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GB/T 46252-2025Specification for identification of high-impact sections of road icing (English PDF)

道路结冰高影响路段排查规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 5, 2025

Implementation date

May 1, 2026

Scope

GB/T 46252-2025 is the English-translated version of 道路结冰高影响路段排查规范.

GB/T 46252-2025 is the Chinese national standard covering finding the stretches of road that ice before the rest — the bridges and the shaded cuttings, the drainage that leaves water on the surface, the local temperature and wind, the accident record, and the classification that decides where the salt and the warnings go. First edition, under the China Meteorological Administration, with the fog survey standard GB/T 46251-2025. In force from 1 May 2026. Issued on 5 October 2025, it has been in force since 1 May 2026.

Document preview — GB/T 46252-2025

National Standard of the People's Republic of China

ICS: 07.060
Classification: A 47

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

PrefaceIII
1 Scope1
2 Normative References1
3 Terms and Definitions1
4 Investigation Process1
5 Review of materials2
6 Direct determination2
7 Comprehensive Judgment3
8 Results Summary5
9 Verification Methods5
Appendix A (Normative) Sample Form for Investigation and Data Collection of Road Sections Highly Affected by Road Icing6
Appendix B (Normative) Assignment of Risk Values to Assessment Indicators8
References9

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Meteorological Administration.

This document is under the jurisdiction of the National Meteorological Disaster Prevention and Mitigation Standardization Technical Committee (SAC/TC345).

This document was drafted by: Nanjing Meteorological Science and Technology Innovation Research Institute, Road Traffic Safety Research Center of the Ministry of Public Security, and Road Network Monitoring Center of the Ministry of Transport.

In conjunction with the Emergency Response Center, Yunnan Provincial Transportation Planning and Design Institute Co., Ltd., Jiangsu Provincial Meteorological Service Center, and Beijing CCCC Huaan Technology Co., Ltd.

Limited Liability Company, Anhui Provincial Public Meteorological Service Center, and China Power Construction Group Chongqing Engineering Co., Ltd.

The main drafters of this document are: Zu Fan, Zhu Chengying, Liu Duanyang, Zhang Di, Li Yingwei, Yang Feng, Sun Guanglin, Yan Mingyue, Yang Wenchen, Qi Chen, and Wu Hong.

Wang Hongbin, Zhang Zhendong, Han Hui, Jiang Chun, Zhou Jianping, Suo Chen, Zheng Min.

Road Icing High-Impact Section Investigation Standards

1 Scope

This document specifies the procedures for identifying high-impact road sections due to road icing, including the required data collection, direct assessment, comprehensive assessment, and result summarization.

The question describes the corresponding verification method.

This document applies to the investigation of high-impact road sections caused by road icing on highways; ordinary roads can refer to it for reference.

2 Normative references

GB/T 46251-2025

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Road icing

The road surface is in a state of ice, frost, snow, or a mixture of ice and snow.

3.2 Number of freezing days

Using 20.00 Beijing time as the day boundary, a day with an average daily temperature of 1°C or less, a minimum daily temperature of 0°C or less, and precipitation is considered a valid day. Number of days.

3.3 Number of frost days

The number of days with frost observed is determined by taking 20.00 Beijing time as the dividing line.

3.4 Traffic volume

The number of vehicles or pedestrians passing through a certain section of a road per unit of time.

[Source. GB/T 31418-2015, 2.2.3]

4 Investigation Process

The investigation of road sections highly affected by road icing should begin with data collection, followed by direct or comprehensive assessment, and finally, a summary of the investigation results.

The determination should be based on the results of road icing risk assessment and disaster prevention and mitigation capacity assessment to identify high-impact road sections due to road icing. Figure 1 specifies...

Procedure for identifying road sections with high impact from road icing.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 46251-2025Specification for identification of high-impact sections of road dense fog

Editions of GB/T 46252

Edition	Title	Revision	Status
GB/T 46252-2025	Specification for identification of high-impact sections of road icing	current edition	Current

This page sells the current edition, GB/T 46252-2025. Earlier editions are listed for reference only.

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