本标准涵盖了用于规范、警告和引导道路使用者的标志。它规定了标志分类和使用的编号系统，并从颜色和形状编码方面阐述了标志的基本设计。它提供了具有标准标志编号的所有标志和标志类型的图解索引，包括标志尺寸和本系列中其他标准的参考，包括每个标志的使用。

This Standard covers the signs used for regulating, warning and guiding road users. It specifies the sign classifications and the numbering system used and sets out the basic design of signs in terms of colour and shape coding. It provides an illustrated index of all signs and sign types which have a standard sign number, and includes sign sizes and reference to other Standards in this series, which cover usage of each sign.