Transport Authority of Thessaloniki S.A. was founded by Law 4482/2017. TheTA S.A. has a public service purpose, operates in the public interest and is supervised by the Ministry of Infrastructure and Transportation. It aims at the development, coordination and monitoring of public urban transport; urban bus, ground and underground, railed or sea transport services in the Regional Unity of Thessaloniki via an integrated, high-quality transport system based on the principles of sustainable mobility.