GB/T 44461.1-2024Intelligent and connected vehicles - Technical requirements and test methods for combined driving assistance systems - Part 1: Single-lane driving control (English PDF)

1 Scope

GB/T 44461.1-2024 is the first part of the Chinese standard for combined driving assistance systems and it covers single-lane driving control: the level 2 function that holds the car in its lane and at a set distance from the vehicle ahead, sold under a hundred marketing names and meaning something slightly different in each. This standard is what fixes the meaning in China. It sets the technical requirements for the function, the operating conditions in which it must work and the boundary at which it must hand back, the driver monitoring and the hands-on requirements, the warning and takeover strategy and its escalation, the behaviour on system failure and on leaving the operational domain, the response to cut-in vehicles, to stationary obstacles and to lane markings of varying quality, and the human-machine interface requirements. It then gives the test methods, the track scenarios and the pass criteria for each. For a carmaker or a Tier 1 selling driving assistance into China, this is the text the function is assessed against.

This document specifies the general requirements and performance requirements and describes the test methods for the single-lane manoeuvre of intelligent and connected vehicles. This document is applicable to Category-M and Category-N vehicles equipped with single-lane manoeuvre system. NOTE. in the absence of confusion, the "single-lane manoeuvre system" in this document is referred to as the "system" in short.

2 Normative References

The contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB 5768.3 Road Traffic Signs and Markings - Part

3 Terms and Definitions

The terms and definitions defined in GB/T 44373, and the following are applicable to this document.

3.1 single-lane manoeuvre system A combined driver assistance system that continuously controls the lateral and longitudinal motion of the vehicle based on the surrounding driving environment and assists the driver in controlling the vehicle to drive only in a selected single lane.

3.2 lane A state, in which, the system does not perform any lateral or longitudinal motion control on the vehicle.

3.9 partial active state A state, in which, the system does not perform lateral and longitudinal motion control on the vehicle at the same time but assists the driver in performing lateral or longitudinal motion control.

3.10 active state A state, in which, the system assists the driver in continuously controlling the lateral and longitudinal motion of the vehicle.

4 General Requirements

4.1 Functional Requirements The system shall have clear activation conditions. In the active state, it shall assist the driver in controlling the vehicle to drive in the selected lane, and allow the driver to adjust settings, for example, cruising speed. In addition, it shall not affect the activation of emergency assistance functions, for example, automatic emergency braking.

4.2 Self-inspection The system shall complete self-inspection before entering the active state and be equipped with at least the following self-inspection functions. When an abnormal state is detected, it shall not enter the active state.

a) Check whether the relevant electrical components are normally operating;

b) Check whether the relevant sensing elements are normally operating.

Appendix A

(normative) Functional Safety Requirements A.1 Overview When vehicle safety-related electrical / electronic systems have a malfunction, it will lead to potentially harmful events. GB/T 34590 (all parts) clarifies the functional safety requirements that vehicle safety-related electrical / electronic systems need to comply with within the safety life cycle, so as to avoid or reduce risks caused by system malfunctions. The functional safety requirements of the single-lane manoeuvre system include requirements for documentation, verification and validation of functional concept and functional safety concept. They are not aimed at the nominal performance of the system, nor are they used as a specific guide for the functional safety development of the system. Instead, they are the methods followed during the design and the information available during system verification and validation, so as to prove that the system realizes the functional concept and functional safety concept in non-faulty and faulty states. A.2 Documentation A.2.1 Requirements Corresponding documentation shall be available to describe the functional concept of the system, the functional safety concept developed to achieve the safety objectives, as well as the safety strategy, the development process and methods, so as to demonstrate that the system.

a) Ensure that the system can realize the functional concept and functional safety concept in both non-faulty and faulty states through design;

b) The development process and methods are applicable. A.2.2 System description A.2.2.1 The functional concept of the system shall be described, that is, a list of purposes and functional descriptions. A.2.2.2 The scope of the system shall be defined, subsystems and elements shall be clarified, and external systems or elements with interactive relations shall be identified. A.2.2.3 The operating conditions and constraints of the system shall be defined, and the limits of the effective working scope shall be stated for the corresponding system functions. A.2.3 System layout and schematic diagram A.2.3.1 List of system components A list of components shall be provided, which shall include all component units of the system, and shall also list other vehicle systems required to achieve the relevant control functions. A system layout and schematic diagram shall be provided based on these component units, which shall clearly demonstrate the component distribution and interconnection. A.2.3.2 Unit functions The functions of each unit of the system shall be outlined, and the signal connections between this unit and other units or other vehicle systems shall be demonstrated. Marked block diagrams or other schematic diagrams may be used, or illustrations may be aided by diagrams. A.2.3.3 Interconnection Use circuit diagrams, piping diagrams and layout diagrams to respectively illustrate the interconnections of the electronic transmission chain, hydraulic transmission chain and mechanical connection devices within the system. A.2.3.4 Signal flow, operational data and priority order The transmission chain between units shall have clear corresponding relations with signals and operating data. If the priority order affects the performance or safety described in this document, the priority order of signals and operating data in the multiple data channels shall be determined. A.2.3.5 Unit identification Each unit shall be clearly and unambiguously identified (for example, identification of hardware, identification of software content or software output) and appropriate descriptions shall be provided. When a unit or a single processor that integrates multiple functions appears multiple times in the block diagram, for clarity and ease of explanation, only one hardware identification mark is used. Identification marks shall be used to confirm that the device provided is consistent with the corresponding documentation. The identification marks shall clearly indicate the version of the hardware and software. If the version change causes changes in the functions described in this document, the identification marks shall be changed accordingly. A.2.4 Hazard analysis and risk assessment The functional faults of the system shall be analyzed and classified. Hazard analysis and risk assessment at the vehicle level shall be carried out based on the target usage scenarios and target users of the vehicle under system control. In addition, the corresponding automotive safety integrity level (ASIL) and safety objectives shall be defined, 2) Abnormal functional performance; 3) Safety risks in the non-faulty state.

b) Safety analysis at the system level, which may adopt potential failure mode and effects analysis (FMEA), fault tree analysis (FTA) or other similar methods suitable for system safety analysis.

Note 1. 2. **Search (Optional).** Enter the keyword '**GB/T 44461.1-2024**' in the search bar, if it is not already shown. 3.

Note 2. 9.

Note 3. 10. **Verification (USD

Notes and Explanations

Note 1:**[GB/T 44461.1-2024](https://

Note 3:** If you are unable to redirect back to our Return Page, do not worry. **Additionally and independently**, our automated system will still deliver your PDF and Invoice via email **(the second mechanism to ensure the delivery)**, typically within 3 minutes. Once your payment is complete, you have two instant ways to access your PDF and invoice: you may stay on the Return Page for download in 3 minutes typically, or simply check your email inbox where a copy is automatically delivered in 3 minutes typically.