Islamic Republic of Iran Railways
The Islamic Republic of Iran Railways (abbreviated as IRIR, or sometimes as RAI, or as IRI Railway) (Persian: راهآهن جمهوری اسلامی ایران, romanized: Râh âhan-e Jomhuri-ye Eslâmi-ye Irân) is the national state-owned railway system of Iran. The Raja Passenger Train Company is an associate of the IR, and manages its passenger trains.
Source: Wikipedia — Islamic Republic of Iran Railways (CC BY-SA 4.0)