The figures you quote speak for themselves. Lower speed impacts are less likely to result in a fatality.
But vehicles have changed a great deal, one recalls bumper bar lower leg fractures at relatively low speeds when bumpers were solidly made and mounted. New energy absorbing designs have consigned those injuries to history.
Makers are actively looking to make pedestrians safer, but its never going to achieve 100% safety through engineering alone.
Neither is lowering speed restrictions to comical levels such as 15mph in some streets I’ve seen. I have dealt with several serious injury and fatal pedestrian collisions at walking speed, where the pedestrian was solely at fault, walking behind a reversing vehicle or, in one case, a couple laying down in the carriageway attempting to have drunken sex. Not recommended on an unlit and rubbish strewn roadway.
The only resolution is to separate pedestrians and vehicles wherever possible, either by barriers or awareness of the risks of jaywalking as the Americans call it. The fact is pedestrians will walk into traffic heedless of oncoming vehicles, they will step off kerbs without looking behind, they will walk into queuing traffic placing themselves at risk when the traffic moves off.
If a car drives on the pavement there is a penalty in law, if a pedestrian does as they please in the carriageway and gets hurt we blame the vehicle, not the errant pedestrian.
The other big thing is driver behaviour around speed restriction signs; it is a maximum but not necessarily safest speed dependant upon conditions. You wouldn’t try to do 60 in thick fog, or would you?
So many drivers treat the sign as a target with discretion to go faster if they are late or feel the limit has been set lower than their ability dictates.
Young drivers are unbelievably unaware of risk when driving. They think that the car will react instantly to driver input. They never learn what it feels like to do an emergency manoeuvre, other than when the examiner taps the dash board at 30 mph. Driving in fog, snow, ice are spectacularly left to suck it and see.
Kids at 17 should not be allowed to drive, I’m sorry but it’s a fact. Literally they can go from L plates to a fast hatch in one day, never having experienced the conditions they will face. Let alone they may fsve them alone or worse with a car full of their peers urging them to “see what it will do”
I was 21 when I passed my test and still felt ill equipped to deal with the huge responsibility of driving, at 17 I would definitely not have been mature enough to cope. A friends son has just passed his test at 17. She is terrified of the police arriving to tell her he has been killed. He can’t even make his own breakfast or work the washing machine, but he’s on the roads in a ton of metal travelling at speed. NOT SAFE.