At what age did you start trusting them do things like only crossing at approved intersections?
They’ve both been very trustworthy for a long time, as demonstrated in daily life. Very occasionally they, usually the younger one, will attempt to sneak something that is prohibited, but it’s very rare. I was much more concerned that they wouldn’t cross carefully enough, then that they might go farther than allowed.
But this is my experience with my particular kids, and I’m sure others have different experiences.
I think it works as long as they benefit from the rules and the overall scheme and trust you that you help them grow. If the rules get relaxed or extended as they grow (which may be fast). Some parents try to create fear of things they believe to be dangerous or that they want the kids to avoid for other reasons. If kids figure out that these things are not actually dangerous they will wonder what else they have been lied to. They may be mistaken in this so it is important to back it up. One example is: “Don’t put your finger in the door gap (esp the one at the hinges).” “Why not? Doesn’t look dangerous.” Explain levers by demonstrating with a nut or something else they know is pretty hard.
There are studies—though possibly biased ones—that show that children under the age of 10 can’t reliably (i.e.,>99%) handle the complexities of traffic:
For example, children under the age of ten cannot yet reliably estimate distances and speeds.Directional hearing, the perception of several simultaneous processes and the right-left distinction are uncertain.Even at this age, threatening noises often lead to dangerous escape reactions.-- https://www.kindergesundheit-info.de/themen/sicher-aufwachsen/sicherheit-im-alltag/verkehrssicherheit/ (typical German publication backed by studies in traffic education)
For example, children under the age of ten cannot yet reliably estimate distances and speeds.
Directional hearing, the perception of several simultaneous processes and the right-left distinction are uncertain.
Even at this age, threatening noises often lead to dangerous escape reactions.
-- https://www.kindergesundheit-info.de/themen/sicher-aufwachsen/sicherheit-im-alltag/verkehrssicherheit/ (typical German publication backed by studies in traffic education)
But kids learning and impulsivity vary dramatically. Know your kids. We let our kids go to school alone by age 7 - the only crossings were a very one low-traffic zebra crossing close to the school, one very safe street crossing with traffic lights, and the street directly in front of our house.
Part of why I’m okay with them crossing the streets they do cross is that they can use the strategy of only crossing when they can’t see any moving cars. This means they don’t have to use distance / speed estimation.
And you can trust them to follow these rules even unattended.