Privacy

This notice covers two things: the camera images the project processes, and your visit to this website.

Camera images

• Source. Still images from Transport for London’s public JamCam traffic cameras, published by TfL as open data.
• In memory only. Each image is downloaded, analysed and discarded in memory. Images and crops are never stored on disk or in logs, caches, backups, git or analytics services, with one exception, a check by hand, described below. Automated checks enforce this on every change to the software.
• No identification. We do no face detection, no face recognition, no re-identification and no tracking of anyone across images.
• Only counts are kept. What we store and publish are aggregate counts, for example how many people in a sweep wore a coat. The site never shows camera images.
• Accuracy checks. A person checks samples of the people detected in current camera images by hand, on their own computer: at least 300 before launch, then about 100 a month and after any change to the detector. The crops appear in a window on screen and are never saved; only the tallies and each box’s height in pixels are kept. For one-off tests of automatic clothing labels, the same small crops of single people (never whole camera images) may also be sent, in memory, to an open-weights AI vision model hosted by DeepInfra, whose terms say inputs are not stored, logged or used for training. Only the answers are kept, as counts.
• Lawful basis. Under UK GDPR our lawful basis is legitimate interests: publishing aggregate statistics about what people wear. Images are handled only in memory, nobody is identified, and only counts are kept.

Your visit to this site

• No cookies, no accounts, no analytics scripts. This site sets no cookies, has no sign-up and runs no tracking or analytics scripts.
• Hosting. The site is served by Cloudflare, which processes standard request data (such as IP address and browser type) to deliver and protect the site. See Cloudflare’s privacy policy.
• Location. The forecast tool asks for your location only when you press “Use my location”. Your browser then sends your approximate position (rounded to about 1 km) directly to the US National Weather Service (api.weather.gov) to get your local forecast. We never receive, store or log it. Outside the US, you can type a temperature instead.

Contact

Questions about this notice, or requests about data: [email protected].

Last updated: 2026-09-29.