(19)

(11)

EP 2 488 699 A1

(12)

(43) Date of publication: 22.08.2012 Bulletin 2012/34 (21) Application number: 10822886.7 (22) Date of filing: 28.09.2010

(51) International Patent Classification (IPC):  E01D 1/00(2006.01) E01D 2/04(2006.01) E01D 22/00(2006.01) G01M 3/02(2006.01) (86) International application number: PCT/AU2010/001268 (87) International publication number: WO 2011/044611 (21.04.2011 Gazette 2011/16)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 14.10.2009 AU 2009905001 (71) Applicant: Roads and Maritime Services North Sydney, NSW 2060 (AU)	(72) Inventor: TILLEY, Mark, Robert North Sydney, New South Wales 2060 (AU) (74) Representative: Driver, Virginia Rozanne  Page White & Farrer Bedford House John Street London WC1N 2BF London WC1N 2BF (GB)