There are quite a few interestingly designed cities in the UK. I used to work in Bracknell which is similar to what you suggest with walking paths and basically

There are quite a few interestingly designed cities in the UK. I used to work in Bracknell which is similar to what you suggest with walking paths and basically parks around many of the houses, especially in an estate called Great Hollands (https://en.wikipedia.org/wiki/Great_Hollands https://en.wikipedia.org/wiki/Great_Hollands). They also have small roads that are dedicated to buses, with underpasses so that they avoid intersections. I didn't live there so I don't know a lot about it, but it did look really good and I used to go for runs along the paths there. Another interesting one to visit is Milton Keynes. This city has a large grid layout with roundabouts at the intersections, and smaller communities inside each grid block. The grid layout is intended to allow for large flows of traffic.