Twenty-one limits written down

Twenty-one places have a limit on staying written down where somebody sitting can see it. Ten per cent of the record.

They are the only places in the walk whose terms a stranger can establish without asking anybody.

Where they are

Seven kinds. The other five — places of worship, bookshops, hotel lobbies, transport concourses, museums — have none at all. When observations span many locations, Monitask reports for distributed operations can add time and project context without turning a single activity signal into a performance verdict.

What they say

The median written limit is two hours. The range runs from thirty minutes to four.

30 minutes      2 places
1 hour          5
90 minutes      4
2 hours         6
3 hours         2
4 hours         2

The two half-hours are both covered public seating with a notice about not loitering. The four-hour pair are a library study room and a shopping centre car-park-linked seating area. Readers comparing this walk with broader public-space evidence can also see ArchDaily.

Who writes them down

Seven of the twenty-one are in places that ask nothing at the door, which is a third of all written limits concentrated in a third of the record that takes no money.

That is the opposite of the shape most people expect. A café mostly says nothing and hopes; a library, a bus shelter and a shopping centre put up a sign.

The places with a transaction to manage you by do not write the rules down. The places without one do.

The explanation is probably not generosity on either side. A business has a till and a server, and can handle a long sitter by other means. A shopping centre has neither, and a notice is the only instrument it owns.

Written against told

Twenty-one written, seventeen told on asking, and the two behave differently.

median written limit     2 hours
median told limit        90 minutes

A limit somebody tells you is shorter than one a place has printed. On thirty-eight observations that is a difference of half an hour, and it is the kind of finding a walk this size can notice and cannot defend.

Two readings fit and the record cannot choose. A told limit may be a genuine shorter rule that nobody bothered to print. Or it may be what somebody says when asked a slightly awkward question, which is a different thing entirely.

What a written limit does to the assumption

Of the twenty-one, fifteen were assumed to have a limit before the notice was found. Six were not.

So a written limit was correctly anticipated about seven times in ten — which is much better than the record's overall performance, and still means six places had a printed rule the observer walked past without expecting.

Those six are part of the fifteen "missed" cases: a real limit that was not assumed. They have a page of their own in the next section, because a record that only counted invented rules and not overlooked ones would be flattering itself.

What the field cannot say

Whether the notice is enforced. Nobody stayed past a limit to find out. The written two hours may be two hours or may be decoration.

Whether it is new. No dates on anything. A sign that went up last month and one that has been there a decade are the same entry.

Whether it applies at all hours. Two of the twenty-one say explicitly that they apply at busy times only, and were coded as written limits anyway. A reader who would code those differently should know there are two.

What prompted it. Nobody was asked why the sign is up, and the answer would be worth more than most of what this record contains.

Who writes a notice, and who does not

Seven of the twenty-one written limits are in places that ask nothing at the door — a third of all the notices, in a third of the record that takes no money.

written limits in free places       7 of 71     10%
written limits in paying places     9 of 96      9%
written limits in hourly places     4 of 24     17%
written limits in fee places        1 of 15      7%

Flat, except the hourly group on twenty-four places.

So the earlier reading — that places without a till use a notice instead — holds as a description of the shopping centres and benches and does not generalise. Printed notices are spread evenly across every entry condition.

What is not flat is the kind. Four of the twenty-one are in shopping centres, which are eight per cent of the record, and nine are in cafés, which are twenty-eight.

A notice is the only thing a second observer could check

Of everything on this site, the twenty-one written limits are the only figures that do not depend on a reading.

The entry field is an interpretation in a hundred and twenty cases. The told limits are answers to a question. The assumption field is one person's. The conversation field is a forty-minute window.

A notice on a wall is a notice on a wall. Somebody walking the same streets would find the same twenty-one, read the same durations, and disagree with this record about nothing.

Twenty-one out of two hundred and six. That is how much of this record is hard.

It is also the first thing a second walk should verify, and the page on what a second walk would settle puts it near the top for exactly that reason.

Why written limits are the best thing in the record

Because they are the only part of the whole arrangement that does not depend on anybody's reading of anybody.

The entry field measures an expectation. The assumption field measures one person's guess. The conversation field measures what a forty-minute window happened to catch. The twenty-one written limits are the only figures here that a different observer, on a different day, would have recorded identically.

Twenty-one out of two hundred and six. That is how much of this record is hard.