Open invitation to tender, deadline 24.08.2010, for structural and operational upgrade of B500 Michaelstunnel including 900 m of construction in main tunnel, 20 m-deep escape staircase with 20 m tunnel, and new axial and jet fans, vents, speakers, lights and radio. Further information from Lars Lau at RPK in Karlsruhe, tel +49 721926-0, fax +49 72193340264, e-mail Lars.Lau@rpk.bwl.de. Specs and docs from SBW in Stuttgart, tel +49 71166601-45, fax -84, e-mail vergabeunterlagen@staatsanzeiger.de. Time limit for accessing documents 23.08.2010. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=220164-2010. 30/10.