Къде е тролеят

Къде е тролеят ("Where is the trolley") shows where every trolleybus, tram and bus in Sofia is right now, and when it will reach your stop.

WHAT IT DOES
• Live vehicles: every Sofia Urban Mobility Centre (CGM) vehicle sending GPS data appears on the map as an arrow with its line number, pointing the way it is heading.
• Arrival predictions: pick a stop and see in how many minutes the next trolleybuses, trams and buses arrive.
• Nearby stops: the app finds the stops around you and shows only the vehicles that pass through them.
• Route tracking: tap a vehicle to see its whole route with every stop and the predicted times.
• Full-day timetable for every stop, metro stations included.
• Works without location too: browse every stop and vehicle in the city.

HOW IT WORKS
Predictions come from how the vehicles actually move, not from the timetable: the app tracks speeds on every section of every route and updates them every second. The data is the open data of the Sofia Urban Mobility Centre (Център за градска мобилност ЕАД, CGM), licensed CC BY 4.0 (see "Data sources" below).

DATA SOURCES (complete list)
The app uses only the following two sources:
1. All public transport data (vehicle positions, lines, routes, stops and timetables, metro included) is the GTFS and GTFS Realtime open data published by the Sofia Urban Mobility Centre (CGM), a company owned by Sofia Municipality, on its official page https://www.sofiatraffic.bg/bg/info-center/gtfs-danni (CGM's official website: https://www.sofiatraffic.bg).
2. The background map is from OpenStreetMap: https://www.openstreetmap.org/copyright
No other data sources are used.

PRIVACY
Your location is processed on your device only and is never sent to our servers. No sign-up, no ads, no personal data collected.

IMPORTANT
Къде е тролеят is an independent app by RosemaryTech. It does not represent, and is not affiliated with or endorsed by, the Sofia Urban Mobility Centre (CGM), Sofia Municipality or any other government entity. Data is provided "as is"; predictions are estimates and can differ from actual arrival times. For official information contact CGM: https://www.sofiatraffic.bg

Web version: https://kadeetroleyat.com