This only works, of course, if visitors/workers/residents can easily get there on clean, reliable public transport, and this particular area seems to have that.
And there lieth the problem. I think public transport is generally usable within the city centre. It all falls apart as soon as you try from even the suburbs.
Take my journey into work, should I chose to use public transport all the way...
1.5m walk to bus - 40m? allowing a few minutes grace so as not to miss it
1hr on the bus to do about 11 miles
A short, but around 12 min walk due to a road from bus station to train station
Clearly, as public transport is not joined up, about a 50m wait for next train
An hour on train to one end of Brum city centre
About 10-12min walk to the other side of the city, if I choose to brave a slapping walking through the usual Little Palestine, about 25m if I walk around avoid that area - which I certainly would at my normal morning arrival time.
It's around 4hrs each way. If I could park, it's about 1hr15m in the car. Sadly, you can't use public carparks in Brum city centre, as the gangs control them and use the parked cars for parts on demand.
And, to add a nail in the coffin of public transport, Banbury's official train station drop-off point, as still signposted, WILL get you a £90 fine each and every time, reduced to £45 if you pay within 30 days. Only registered taxi registrations are allowed to use the drop-off, even though they have a adjacent taxi rank, as part of local council corruption.