To enhance the active safety performance of light-duty vehicles in emergency situations and promote the standardized application of Advanced Emergency Braking Systems (AEBS), China’s Ministry of Industry and Information Technology (MIIT) has drafted a new mandatory national standard titled Technical Requirements and Test Methods for Advanced Emergency Braking Systems of Light-Duty Vehicles. This draft applies to M1 and N1 category vehicles and replaces the current recommended standard GB/T 39901—2021.
The draft for comments was publish on April 30, 2025 and the commenting period is 2 month, finishing on June 30 2025. If your clinets want to make comments, please contact us or make the comments directly to MIIT.
The revision was developed over three years by a project team comprising nearly 30 organizations, including OEMs, component suppliers, and third-party testing bodies. It is based on international regulations such as UN ECE R152 and R131, while incorporating findings from China’s In-Depth Traffic Accident Investigation (CIDAS) database and local vehicle use patterns, especially the high incidence of accidents involving two-wheeled vehicles.
The standard defines system states, functional and performance requirements, test methods, simulation tests, functional safety, and type conformity determination. Key provisions include:
Activation range: M1 vehicles must activate AEBS between 10–80 km/h and N1 vehicles between 10–60 km/h. Pedestrian, bicycle, and scooter detection is required within 20–60 km/h.
Warning signals: Systems must issue a warning at least 0.8 seconds before braking, using both visual and audible/tactile alerts.
Emergency braking performance: The system must achieve a maximum deceleration of 5.0 m/s² and comply with specific relative collision speed thresholds for various targets (stationary, moving, braking vehicles; pedestrians; cyclists; scooters).
System robustness: Pass rates must be at least 90% for vehicle and pedestrian scenarios, and 80% for two-wheeler scenarios.
System status management: AEBS must support multiple states (off, standby, active, unavailable, initializing), allow partial deactivation without degrading other functions, and automatically resume operation after ignition.
False response prevention: The system must avoid unnecessary alerts or braking in the absence of real collision threats, validated through physical and simulation tests.
Functional safety and EMC: The system must meet GB 34660 electromagnetic compatibility requirements and comply with documentation and testing requirements in Annex A to ensure safe operation even under fault conditions.
The standard defines comprehensive testing scenarios, including collisions with stationary, constant-speed, and decelerating targets, as well as pedestrians, cyclists, and scooter riders crossing paths. Special test conditions address China’s unique accident patterns, such as high night-time incidents and two-wheeler involvement. Simulation testing is incorporated to supplement physical tests, with detailed requirements for target design and data processing.
For type conformity, the standard outlines criteria across system configuration, functional safety, and electromagnetic compatibility. Over ten rounds of expert meetings were held, collecting over 1,000 comments, resulting in iterative revisions to key definitions, alert timing, partial deactivation rules, and robustness assessments.
Once officially published, the standard will include a transition period. New type approval applications must comply from the implementation date, while existing approvals will be granted a grace period. As a mandatory standard affecting safety and involving international regulatory deviations, the draft will also be notified through the WTO/TBT mechanism.
This standard is expected to unify AEBS technical requirements in China, strengthen the safety performance of light-duty vehicles, reduce traffic accidents—particularly those involving two-wheelers—and support harmonization with international regulatory frameworks.
In the period, there are other 6 mandatory standards call for comments and thay are
Technical Requirements and Test Methods for Braking Performance of Motorcycles and Mopeds (Draft for Comments)
Technical Requirements and Test Methods for Advanced Emergency Braking System of Light-Duty Vehicles (Draft for Comments)
Structural Safety Requirements for Buses (Draft for Comments)
Safety Technical Specifications for Dedicated School Buses (Draft for Comments)
Electromagnetic Compatibility Requirements and Test Methods for Road Vehicles (Draft for Comments)
Driver’s Forward Field of View Requirements and Measurement Methods for Light-Duty Vehicles (Draft for Comments)
If you want to get more information, please contact us.
