I always have wondered why people are so opposed to banning cars from an area, when those very same people probably fairly enjoy the setup of places like Center Parcs or Butlins where cars are predominantly banned from site.
Now I know things are quite different when you're on holiday rather than day to day life.
However for most a 5 minute walk to their car first thing isn't going to change their day by very much.
Provide a primary school, shops and other facilities on the edge of of the car free zone so that they are easily serviced. With roads between car free zones being raised up to allow at grade travel to the next zone with a secondary school for a few car free zones.
The car parks would be covered by CCTV, with barrier entry/exit (vehicles and pedestrians) to identify those within the parking area. These parking areas could be under/over the shops/the school/other facilities to maximise land use.
There could be cargo bikes which could be booked to transport shopping, whilst a delivery hub (so no waiting in for deliveries) which would collect larger items and then deliver them at an agreed time.
Likewise refuse collection could be undertaken by a vehicle, but generally vehicles within the car free zone would be fairly rare. Even if there were buses going through the zones.
This would free up a lot more space for planting, parks and gardens than would otherwise be the case.
Children wouldn't need to cross roads to get to school and so would likely be able to walk or cycle to school at a younger age than they would otherwise be aloud to.
There would be business parks/office buildings around and about as well, these would also share the car parks (this would reduce the overall amount of parking required). However it's likely that there would be a good number of local residents working near where they live as they then wouldn't need to own a car. Reducing their outgoings by £2,500 to £3,500 and meaning that they didn't near to earn £3,000 to £4,000 a year to cover those costs.
If there was a train station within the settlement, then that would likely be well used and would increase the scope for those working elsewhere.
Yes it would be quite a cultural shift from what we have at the moment, however I suspect that once people try it that they would prefer it to the more traditional housing layouts. Developers would like it as they could fit more housing into the same area. Parking issues would be less of a problem, as would congestion getting out of hiding estates which is often caused by parked vehicles.