Open invitation to tender, deadline 20.11.2018, for the maintenance and upgrading of the central IT systems of the Parisian tunnels to bring conformity and enable traffic management. Duration of the contract will be 48 months. For bid documents https://marches.maximilien.fr where offers must be sent. Contact Ville de Paris, Paris, e-mail dfa-bm3@paris.fr. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=459779-2018 and http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=473347-2018. Ref.n. 2018V12067580. 43/18.