Negotiated invitation to tender, deadline 04.05.2016, for the design of the new 6.7km double tube and single track Offenburg tunnel. This is part of the improvements for the Karlsruhe – Basel line (PfA 7.1).Duration of the contract is from 02.01.2017 to 31.12.2036. For further information, specifications and documents please contact Markus Metz at FEI-SW – Beschaffung Infrastruktur Region Südwest, Karlsruhe, tel +49 7219386265, fax -6279, e-mail markus.metz@deutschebahn.com. For further information visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=106060-2016. Ref.n. 15TEI18924. 13/16.