Proastiakos

Proastiakós (Greek: Προαστιακός), is the name used for the suburban (commuter rail) services of TrainOSE, servicing Greece's four largest cities: Athens, Thessaloniki, Patras and Larissa; providing them with modern commuter rail links, towards their suburbs and also towards other cities and towns located around them. The service, operated by TrainOSE uses infrastructure of the Hellenic Railways Organisation (OSE).