(19)

(11)

EP 0 830 663 A1

(12)

(43) Date of publication: 25.03.1998 Bulletin 1998/13 (21) Application number: 96915127.0 (22) Date of filing: 01.06.1996

(51) International Patent Classification (IPC):  G01C 21/ 36( . ) G08G 1/ 0962( . ) (86) International application number: PCT/IB1996/000539 (87) International publication number: WO 1996/039689 (12.12.1996 Gazette 1997/02)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (30) Priority: 05.06.1995 US 19950461052 (71) Applicant: Smart Route Systems Limited Partnership Cambridge, MA 02139 (US)	(72) Inventor: LIEBESNEY, John, P. Concord, MA 01742 (US) (74) Representative: Allsop, John Rowland  MacLeod & Co., Bledington Grounds Bledington, Gloucestershire 0X7 6XL Bledington, Gloucestershire 0X7 6XL (GB)