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GB/T 18731-2025Rules for locating arterial highway (English PDF)

干线公路定位规则

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 1, 2025

Implementation date

February 1, 2026

Scope

GB/T 18731-2025 is the English-translated version of 干线公路定位规则.

GB/T 18731-2025 is the Chinese standard "Rules for locating arterial highway".

Its scope clause reads: This document specifies the design, identification, selection, collection, coding and other aspects of the positioning reference system for trunk roads consisting of national and provincial roads. and positioning information application requirements.

This document is applicable to the positioning of trunk roads consisting of national and provincial highways, and can be used as a reference for other roads. Its clauses include terms, definitions and abbreviations.

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Document preview — GB/T 18731-2025

National Standard of the People's Republic of China

ICS: 03.220.20
Classification: R 07
Replacing: GB/T 18731-2002

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms, Definitions and Abbreviations
4 Design of the positioning reference system for arterial roads
5 Arterial Highway Positioning Reference System Marking
6 Selection of positioning elements for trunk roads
7 Collection of positioning elements of trunk roads
8 Arterial Highway Positioning Code
9 Application of Trunk Road Positioning Information
Appendix B (Normative) Classification Code for Arterial Highway Positioning Elements

1 Scope

This document specifies the design, identification, selection, collection, coding and other aspects of the positioning reference system for trunk roads consisting of national and provincial roads.

and positioning information application requirements.

This document is applicable to the positioning of trunk roads consisting of national and provincial highways, and can be used as a reference for other roads.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document.

GB/T 917 Rules for Highway Route Signage and National Highway Numbering

GB/T 2260 Administrative Division Codes of the People's Republic of China

GB/T 7930 1:5001:10001:2000 Internal specification for aerial photogrammetry of topographic maps

GB/T 7931 1:5001:10001:2000 Field specification for aerial photogrammetry of topographic maps

GB/T 12897 National first and second class leveling specifications

GB/T 12898 National third and fourth grade leveling specifications

GB/T 12979 Specification for close-range photogrammetry

GB/T 13977 1:50001:10000 Field specification for aerial photogrammetry of topographic maps

GB/T 13990 1:50001:10000 Internal specification for aerial photogrammetry of topographic maps

GB/T 16831 Standard representation of geographic point locations based on coordinates

GB/T 17942 National Triangulation Specification

GB/T 18314 Global Navigation Satellite System (GNSS) Measurement Specification

GB 22021 Basic Technical Regulations for National Geodetic Surveying

GB/T 35628 Realistic map data products

GB/T 40527 Specification for digital aerospace photogrammetry and mapping

GB 50026 Engineering Measurement Standard

CH/T.2014 Technical Specification for Coordinate Transformation of Geodetic Control Points

CH/T 3020 Technical Specification for LiDAR Measurement of Real-Scenery Three-Dimensional Geographic Information Data

CH/T 8023 Technical Specification for Airborne LiDAR Data Processing

CH/T 8024 Technical Specification for Airborne LiDAR Data Acquisition

CH/T 9015 Specification for 3D Geographic Information Model Data Products

CH/T 9016 Production Specification for Three-Dimensional Geographic Information Models

JT/T 412 National Highway Main Control Point Code

3 Terms, definitions and abbreviations

3.1 Terms and Definitions

The following terms and definitions apply to this document.

GB/T 20134 | GB/T 35070.3 | GB/T 35070.2 | GB/T 19948 | GB/T 19947 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 18731

Edition	Title	Revision	Status
GB/T 18731-2025	Rules for locating arterial highway	current edition	Current
GB/T 18731-2002	Rules for locating highway of trunk	previous edition	In force

This page sells the current edition, GB/T 18731-2025. Earlier editions are listed for reference only.

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