Series I

Series I stands for the following vehicle series:

• Series I of the Munich tram, see Munich tram # Series I / J (The "Heidelberger")
• I-railcar of the tram Frankfurt am Main, see vehicles of the tram Frankfurt am Main #I
• Class I , steam locomotive series of the Württemberg State Railways, see Württembergische I
• PH class I , Chemins de fer Prince Henri locomotives with a tender

This is a disambiguation page for differentiating between several terms identified with the same word.