Invitation to tender by negotiated procedure deadline 22.04.2016, for draft studies of the Metro Line 1 extension from Chateau de Vincennes to Val de Fontenay to cover the three new stations, a 7 km tunnel and assistance center. Duration of works is for 18 months from award. For further information contact RATP, att.n Fosse Yvon, Paris, e-mail yvon.fosse@ratp.fr. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=116134-2016. Ref.n. DHA_2016MOP7442. 14/16.