Translations:Zasady numeracji pociągów/19/en
From TTSK
For trains changing their type during their run (e.g. from MPE to EIE, ROJ to RPJ) the train number from the start of the journey applies throughout the entire route
For trains changing their type during their run (e.g. from MPE to EIE, ROJ to RPJ) the train number from the start of the journey applies throughout the entire route