• Individuelle Verkehrsbetriebe erzeugen Daten, der Verkehrsverbund stellt farhzeugrechner und stellt infrastruktur
• delphi
• GTFS Format (General Transit Feed Specification) - established on the 2000s to enable things like Google Maps public transport routing. Two main feeds: Static (ie the schedule, routes, and other metadata) and realtime (ie. vehicle positions)
• Stuttgart SBahn Chaos investigation (continuous reporting)
  • Started with aggregated data from a nonprofit
  • Moving towards looking at the data directly
• Two extremes: Aggregated data at the national level vs individual realtime routing