Sector 17 and the market that was drawn on paper

Sector 17 has no traffic. That is the first thing you notice, and it takes a moment to understand why it feels strange: a city centre of this size, in a city of a million people, with fountains running and no cars anywhere near the shops. The precinct is raised a step above the road, paved, planted, and ringed by four storey blocks whose ground floors are all glass. Old men sit on the kerbs in the shade. Students sit on the fountain rims. Nobody is selling anything to them.

This is not a pedestrianisation that was retrofitted after the cars arrived. The cars were never meant to arrive. Sector 17 was drawn in the early 1950s as the commercial heart of a city that did not yet exist, and the drawing put it where a planner would put it: at the centre of the grid, reachable from every sector, on the axis of the civic composition.

A city that was decided before it was inhabited

Chandigarh is unusual in the degree to which its ordinary life was specified in advance. The plan divided the land into sectors of roughly 800 by 1,200 metres, each bounded by roads designed to be crossed only at set points, each containing its own school, its own small market, its own green strip. The idea was neighbourhood self-sufficiency: most daily needs within walking distance, so that most daily trips would not need to be made at all.

Commerce was not left to find its own level. It was distributed by category. Every sector got a small market for vegetables, milk and repairs. The city as a whole got one large commercial centre, Sector 17, for everything that a neighbourhood market could not carry: cloth, jewellery, furniture, banks, offices, the registration of documents. This is a hierarchy of goods, drawn as a hierarchy of places, and it is a perfectly reasonable thing to draw.

What the plan could not specify

A plan can allocate land use. It can say that this block is retail and that block is residential and this one is a school, and it can enforce that through zoning for fifty years. What it cannot do is decide which road a customer will use to reach it. That is set by where the customer comes from, and in Chandigarh the answer is: from outside the grid.

The city was built as a capital, and capitals are entered. Two arterial roads carry almost all of that entry — one running east–west, one north–south — and both of them run along sector edges rather than through sector centres. A shop on the arterial has a catchment that includes everyone driving in from another town. A shop in the middle of the grid has a catchment of people who decided in advance to come to it.

So commerce leaked. It started with the sectors immediately along the arterials — 22, 35, then 9, 8 and 26 — where a shopfront could be had at the edge of a sector facing a road. Then the leak became the structure: those edges turned into strips, the strips turned into secondary centres with their own hotels and showrooms, and by the 1990s a visitor could do everything in Sector 22 that they had come to do in Sector 17, in a market that was never designed to be a city centre at all.

The plaza survives by not being a market

Here is the part that is usually told as a failure, and it is not one. Sector 17 lost its monopoly on trade, and kept something more durable: it is the only place in the city where a person can sit outdoors, for free, for hours, without buying anything, without being moved on, and without being run over.

That is a rare thing in an Indian city centre and it is not an accident of architecture. It is the product of two decisions that were made for other reasons: the precinct was raised above the road and closed to vehicles, and it was lined with shop blocks whose arcades give continuous shade. The plan wanted a commercial centre and got a public room. Fifty years later, the commercial centre has dispersed and the public room is what people come for — families in the evening, students in the afternoon, the retired in the morning, all of them using a space that was designed for shopping and works better without it.

It is worth being precise about why this matters. A market can move: rents rise, roads change, a mall opens on the edge of town with air conditioning and parking, and the trade follows. A public room cannot move. Once a city has one, demolishing it is a visible loss, and building a new one somewhere else does not work, because the reason people go is that they already go there. Sector 17's value turned out to be in its floor, not its shopfronts.

What this says about planned cities

The usual reading of Chandigarh is a story about an idea that failed to survive contact with Indian reality — the grid too rigid, the scale too grand, the Corbusian slab too cold. The commercial history suggests something narrower and more useful: the plan was very good at the things a drawing can fix, and it was indifferent to the things a drawing cannot.

It could fix the width of a road, the height of a shopfront, the position of a school, the number of trees in a green strip. It could not fix the direction of a trip, and it could not predict that the most valuable thing it built would be a paved surface with shade and no cars on it. Both of those were decided later, by people the plan never consulted, using the city in ways the drawing had not anticipated. That is not a failure of planning. It is what planning is — a set of decisions about the fixed parts, made before anyone knows how the movable parts will move.