Well OBVIOUSLY running 10k is impossible without

Capt'n Midnight wrote: »

If you ran four of these back to back ,
you'd still need to run another mile to get to a point where most Americans wouldn't consider it acceptable to walk instead of driving.

Americans drive everywhere. When I lived there, my housing estate didn't have a footpath to the main road. Walking to the shops involved clambering over shrubbery and then walking on the road. A friend of mine was doing just that one evening, when the cops pulled up and questioned her. They'd stopped because it was weird to see someone walking there. There was no path to where I worked - you walked across the car park to it. There were stairs, but they were at the back of the building, while the elevators were at the front. I don't know what the heck you're quoting, but it's only fit for use as fertalizer.

Capt'n Midnight wrote: »

Atash F. Redesigning suburbia for walking and transit: emerging concepts. Journal of Urban Planning and Development. 1994;120(1):48–57

It's behind a paywall. Given the options that Dr Atash is full of it or you're misquoting him, I'll presume the latter.