How we check facts

1. Official sources first

Facts start from official material: city and transit operator publications, and open government data. We do not use reviews or rankings.

2. AI drafts, a person checks

An AI tool helps collect and draft the facts from those sources. A person then checks each one before it goes on a page. Nothing is published straight from the AI draft.

3. Source and date on every number

Each number shows its source and the date it was checked. Values that are estimates are marked as estimates.

4. Old facts are flagged

If a fact was last checked more than 90 days ago, the page shows a “may be outdated” badge next to it until it is checked again.

Something wrong?

Please tell us. Live crowd, weather and train data come straight from the providers and can differ from what you see on the ground.