The indicator shows the proportion of school trips in primary and secondary school compared to all journeys. Includes bus - function 730, county ferries - function 731, boat routes - function 732 and subway and tram - function 734. School trips: The sum of school trips in primary and secondary school. Data source: Form 50, KOSTRA Transport. All trips: Number of total eligible passengers. Data source: Form 50, KOSTRA-Transport.