The Thessaloniki Urban Transport Organization (Greek: Οργανισμός Αστικών Συγκοινωνιών Θεσσαλονίκης) abbreviated OASTH (Greek: ΟΑΣΘ) is a mass transport organization operating in Thessaloniki Greece.It was founded in 1957 and now covers a large area of the metropolitan area of Thessaloniki the country’s second-largest city. OASTH only includes bus transportation due to lack of other means of transport.
