Of course the number of child accidents peaks at 11, as that's the age that the majority of kids first walk independently to school every day!! If the age moved to 13, that's when there'd be most accidents. It's almost as if some people don't know much about statistics...
No, you haven't understood the point @Doopydoor.
Yes, the number of accidents peaks at 11 as that's when many children start walking independently to school.
No, if we waited a few more years for them to start journeying independently we wouldn't see the same peak then. That's the whole point.
Basically, there is a time when children have developed sufficiently (perceptual and motor skills, prediction skills) to be able the cross busy roads safely. It varies a bit from person to person but , in general, at younger ages many children will have accidents if they attempt to cross alone. By age 12, the figure is about 2%. This figure decreases over the next few years as children develop. (This particular study was done in the US not the UK btw.)
It's to do with brain development mostly rather than road safety experience. It's like trying to potty train a child that isn't developmentally ready. Lots of accidents, lots of heartache. Wait a year and the same child picks up the skills very easily, they're ready so far fewer accidents.
Anyway, I know a 13 year old doesn't want Mummy holding their hand on the way to school - obviously not. And there are many good reasons to walk - exercise, which brings physical and cognitive benefits, environmental benefits etc. However, we are fooling ourselves if we do not acknowledge that some/many? of our 11 year olds just aren't quite ready and a number will meet with an accident as a result.
It does depend on the route, and training and instruction and practice can all help, but the science shows that, at a population level, 11 year olds aren't quite there developmentally and there isn't much you can do about that except wait.