[trgn]

Many metros could benefit from your vision.

You're describing the late 19th century ideal of Garden Cities. Clusters of towns, divided by green belts, and connected by railways and highways.

I'll speak for the US right now, there is so much country side, but it is completely inaccessible for pretty much anybody living in a city. What country-side there is near a metro, it's curated: park here, walk there, take a panoramic picture here, ... I worked in Belgium for a while, which is incredibly densely populated, and the country-side was so much more accessible. Walk out the door of your city house, and you'd be in a rural environment in 10 minutes, and you could go long distances never leaving those small roads. The USA has so much wilderness and country side, yet, it feels so much more remote, just because the cities are a sprawling mess and roads in the country-side only accommodate cars.