I wish my suburb’s streets were rebuilt to pedestrian/cyclist friendly style. It would be easy as every street has very easy access to the 80km/h square of main roads that surround it
You could block every street in the suburb in its middle and force all drivers to take the shortest path to a fast road, and let bikes and walkers take the short paths within the suburbs.
My street has about 2000 cars a day, with over 90% of them using it as a short path between two fast roads, or accessing or leaving a destination in a different part of the same suburb.
A friend lives in a suburb that’s a tree structure, that’s about a third best as there are no destinations from the “trunk” roads to anything but destinations within the suburbs. I’d hate to see that suburb needing to be evacuated quickly, but they’re deep in suburbia and on a hill, so safe from fire and flood