, parked on the left-hand lane of the A34 in Berkshire.
He was jailed for four-and-a-half years for causing death by dangerous driving.
He was also banned from driving for more than four years.
On March 22 last year, just before 9.30pm, Tokarczyk was driving his lorry on the southbound carriageway of the A34 just north of the M4 junction at Chieveley, Berkshire.
Miss Moss had been travelling to visit her boyfriend in Swanage, Dorset, from her family home in Swindon, Wiltshire.
But her Vauxhall Corsa suffered 'catastrophic engine failure' and there was no hard shoulder for her to pull into, so it was stationary in the inside lane with the hazard warning lights flashing.