scope:

Introduction

Most railway signs which are required to be retro-reflective are referenced to BS873: Part 6 and divide the requirement into Class 1 (most reflective), Class 2 or Non-retroreflective. From 1^st January 2006, BS873 has been replaced by a harmonised standard BS EN12899-1 and materials tested to the old standard are no longer available.

The new standard is not exactly equivalent to the old but, for practical purposes, references may be converted. For signs defined by Railway Group Standards, this is covered by a Certificate of Non-Compliance (06/121/NC)