Passenger information is information provided to public transport users about the nature and state of a public transport service, though visual, voice or touchable media. A distinction can be drawn between:

• Static or Planned information, which changes only slowly and is typically used for journey planning prior to departure (stations and stops, routes, service numbers, times, trip durations, fares, etc.)
• Real time information, which changes continuously as a result of real-world events and is typically used during the course of a journey (primarily how close the service is running to time and when it is due at a stop, but also incidents that affect service operations, platform changes etc.).