Document ID: chunk:federal_register_of_legislation:F2025C00110:reg:2:p3
Version: federal_register_of_legislation:F2025C00110
Segment Type: reg
Provision Reference: reg 2 (pt 3/22)
Character Range: 20448–23401

The intention of this Regulation is to establish uniform provisions for Advanced Emergency Braking Systems (AEBS) fitted to motor vehicles of the categories M2, M3, N2 and N31 primarily used under monotonous highway driving conditions.

       While, in general, those vehicle categories will benefit from the fitment of an AEBS, there are sub-groups where the benefit is rather uncertain because they are primarily used in other conditions than highway conditions (e.g. buses with standing passengers i.e. Classes I, II and A1, category G vehicles1, construction vehicles, etc.). Regardless from the benefit, there are other sub-groups where the installation of AEBS would be technically difficult or not feasible (e.g. position of the sensor on vehicles of category G1, construction vehicles mainly used in off-road areas and gravel tracks, special purpose vehicles and vehicles with front mounted equipment, etc.). In some cases there may be a possibility of false emergency braking events because of vehicle design constraints.

       In addition, systems intended for vehicles not equipped with a pneumatic rear-axle suspension require the integration of advanced sensor technology to take into account the variation of the pitch angle of the vehicle.

       The system shall automatically detect a potential forward collision, provide the driver with a warning and activate the vehicle braking system to decelerate the vehicle with the purpose of avoiding or mitigating the severity of a collision in the event that the driver does not respond to the warning.

       The system shall only operate in driving situations where braking will avoid or mitigate the severity of an accident, and shall take no action in normal driving situations.

       In the case of a failure in the system, the safe operation of the vehicle shall not be endangered.

       The system shall provide as a minimum an acoustic or haptic warning, which may also be a sharp deceleration, so that an inattentive driver is made aware of a critical situation.

       During any action taken by the system (the warning and emergency braking phases), the driver can, at any time through a conscious action, e.g. by a steering action or an accelerator kick-down, take control and override the system.

       The Regulation cannot include all the traffic conditions and infrastructure features in the type-approval process. Actual conditions and features in the real world should not result in false warnings or false braking to the extent that they encourage the driver to switch the system off.

              1.  Scope and purpose
              This Regulation applies to the approval of vehicles of category M2, N2, M3 and N31 with regard to an on-board system to avoid or mitigate the severity of a rear-end in lane collision.

              2.  Definitions
              2.1. "Advanced Emergency Braking System (AEBS)" means a system which can automatically detect a