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 simplify the original text.

Proposal to introduce new vehicle categories to address certain ADS vehicle configurations.

Proposal to introduce new supplemental vehicle categories X and Y concerning ADS vehicles.

Proposal to extend the scope to include N₁ category vehicles.

Proposal to align the original text with the 01 series of amendments concerning initialisation: “If [the] ACPE is not ready to perform an intervention 6 s after the initiation of the vehicle powertrain, information of this status shall be indicated to the driver. This information shall exist until the system has been successfully
initialised.”

Proposal for revised terms to include the development of a GTR on ACPE.

Proposal to add ISO/IEC 17021:2017 for the audit and certification
of management systems to Part 2 of Schedule 2 on “Standards which the technical services, referred to in Part one of this Schedule, shall comply with”.

Proposal to update provisions concerning implementation of RxSWIN software identification numbers.

Draft proposal for amendments and clarifications, especially to address the applicability of the regulation to ADS vehicles, submitted by the FADS task force for information pending finalisation.

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 resolve issues with accepting the approval of M₂, M₃ and N₂ vehicles to R152.

Proposal to clarify requirements in the scope relevant to mutual recognition and UN R131 (Advanced Emergency Braking Systems (AEBS).

Proposal to resolve inconsistency between information required on the communication form of R90 compared to other UN Regulations.

Proposal to cleanse the document with regard to reference to system-initiated manoeuvres to avoid misinterpretation.

Proposal from the FADS task force to update the text for application to certain ADS vehicles.

Proposal to ensure that vehicles exhibiting functionality meeting the definition of ACSF-B2 or -E are required to comply with the 01 series of R171 (or later). The 01 series added the necessary technical requirements to ensure the safety of features that allow ‘hands-free’ operation or perform system-initiated manoeuvres.

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

Proposal to insert initialisation provision: “If ACPE is not ready to perform an intervention 6 s after the initiation of the vehicle powertrain, information of this status shall be indicated to the driver. This information shall exist until the system has been successfully initialised.”

Proposal to remove references to system-initiated manoeuvres (SIM) to reduce risks of misinterpretation of the regulation. The approval of SIM has not yet been proposed by the ADAS task force.

Proposal to establish a guidance on the use of the UN secure internet database “DETA” for the exchange of information on incidents related to DCAS operation between Type Approval Authorities.

Proposal to introduce an Annex 6 providing guidance on the use of the DETA internet database for the exchange of information on incidents related to DCAS operation between Type Approval Authorities.

Proposal from the task force on Automated Vehicle Categorisation (AVC) to amend the Resolution on vehicle construction for application to ADS vehicles, including the introduction of new vehicle subcategories X and Y.

Proposal from the task force on Automated Vehicle Categorisation (AVC) to amend the Resolution on vehicle categories for application to ADS vehicles, including the introduction of new subcategories X and Y.

Proposal to enable the type-approval of ADS vehicles, including those without manual controls.

Proposal to enable the type-approval of ADS vehicles, including those without manual controls.

Proposal to enable the type approval of automated vehicles, including those without manual controls.

Proposal improve consistency in the bedding/burnishing procedure and to align the Communication Form with that of other UN Regulations.

Pursuant to changing the application of the Unique Identifier (UI) under the 1958 Agreement, this proposal deletes the prohibition on use of the UI for replacement brake components under UN R90. Originally, the UI was applied by default to all UN Regulations which therefore required certain regulations to prohibit its use. Pursuant to the adopted proposal WP.29/2025/17, each regulation grants permission to use the UI so the provision prohibiting use under UN R90 is no longer needed.

Proposal to require technical services performing audits and certification of management systems under UN Regulations to comply with ISO/IEC 17021:2015.

Proposal to ensure that vehicles exhibiting functionality meeting the definition of ACSF-B2 or -E are required to comply with the correct series of R171.

Proposal to clarify that the use of any braking system control for testing the effectiveness of the secondary braking system in failure conditions is allowed.

