As a kid, you biked alongside cars doing 60mph on 2-lane unseparated highways? Certainly no one I knew growing up was allowed to do that, which limited us to the the hundred or so homes we could reach on slower roads (and zero businesses)
Yes. As a teenager when I worked at the local Burger King I used to ride my bicycle ~8 miles down farm roads and then up to the highway exit area where the BK was. Often I'd leave work at closing time (after 11pm) and ride home in the _dark_. Guess what. Bicycle lights exist and can be seen for miles on a country road.
Yes. I did. As did other kids. We had gravel shoulders wide enough for cars to pull fully off, that's where we rode.
We also rode facing traffic. That way you could see a car coming although you can hear one coming for miles. The purpose of seeing was two fold, to see what type of car, and to see of they saw you.
Every kid knew to get over further when a car came, and get over further for wider vehicles.