Open electronic tender, of P.K.M./Y.T.E.M.E.TH. for the selection of the contractor for the provision of services: "MAINTENANCE, RESTORATION - IMPROVEMENT - EXPANSION OF THE LIGHT SIGNALING FACILITIES OF THE PROVINCIAL ROAD NETWORK OF THESSALONIKI 2025-2026-2027", with an estimated value of €705,645.16 ( plus VAT .), with the award criterion being the most economically advantageous offer, based only on price (EXPIRED)