GB/T 920-2023Code for highway pavement classification and type (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 920-2002 Code for classification and type of highway pavement. Compared with GB/T 920-2002, except for the structural adjustment and editorial revisions, the main technical changes are as follows:

a) The terms and definitions, such as "pavement", "surface course", "hot mix asphalt surface course", "cement concrete surface course", "surface dressing", "penetration macadam surface course", "block surface course" and "gravel surface course", are added (see 3.1~3.8);

b) The classifications of pavement grades and surface course types are changed (see Chapter 4; see Chapter 3 of the 2002 edition);

c) The code structure is changed (see Chapter 5; see Chapter 4 of the 2002 edition);

d) The code of the pavement grade and the code of the surface course type are changed (see Chapter 6; see Chapter 5 of the 2002 edition).

1 Scope

This document specifies the division principles, coding methods, and codes of highway pavement grades and surface course types.

This document applies to the processing and exchange of information on highway pavement grades and surface course types.

2 Normative references

The following documents contain the provisions which, through normative reference in this document, constitute the essential provisions of this document. For the dated referenced documents, only the versions with the indicated dates are applicable to this document; for the undated referenced documents, only the latest version (including all the amendments) is applicable to this document.

GB/T 917 Mark rules of highway route and number of national trunk highway

3 Terms and definitions

The following terms and definitions apply to this document.