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

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

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

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

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

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.

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.

Chronological summary of work on the draft ADS regulations.

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

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

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

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.