Open invitation to tender, deadline 17.03.2011, for renewal of low-voltage transformers and new installation of video surveillance, tunnel radio and sound systems on A46 motorway at Duesseldorf, including 1,026 m-long Universitat and 869 m-long Wersten dual tunnels. Contract duration 14 months. More from Kaneliza Sekertzi at Strassen NRW in Krefeld, tel +49 2151819-205, fax -420, e-mail ANL-KR-Vergabeservice@strassen.nrw.de. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=047790-2011. 08/11.