GB/T 45645.1-2025Technical guidelines for in-depth investigation of road traffic accidents — Part 1: General principles (English PDF)
道路交通事故深度调查技术指南 第1部分:总则
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 30, 2025
Implementation date
December 1, 2025
Scope
GB/T 45645.1-2025 is the English-translated version of 道路交通事故深度调查技术指南 第1部分:总则.
GB/T 45645.1-2025 is the Chinese national standard covering the investigation that goes past assigning blame for a crash and asks why it was possible — which accidents are investigated in depth and who does it, the five elements examined of driver, vehicle, road, management and enforcement, and emergency response and rescue, the comprehensive reconstruction that rebuilds the sequence, the countermeasures drawn from it, and the report and the data submitted. Part 1 of the series, planned in seven parts. First edition, under the Ministry of Public Security. In force from 1 December 2025. Issued on 30 May 2025, it has been in force since 1 December 2025.
Document preview — GB/T 45645.1-2025
National Standard of the People's Republic of China
- ICS
- 03.220
- Classification
- R 80
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- PrefaceIII
- IntroductionIV
- 1 Scope1
- 2 Normative references1
- 3 Terms and Definitions1
- 4 Basic Principles1
- 4.1 Scope of Investigation1
- 4.2 Investigators2
- 4.3 Survey Methods2
- 4.4 Investigation Process2
- 4.5 Other requirements2
- 5 Survey and Analysis Content2
- 5.1 Human Factors2
- 5.2 Vehicle elements2
- 5.3 Road elements3
- 5.4 Management and enforcement elements3
- 5.5 Emergency response and rescue elements4
- 5.6 Comprehensive reconstruction of the accident and cause analysis4
- 5.7 Countermeasures and Suggestions4
- 6 Survey Results4
- 6.1 Accident in-depth investigation information4
- 6.2 Accident In-depth Investigation Report4
- 6.3 Accident in-depth investigation data submission5
- Appendix A (Informative) General process of in-depth investigation of road traffic accidents6
- Appendix B (Informative) Directory of In-depth Investigation Data Files of Road Traffic Accidents7
- References8
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.
This document is Part 1 of GB/T 45645 "Technical Guidelines for In-depth Investigation of Road Traffic Accidents". GB/T 45645 has been published The following parts.
— Part 1: General.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is issued by the Ministry of Public Security of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee for Road Traffic Management Standardization (SAC/TC576).
This document was drafted by: Traffic Management Science Research Institute of the Ministry of Public Security, Road Traffic Safety Research Center of the Ministry of Public Security, and Traffic Management Bureau of the Ministry of Public Security.
The main drafters of this document are: Wang Changjun, Li Pingfan, Li Zhe, Wei Ran, Pan Hanzhong, Gao Yan, Gong Biao, Zhang Yong, Wu Xiaodong, Zhou Fen, and Yu Chunjun.
Introduction
In-depth investigation of road traffic accidents is a comprehensive study of the personnel, vehicles, roads, management and law enforcement, emergency response and rescue involved in road traffic accidents.
Conduct investigations, analyze the causes of accidents, identify safety hazards, management loopholes and weak links, and propose accident prevention countermeasures and measures GB/T 45645 "Technical Guidelines for In-depth Investigation of Road Traffic Accidents" was formulated to scientifically construct a technical system for in-depth investigation of road traffic accidents.
It is of great significance to improve the standardization and scientificity of in-depth investigation of road traffic accidents.
The general principles of in-depth accident investigation, key elements of investigation content and methods, and requirements for comprehensive accident reconstruction and cause analysis are planned to be divided into seven parts. composition.
— Part 1: General. The purpose is to establish the overall requirements for in-depth investigation of road traffic accidents.
— Part 2: Personnel factor investigation. The purpose is to establish the content, methods and requirements of in-depth investigation of personnel factors.
— Part 3: Vehicle element survey. The purpose is to establish the content, methods and requirements of in-depth survey of vehicle elements.
— Part 4: Road element survey. The purpose is to establish the content, methods and requirements of in-depth road element survey.
— Part 5: Management and law enforcement elements survey. The purpose is to establish the content, methods and Require.
— Part 6: Investigation of emergency response and rescue elements. The purpose is to establish the content, methods and Require.
— Part 7: Comprehensive reconstruction of accidents and cause analysis. The purpose is to establish the methods and requirements for comprehensive reconstruction of accidents and cause analysis.
Technical Guidelines for In-depth Investigation of Road Traffic Accidents Part 1: General
1 Scope
This document defines the terms and definitions of in-depth investigation of road traffic accidents, gives the basic principles of in-depth investigation of road traffic accidents, and Provides guidance on survey analysis content and survey results.
This document is applicable to in-depth investigations of road traffic accidents.
2 Normative references
GB 5768
GB 7258
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Conduct investigations on personnel, vehicles, roads, management and law enforcement, emergency response and rescue factors involved in road traffic accidents, and analyze the causes of the accidents.
A technical activity that finds safety hazards, management loopholes and weak links, and proposes accident prevention countermeasures and measures.
3.2 Technical activities
Objectively restore the key elements and accident processes of road traffic accidents by using 3D modeling, computer simulation and other technical methods.
4 Basic Principles
4.1 Scope of the survey
A thorough investigation of road traffic accidents that cause casualties should be conducted;
For road traffic accidents with adverse social impacts and any of the following circumstances, an in-depth investigation of the road traffic accident should be conducted.
a) Involving road passenger vehicles, dangerous goods transport vehicles, semi-trailer tractors, heavy trucks, and vehicles transporting students Road traffic accidents;
b) The occurrence of the accident may be related to road traffic accidents that are not in compliance with laws, regulations, technical standards or specifications in vehicle production and sales;
......
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 5768
Editions of GB/T 45645.1
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 45645.1-2025 | Technical guidelines for in-depth investigation of road traffic accidents - Part 1: General principles | current edition | Current |
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