This document amends the formal proposal in document GRVA/2023/9.

Proposal to clarify the application of the proposed changes with regard to electro-mechanical braking.

Proposal for editorial improvements for clarity and consistency across regulations.

Proposal to clarify the wording on "“initiation of each engine start/run cycle” relative to automatic re-instatement of the AEBS default status.

Proposal to clarify the wording concerning automatic re-instatement of the AEBS default status at the “initiation of each engine start/run cycle”.

Proposal to allow a mechanical locking device as an alternative to the friction parking braking to hold the vehicle.

Proposal to allow a mechanical locking device as an alternative to the friction parking braking to hold the vehicle.

Proposal to amend provisions concerning full power steering to address technological advances such as steer-by-wire systems.

Proposal to clarify provisions on Automatically Commanded Steering Function (ACSF) of category A.

Proposal for amendments to the proposal to permit the use of a positive lock type system as an alternative to a friction type parking brake system.

Proposal to amend the proposal to permit the use of a positive lock type system as an alternative to a friction type parking braking system.

Proposal to permit the type approval of a park lock device as an alternative to the friction parking brake(s).

Proposal to permit the type approval of a park lock device as an alternative to the friction parking brake(s).

Proposal for amendments to the draft provisions on e-trailers.

Proposal to address loss of trailer friction braking efficiency due to increased use of robust endurance braking systems and electrification of trucks. The number of trucks with strong endurance braking systems and increasing electrification of vehicles with more efficient energy recuperating systems reduces the use of friction brakes. As a result, brake pads and linings in some commercial vehicles do not reach a temperature that is needed for the development of optimum brake performance. In particular in trailers, a loss of brake force develops due to brake pads and linings losing effectiveness – they “fall asleep” and need to be replaced although they are not worn out.

Proposal to amend provisions in documents GRVA/2025/13 and GRVA/2025/14 concerning the type approval of a park lock device as an alternative to or in combination with the friction parking braking.

Proposal to amend para. 2.2.2.4. to include electric regenerative braking system and electric propulsion system, amend para. 2.21. to define Electric Regenerative Braking (ERB), add para. 2.56. to define e-trailer, amend para. 5.2.2.7. regarding braking surface connection and electrical regenerative braking system disconnection, insert para. 5.2.2.26. establishing special requirements for e-trailers and trailers equipped with ERB of Category O₃ or O₄, insert Annex 4 paras. 1.7.1.3., 3.1.2.6., and 3.1.3.5. requiring ERB system deactivation during brake applications and tests, insert Annex 13 para. 4.7. requiring anti-lock braking system for vehicles with ERB, and amend Annex 16 tables to include trailer regenerative system parameters, based on GRVA/2025/15.

Proposal to resolve the problem of decreasing trailer brake performance caused by brake pads and linings “falling asleep”.

Proposal to clarify that an Emergency Stop Signal may be generated by application of the service braking system via the Electronic Parking Brake.

Proposal to improve usability, especially in enabling user targeting of the stopping point of the vehicle.