A video showing the moment a motorcyclist was killed in a crash with a car has been viewed online more than three million times.
David Holmes, 38, was riding at about 97mph (156 km/h) when he died on the A47 at Honingham, Norfolk, last year.
Norfolk Police posted a video of the crash, filmed by a camera on Mr Holmes’ helmet, on Thursday.
Ch Insp Chris Spinks said it had generated a “truly remarkable” amount of discussion about road safety.
Mr Holmes’ family allowed the film’s release in a bid to try to stop more road deaths.
It shows Mr Holmes travelling from King’s Lynn and overtaking several cars and motorbikes before being hit by a Renault Clio as it turned at a junction.
Mr Holmes is heard making an agonised call as he realises he cannot avoid the crash.
The driver of the car was prosecuted in April.
Mr Holmes’ mother, Brenda, is shown on the video talking about the heartache of losing a child and makes a plea for people to be more careful on the roads.
She said if the video could save one life, it would be worth it.
“It has a huge shock impact and the difference is it’s not a staged, mocked up advert,” she said.
“It’s real. It’s a real life, and a real life lost.”
Hundreds of comments have been left on Norfolk Police’s Facebook post about the video, with many saying it was a warning to both car drivers and bike riders.
Mr Spinks said: “The fact the public has taken such an interest means they are talking about road safety, which was our aim all along.”
By Edos News