Safety is.a precursor to active transport. If it's not safe, people look for a workaround, they won't turn up. This is especially likely if the users are children. It's common for primary school kids to cross 60km/h roads on their way to school. If they are hit by a vehicle at this speed, they will almost certainly be killed. They're also more unpredictable and more likely to make mistakes than adults. If the conditions aren't safe, parents are likely to look for a workaround. More than likely, it will be to buckle them into a car. It solves one problem but adds to the bigger one.
It's not enough to make it safe for adults. We need to understand how children operate and provide for that. It's also not enough to plan for 8 to 80. By the time the youngest child in a family reaches 8 years old, elder children will be near finished primary school. Important windows for learning are lost, and family habits established.
Although they don't have licenses, kids make many trips. To school, extra-curricula activities, family, friends. They might not be as I high as you'd expect in terms of road safety statit