The Proastiakos (Greek: Προαστιακός; "suburban") is Greece's Commuter rail services, which are run by TrainOSE, on infrastructure owned by the Hellenic Railways Organisation (OSE). These services connect a city's Central railway station to important locations such as a city's port or airport, as well as its suburbs and occasionally nearby towns and cities. In Thessaloniki, there are two Proastiakos services. The first connects the city's New Railway Station with the cities of Katerini and Larissa and the second links the city with Edessa.