Proposal to exempt CSF and ESC from prohibition on use of Advanced Driver Assistance Steering Systems while an ADS feature is active.

Proposal replaces document GRBP/2025/20

By this proposal all types of electric vehicles (xEVs) are included in the provisions of ASEP (Annex 7) in UN Regulation No. 51. If applicable, input of the dedicated subgroup of IWG RD-ASEP has been incorporated.

Proposal to make a correction to the procedure of free rolling tyre noise testing described in Annex 8.

Supplement 7 introduced an inconsistency in R51.03 Annex 8. As currently
written, it requires free-rolling tyre noise testing to be conducted in
accordance with both ISO 362-3:2016 and Annex 3, Appendix 3

Proposal to replace references to UN GTR 21 by its type-approval equivalent UN R177, provide transitional provisions pursuant to amendments introduced in Supplements 10 and 11, and clarify calibration provisions and procedure for system check (cf: ISO 362).

Proposal to cover all types of electric vehicles (xEVs) in the provisions of ASEP (Annex 7) in UN Regulation No. 51.

Proposal to replace references to GTR 21 by references to UN R177.

Proposal to address electric vehicle enhanced sound issues in the short term until the new 04 series of amendments enters into force.

Comments on the proposal to delete the 2m width requirement for parking lamps.

Proposal to clarify provision that direction-indicator lamps on one side of a vehicle shall be switched ON and OFF automatically.

Proposal to amend the proposals concerning manufacturer logos.

Proposal to delete the 2m width requirement for parking lamps.

Proposal to permit the installation of an optional rear-mounted manoeuvring lamp.

Proposal to prohibit the inclusion of a manufacturer logo in headlamps under UN R149 and to limit the approval of light-signalling devices with a logo to the 01 series of amendment of UN R149 under UN R48.

Proposal to clarify the requirements for the activation of direction-indicator lamps to ensure compatibility with driver control assistance systems as permitted under UN Regulation No. 171.

Review on the possible direction
(1) new series of amendment
(2)single series structure

Calibration of measurement equipment to PN10 measures more particles than calibration to PN23. It is therefore logical that compliance with a limit when measured according to PN10 demonstrates compliance with the same limit according to PN23 but this text should be added for legal certainty.

Proposal to introduce optional calculation method for determining f₀ and f₂ road load coefficients, allow measurement of drivetrain delta on component dynamometer, permit evaluation of split runs to increase data base, and enable test vehicle configuration using interpolation method. The calculation method determines final f₀ and f₂ values considering theoretical delta between coast down vehicle and final vehicle. Component dynamometer measurement increases accuracy because not all combinations of road load relevant components can be assembled, allowing all component combinations to be evaluated independently.

Proposal concerning the approval of the wind tunnel facilities.

Proposal to bring clarity in the text relating to On-Board Diagnostics (OBD).

Proposal to amend UN R83 by deleting Annex 1, paragraph 3.4.3. and renumbering paragraphs 3.4.3.1., 3.4.3.1.1., 3.4.3.1.2. and 3.4.3.1.3. to read 3.4.3., 3.4.3.1., 3.4.3.2. and 3.4.3.3., and deleting Annex 2, paragraph 1.9.2. The concept of “Operating Mode Switch” has been removed from the Regulation and these two paragraphs were omitted from this removal and should be deleted from both the manufacturer’s information document and the addendum to the approval certificate.

Proposal on the clarification for the definition of vehicle types and families.

Proposal for amendments to include OBFCM provisions

Proposal to amend ECE/TRANS/WP.29/GRPE/2025/18