The original note, as written at the time
Instead of having green islands in the city. Why don’t we make the commercial blocks the islands. Of course I am considering that we are maximising the green in the city anyway. These commercial zones can be surrounded by a belt of green and then a residential belt and lastly a green belt before the main access roads. The optimal distance between the residential belt and the Commercial Market island should be a walkable distance, say 500m.
The configuration of the market islands can vary. It could for example have a surface market core surrounded by commercial towers or it could have a core of towers surrounded by a fringe of surface market.
Ongoing development
We keep trying to put green into the city as though green were a gift we are generously making. A park here, a planting strip there, a few trees apologising for the road. But the green was never the absent thing. The absent thing is the arrangement. We have built commercial districts that behave like weather — they happen to the city, they draw everything into themselves, they leave a hard edge behind them — and then we wonder why the residential fabric around them is thin and strained and always threatening to decay.
So I want to turn it inside out. Instead of green islands sitting in a commercial sea, make the commercial blocks the islands, and let the green be the water they float in.
The geometry is simple and that is the point. A market core, then a belt of green, then a belt of housing, then another green belt before you meet the main access road. Each band does one job and does it completely. The commercial core earns and draws; the first green belt absorbs its noise and its delivery traffic and its particular smell of commerce; the residential belt gets light on both sides; the outer green belt buffers the whole thing from the arterial and gives the neighbourhood a place to be from rather than a place to pass through.
And the distance between the housing and the market should be a walk. Not a bus ride, not a short drive, not a distance that requires an explanation about parking. Five hundred metres. That is the radius within which a person will reasonably choose to walk to buy a tomato and a basin and a phone card, twice in a day, in the rain, carrying a child. Every time we exceed it we quietly convert walking into vehicle movement, and every conversion is expensive to reverse.
The configuration of the island itself can vary, and should. You could have a surface market at the core — stalls, the noise and the bargaining and the particular social function of a covered open ground — surrounded by commercial towers that rise out of the outer edge. Or invert it: a dense cluster of towers at the centre with a fringe of surface market wrapping around the base, so that the stalls become the thing the towers are sitting in rather than the thing that got displaced by them.
I am not romantic about markets. They are congested and they generate waste and they are difficult to police. But they are also the last genuinely public economic space most of our neighbourhoods still possess, and the way we have been building has treated them as an embarrassment to be relocated rather than an asset to be structured. If you make the market the island, you are admitting something true — that trade is the reason the neighbourhood exists — and you are then obliged to design the belts that make it liveable instead of pretending the problem is elsewhere.
There is a further thing this arrangement does that I think matters more than the circulation logic. It gives the residential belt a green edge on both sides without giving it any private garden, and that changes what people expect from public space. A household with a walled quarter-acre does not use the park. A household with green on two sides and no wall uses the green because it is already theirs. The island is not a gift. It is a redistribution of the space we were wasting on buffers that buffered nothing.
What it costs is boundaries. Every belt is a line somebody has to administer, and every line is a place where someone will eventually propose to build a mall instead. That is the risk of making the structure visible: the structure can be edited. But a city that cannot see its own structure cannot protect it either, and I would rather have a visible rule that can be argued with than an invisible drift that cannot.