I don't know what that means.. not all suburbs are "collar" suburbs. Where I live, the closest grocery store for example, is 3 miles away. Closest fast food is 2 miles away. My gym is 6 miles away. Work is 12 miles away. Mall? Closest one is to the north, 16 miles away and to the south, 22 miles away. Not a single one of these locations would I use a bicycle as transportation. In fact even if I wanted to cycle to any of these places, I couldn't... I'm not biking 10-20 grocery bags weighing anywhere between 45-90lbs combined. I'm not going to retrofit my gym bag as a backpack and bike to the gym. Hell even if I didn't have a gym bag, lol imaging cycling after a squat or deadlift day? I'm good.
The point I'm making is, whatever your living conditions are, whatever you use as transportation.. is not going to be the same for everyone else. Maybe you're into the whole vision of 15 minute cities that WEF would love to implement, but it's definitely not going to happen in our lifetime. That's an entire restructuring of the lay of the land. Better off colonizing another planet to implement it.
Ah.. good ol' WEF's 15 minute city vision.