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

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 enable the use of virtual testing as an alternative to physical testing.

Chronological summary of work on the draft ADS regulations.

Proposal to enable application of SR1 to ADS vehicles and introduce provisions for vehicle subcategories X and Y.

Proposal to amend RE3 to enable application to ADS vehicles and to introduce vehicle subcategories X and Y.

Discussion and proposal to consider countermeasures to prevent “dooring” collisions.

Proposal to add definitions for “e-axle”, “e-axle trailer”, and “dynamo function” for trailers of category O₃ and O₄, amend paragraph 2.2.2.4. to reference electric regenerative braking systems and electric propulsion systems, insert new paragraphs 5.2.2.26.1. through 5.2.2.26.5. establishing special requirements for dynamo function including maximum retardation power of 20kW, wheel locking prevention at speeds above 15 km/h, and assessment according to Annex 18, insert requirements in Annex 4 to switch off electric regenerative braking systems and dynamo function during brake applications and tests, and amend Annex 19 Appendices 5 and 7 to include e-Axles in schematic diagram considerations. This document is based on GRVA/2025/15 and GRVA-21-12.

The Task Force on regulatory Fitness for Automated Driving Systems reports proposed amendments to UN R13, R13-H, and R79. Amendments to R13 and R13-H, submitted as GRVA/2025/24 and GRVA/2025/25, include general clarifications, relaxed manual control requirements for vehicles of categories X and Y, clarification of braking system warning transmission to the ADS, and ESC compatibility provisions. R79 amendments, submitted as GRVA/2025/23, establish baseline manual control requirements for X and Y vehicles, remote control capabilities, ADS steering equipment requirements, and remove ALKS exemptions. Transitional provisions apply. The task force coordinates with other expert groups on horizontal topics and continues amending additional UN Regulations.

Proposal to align the wording on “initiation of the powertrain” with MR2.

Proposal to align the text with MR2 for initiation of the power train

Proposal to require technical services performing audits and certification of management systems under UN Regulations to comply with ISO/IEC 17021:2015.

Proposal to enable real-time reading of electrical transmission brake values during periodical technical inspections.

Proposal to enable real-time reading of electrical transmission brake demand values via an OBD connector and scan tool during periodical technical inspections.

Proposal to align UN R130 with the harmonised wording approved by WP.29 with regard to conditions for automatic reinstatement of a system at the “initiation of each engine start/run cycle”.

Proposal from the FADS informal working group to enable the type approval of ADS vehicles, including those without manual controls.

Proposal from the FADS informal group to introduce amendments to enable the type approval of ADS vehicles, including those without manual controls.

Proposal from the FADS informal group to introduce amendments to enable the application of UN R13 to automated vehicles, including those without manual controls.

Proposal to require require manufacturers to provide a method for objectively determining the moment of “Risk Mitigation Function” (RMF) initiation to enable assessment of the RMF warning signals and other driver warnings, hazard lights, and indicators in relation to the objectively determined RMF initiation point.

Proposal to reinstate the obligation for the granting approval authority to inform corresponding authorities of other Contracting Parties before issuing an approval for an ALKS intended to operate within those corresponding markets, including evidence of ALKS competency to comply with the prevailing traffic rules (in accordance with Annex 1-Appendix 2).

Proposal from the FADS task force to amend its proposal to enable the application of UN R79 to ADS vehicles.

Proposal from the FADS task force to amend its proposal to enable the application of UN R13-H to ADS vehicles.

Proposal from the FADS informal group to amend its proposal to enable the application of UN R13 to automated vehicles, including those without manual controls.

Proposal to allow the driver to slow down the remote parking manoeuvre, including coming to a stop, earlier than intended by the system.

Proposal to introduce transitional provisions pursuant to the adoption of Supplements by W.29 that inadvertently included changes to the approval requirements.

Proposal to clarify that only one braking control (e.g., service braking control, parking brake control) shall be used for each test condition of the secondary braking effectiveness and to permit the selection of the braking control based on the vehicle load condition.

