Rail: some of the vehicle numbers will be published at 2020-05-13 09:00
If vehicle type is Sm1, Sm2, Sm4 tai Sm5, its vehicle number will be visible
Vehicle number will be added to existing /composition reply as a new json field vehicleNumber
Example: https://rata-beta.digitraffic.fi/api/v1/compositions/2020-05-19/9224
More information about the vehicle number: https://en.wikipedia.org/wiki/UIC_identification_marking_for_tractive_stock