Our kids went/go to a school often quoted as having the highest proportion of kids cycling of any high school.
You can believe it 8am to 9am is absolute mayhem with literally thousands of kids on bikes going one way and hundreds of adults on bikes going the other.
Very few of the kids wear helmets and despite buying and trying every type my kids are the same, but I would have to say on the 20yrs weve lived here theres never been an serious incident and like I say lots of people ride bikes a lot of the time.
The hi viz wobbly plastic hat commuters are another matter though, they are a danger to themselves and everyone else.