Proposal to clarify that the Emergency Stop Signal (ESS) may be generated by application of the service braking system via the Electronic Parking Brake (EPB) control.

Proposals to improve the text related to terminology across propulsion types (e.g., use of term “powertrain”) pursuant to similar improvements agreed via documents WP.20/2025/87 and 90.

Proposal from the CS/OTA informal group to update the interpretation document pursuant to amendments introduced via the 01 series of amendments to UN R156.

Proposal to introduce provisions for implementing the option (contained in footnote) for approval of certain “medium-duty” vehicles either under UN R152 (M₁/N₁) or UN R131 (M₂/N₂ /M₃). The proposal aims to clarify terms and establish procedures for demonstrating equivalent performance.

Proposal to increase the usability and safety of the system and to ensure that the technical requirements reflect the latest system capabilities.

Proposal to include information in the test report to identify the specific software installed on the vehicle(s) used for compliance testing under UN Regulations.

Proposal to update the declaration of compliance and Certificate of Compliance models to communicate the relevant series of amendments to ensure alignment between the management systems and the corresponding requirements of UN R156.

Proposal to clarify that the tolerance for the speed of the pedestrian dummy crossing the vehicle path is 0.4 km/h across all the series of amendments.

This document proposes amendments to UN Regulation 13 for trailers with dynamo function, superseding GRVA-22-26, GRVA-2025-15, and GRVA-21-12. The dynamo function converts vehicle kinetic energy into electrical energy without affecting braking system forces and is limited to trailers of category O₂, O₃, and O₄ pending further development. Maximum retardation power limits are 22 kW for O₃/O₄ trailers and 2 kW for O₂ trailers, measured using specified methods. Requirements include wheel locking prevention with braking rate not exceeding 0.04 per wheel, functional safety assessment per Annex 18, and demonstration that anti-lock and stability control systems comply when dynamo function is enabled. The dynamo function shall not be used during brake application testing. Administrative amendments update Annexes 2, 4, 5, 10, 19, 20, and 21 to reference e-axles and dynamo functions.

Proposals to resolve issues with accepting the approval of M₂, M₃ and N₂ vehicles to Regulation No. 152.

Proposal from OICA, CLEPA, and CITA to amend CITA’s proposal to enable real-time reading of electrical transmission brake demand values via an electronic vehicle interface and an off-board electronic device during periodical technical inspections, including a 24-month transitional period.

Proposal to establish definitions for “e-axle”, “e-axle trailer” and “dynamo function” and to establish provisions for the approval of e-axle trailers with regard to their “dynamo function”.

Proposal for amendments to the 05 series of UN R79 to enable the type approval of ADS vehicles, including those without manual controls.

Proposals to resolve issues with accepting the approval of M₂, M₃ and N₂ vehicles to Regulation No. 152.

Proposal to require require manufacturers to provide a method for objectively determining the moment of “Risk Mitigation Function” (RMF) initiation to enable assessment of the RMF warning signals and other driver warnings, hazard lights, and indicators in relation to the objectively determined RMF initiation point.

Proposal to update the declaration of compliance and the certificate of compliance to identify the series of UN R156 under which the documents were issued.

Proposal to update the Interpretation Document to reflect provisions introduced by the 01 series of amendments to UN R156.

Proposal to modify UN R171 through the 02 series of amendments, based on WP.29/2025/7, WP.29-195-05, and WP.29/2025/144, introducing modifications addressing system-initiated manoeuvres in non-highway environments and during phases of withholding hands-on requests, enhanced driver disengagement monitoring and warning strategies, controllability requirements for complex operational scenarios, speed limit assistance features, safe headway assistance, system validation through multiple assessment pillars including physical tests and in-service monitoring, and comprehensive safety management system requirements for manufacturers. Additional specifications include monitoring of DCAS operation with mandatory reporting of safety-critical occurrences to Type Approval Authorities, periodic reporting requirements with specific data collection metrics, and software identification and updating compliance with UN R156.