"Foreword This document (EN 12899-4:2007/FprA1:2012) has been prepared by Technical Committee CEN/TC 226 ""Road equipment""@ the secretariat of which is held by AFNOR. This document is currently submitted to the Unique Acceptance Procedure. This document is an amendment to EN 12899-4:2007. The main reason for this amendment is to incorporate in the series of existing standards EN 12899:2007 (Parts 1 to 5)@ a new standard EN 12899-6@ which deals with the visual performance of retroreflective sign face materials."