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The studies are subject to a disclaimer and copyright. The studies have been carried out for the European Commission and express the opinions of the organisations having undertaken them. The views have not been adopted or in any way approved by the European Commission and should not be relied upon as a statement of the European Commission's views. The European Commission does not guarantee the accuracy of the information given in the studies, nor does it accept responsibility for any use made thereof.
Copyright in these studies is held by the European Union. Persons wishing to use the contents of these studies (in whole or in part) for purposes other than their personal use are invited to submit a written request to the following address: European Commission - Mobility and Transport DG - Library (DM28, 0/36) - B-1049 Brussels or by electronic form
July 2012
March 2011
[2 MB]
[96 KB]
September 2010
June 2010
February 2010
September 2008
June 2007
[3 MB]