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GB/T 21379-2025Classification and coding of traffic management information attributes - Urban roads (English PDF)

交通管理信息属性分类与编码　城市道路

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

July 1, 2026

Scope

GB/T 21379-2025 is the English-translated version of 交通管理信息属性分类与编码　城市道路.

GB/T 21379-2025 is the Chinese standard "Classification and coding of traffic management information attributes - Urban roads".

Its scope clause reads: This document specifies the basic principles and rules for the classification and coding of geographical elements in urban road traffic management, as well as the classification of road segments, lanes, and road intersections.

Traffic management information attributes classification and coding for intersections, traffic facilities, key units, etc. This document applies to information entities such as road sections, lanes, road intersections, traffic facilities, and key units in urban road traffic management.

Knowledge, information processing, and information exchange. Its clauses include terms and definitions.

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Document preview — GB/T 21379-2025

National Standard of the People's Republic of China

ICS: 03.220.20
Classification: R 07
Replacing: GB/T 21379-2008

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

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Basic Principles of Classification and Coding
5.Classification and Coding Rules
6.Traffic Management Classification and Coding for Road Sections
9.Traffic Facility Traffic Management Classification and Coding
10.Traffic Management Classification and Coding for Key Units
Appendix A (Informative) Coding Example
References

1 Scope

This document specifies the basic principles and rules for the classification and coding of geographical elements in urban road traffic management, as well as the classification of road segments, lanes, and road intersections.

Traffic management information attributes classification and coding for intersections, traffic facilities, key units, etc.

This document applies to information entities such as road sections, lanes, road intersections, traffic facilities, and key units in urban road traffic management.

Knowledge, information processing, and information exchange.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

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

GB/T 920 Codes for Highway Pavement Grades and Surface Layer Types

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

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 main lane

The middle section of the road, formed by barriers along the road direction, is a section for motor vehicles only.

3.2 auxiliary lane

The section of the same road in the same direction where motor vehicles are separated by barriers, allowing motor vehicles and non-motor vehicles to travel together.

3.3 localization unit

Geographic information entities that can indicate a geographic spatial location.

3.4 Traffic facilities

Traffic equipment used on roads for traffic management, control, information monitoring, violation monitoring, and information display.

3.5 key unit

Physical facilities along the road that have a significant impact on traffic management.

3.6

Independent natural or artificial features in the real world that share spatial location and common attributes.

[Source. GB/T 37118-2018, 3.1] […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 29 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 21379

Edition	Title	Revision	Status
GB/T 21379-2025	Classification and coding of traffic management information attributes - Urban roads	current edition	Current
GB/T 21379-2008	Classification and coding of traffic management information attributes - Urban roads	previous edition	Superseded

This page sells the current edition, GB/T 21379-2025. Earlier editions are listed for reference only.

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