When I was that age, cycling was a lot more dangerous than any of those crossings. Children aren't babies, they're not totally incompetent, they know traffic can be dangerous, they don't want to die and fear helps them pay attention. In large parts of the world children have to cope with greater dangers and more complicated dangers, and they do. It's really not that hard to stop at those shark teeth, every child on a bike knows them, and looking left and right isn't beyond them either. And if you were scared to cross you just didn't and waited for an adult to help you.

Thanks for the picture of one of my favorite painters.