This page shows a number only where one exists, and says where it comes from. Where the data doesn't hold up, you'll see a dash or a gap, not a pretty guess.
Delays and cancellations exactly as the operators report them, for example from the Wiener Linien official feeds. This data streams in by the second.
Labelled “operator delay”.
The scheduled times as planned. They exist for every trip, even when no realtime is coming in, and they are the base everything else builds on.
Labelled “timetable”.
From measured arrivals and departures we compute our own numbers: punctuality after the fact, departure estimates ahead of it. An estimate is only shown where it grades well against official realtime.
Labelled “our own live estimate” or “measured”.
Primary source for nationwide timetables, place search, routing and embedded disruption information.
Official operator realtime for Vienna stops and the network map's live departure boards.
Authorised regional scheduled and realtime stop events for Styria and the reliability history derived from them.
OpenStreetMap supplies mapped station paths; MapKit provides maps plus supplementary on-device address and POI search.
GeoSphere observations inform the server-side estimate inputs; Open-Meteo adds weather context in the iPhone app.
The website runs on Vercel and the ÖffiGo API on Railway. Supabase stores approved aggregates and beta requests, Cloudflare protects and caches public API responses and archives raw data, and Resend sends transactional confirmations only when mail delivery is configured.
HERE Traffic currently supplies no data to ÖffiGo. Technical fallbacks are not publicly guaranteed data sources and are therefore not presented as partners.
We count individual stops: arrivals and departures at the platform. No GPS points from moving vehicles, which wouldn't say anything about schedule deviation anyway. Every day we hold our own estimates against the operators' official realtime and note the deviation. Those grades decide whether an estimate is shown at all. Current figures:
Processing completes each day before it counts: a day appears in the statistics only once all of that day's arrivals and departures have been handled. So the end of a chart can sit behind today's date. When collection for an area is paused, the affected charts show the historical stand through the last complete day and say so.
Today's measurements, long-run punctuality, service state and every change to the data: every view on this website draws from the same sources as this page.
ÖffiGo