# When each station peaks

> Every station has a busiest quarter-hour. They are not the same one.

- Category: Transport
- Cadence: weekly
- Status: Published on a weekly cadence.
- Dataset key: `station-peaks`
- Source: [TfL Unified API](https://api.tfl.gov.uk/)
- Licence: TfL Open Data Licence — [terms](https://tfl.gov.uk/corporate/terms-and-conditions/transport-data-service)
- Canonical page: [https://londongraph.com/g/when-each-station-peaks](https://londongraph.com/g/when-each-station-peaks)
- Machine-readable record: [https://londongraph.com/data/when-each-station-peaks](https://londongraph.com/data/when-each-station-peaks)

## Methodology

The single busiest fifteen-minute band in a week at each of the forty busiest interchanges, from TfL's crowding profiles, coloured by which day it falls on. Percentage of each station's own baseline, so the colour says when a station peaks rather than how it compares with its neighbours.

## Visualisations

- [Map](https://londongraph.com/g/when-each-station-peaks): Every station has a busiest quarter-hour. They are not the same one.
- [Breakdown](https://londongraph.com/g/when-each-station-peaks?view=breakdown): Summarise the categories represented by the mapped records without loading every coordinate.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.