Is it called Dangerous Driving?

A relative of mine has just been tail ended.

Sat at a roundabout waiting to emerge they were hit from behind by a builders van, resulting in little or no damage to the beat up  van but the back of the car suffered serious damage.

The reason for the accident? The van driver couldn’t stop because a plastic bottle had rolled under the brake pedal.  Apparently the foot well was full of tools, crayons, and even a jack. He said he kept telling his boss to clear it out.

Not a lot you can say to that apart from do we have to tell people not to litter the floor with junk, doesn’t common sense tell them a bottle might roll toward the peddles?  Or do I just expect too much from people.