Of course it's about safety as well. Several of the children I knew when I grew up were killed in traffic, all roads it happened on have separate bike lanes now

Of course it's about safety as well. Several of the children I knew when I grew up were killed in traffic, all roads it happened on have separate bike lanes now. But sharing the roads with kids that go to school can also be an annoyance, tending to ride with three kids next to eachother and making sudden movements because they're fighting/playing.