１范围本标准规定了公路行政等级与公路技术等级的代码，适用于公路等级信息的处理与交换。２引用标准下列标准所包含的条文，通过在本标准中引用而构成为本标准的条文。本标准出版时，所示版本均为有效。所有标准都会被修订，使用本标准的各方应探讨使用下列标准最新版本的可 1 Scope This standard specifies the code of highway administrative level and highway technical level, suitable for highway grade information processing and exchange. 2 Normative references The following standards contain provisions which, through reference in this text, constitute the provisions of this standard. At the time of publication, the editions indicated were valid. All standards will be revised, the parties using this standard should explore the use of the latest version of the following criteria may