Correction to an error in paragraph 5.2. of the original proposal.

Proposal to correct an erroneous table reference.

Proposal to include provisions for the approval of ACPE for vehicles of Category N1 and to introduce additional performance requirements for additional scenarios.

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

Proposal for amendments) Proposal to mitigate the risk of decreasing trailer brake performance caused by brake pads and linings “falling asleep”.

Proposal to mitigate risks of decreasing trailer brake performance caused by brake pads and linings “falling asleep”.

Proposal for amendments) Proposal to mitigate the risks of decreasing trailer brake performance caused by brake pads and linings “falling asleep”.

Proposal to improve terminology concerning the status of the ACSF system following an “engine start / run cycle” and to clarify provisions for full power steering systems such as steer-by-wire systems.

Proposal to improve terminology concerning the status of the system following an “engine start / run cycle” and to clarify provisions for full power steering systems such as steer-by-wire systems.

Proposal on terminology about the status of the system following an “engine start / run cycle”.

Proposal for terminology about the status of the system following an “engine start / run cycle”, to limit regular lane changes to roads “where it is possible to assess and handle the speed of an approaching vehicle” and to restrict lane changes by heavy vehicles (M₃ and N₃) to roads where the maximum permissible speed of target lane is “limited for all vehicle categories”, and to simplify the original text.

Proposal for improvements to the text.

Proposal to

1. Update the RD-ASEP limit line following the revisions of the test procedures implemented by the 05 series of amendments,
2. Clarify the application of the Annex 7 ASEP testing conditions of motorcycles,
3. Strengthen provisions against test defeating,
4. Facilitate Conformity of Production testing, and
5. Correct the communication document.

Proposal to allow the use of the test track as specified in ISO 10844:2021.

Proposal to:

1. Update reference to ISO 4000-1:2024 (published in March 2024)
2. Clarify the structure indication within the tyre size designation for run flat or self-supporting tyres suitable for speeds in excess of 240 km/h (inscription “ZRF”)
3. Clarify the nominal rim diameter.
4. Amend the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators.
5. Introduce definition of tread depth (used in the requirements for special use and professional off-road tyres)
6. Clarify the calculation of tyre section width
7. Claify the D_max requirement for snow tyres.

Proposal to strengthen provisions against test defeating and to facilitate Conformity of Production testing.

Proposal to

1. Clarify the application of the Annex 7 ASEP testing conditions of motorcycles,
2. Strengthen provisions against test defeating,
3. Facilitate Conformity of Production testing, and
4. Correct the communication document.

Proposal to

1. Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 1
2. Make editorial corrections to the type of tyre and additional service description definitions
3. Clarify the definition of nominal rim diameter (in line with the proposal for amending UN R30)
4. Amend the definition of principal grooves (in line with the proposal for amending UN R30
5. Introduce a definition for tread depth (used in the requirements for special use and professional off-road tyres)
6. Introduce definition for free rolling tyre and front axle, and related revision of markings (ref. GRBP-80-03 and GRBP-80-26)
7. Clarify the D_max requirement for snow tyres
8. Simplify rhz wording of the requirements for professional off-road tyres
9. Add an indication for whether a special use tyre is a professional off-road tyre to the communication form (in line with UN R30).

Proposal to

1. Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 5.
2. align the categories of use to “normal tyre”, “snow tyre” and “specialuse tyre” in line with UN R30 and 54, to introduce a definition of “normal
   tyre” and consequently make use of the terms “snow tyre” and “special-use tyre” that are already defined
3. reformat Annex 5, Table 7 to present the tyre-size designations in a consistent way and to provide explicitly that tyre-size designations from this table may also be used for tyres in bias-beltedvstructure
4. Include the suffix “M/C” that is defined as mandatory for motor-cycle tyres with rim diameter code 13 and above in the figure illustrating the sidewall markings in Annex 3 and to present the markings in a clearer way
5. Add provisions for the dimensional requirements of moped tyres
6. Add a factor for the centrifugal radius of snow tyres and special-use tyres with a speed category above 210 km/h
7. Give the footnotes in the main body of the regulation an unequivocal number to avoid confusion when referencing to a particular footnote
8. Include several editorial corrections to increase the consistency of the text (e.g. consistent use of the terms defined in section 2, such as “tyre-size designation”, “load-capacity index”, “speed-category symbol”).

Proposal to:

1. Correct the description of a tyre to exclude aspects outside the scope of UN R108
2. Align the snow tyre definition to UN R109 and 172
3. Clarify the definition of nominal rim diameter
4. Clarify the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators
5. Introduce a definition for tread depth (used in the requirements for special use and professional off-road tyres)
6. Amend para. 4.1.5.3.2. to remove the retreaded reference to traction tyre classification because it is not applicable to tyre of class C1
7. Clarify the calculation of the tyre section width
8. Replace “XXX” with the UN Regulation No. 172 in the references to the approval of retreaded tyres with regard to their snow performance and/or classification as traction tyre.</li<
9. Correct an omission
10. Clarify the text of Annex 3: The positioning and order of the markings shall be as follows:….

Proposal to:

1. Correct the description of a tyre to exclude aspects outside the scope of UN R109


2. Clarify the definition of nominal rim diameter


3. Clarify the definition of principal grooves in line with the proposal for UN R54


4. Amend para. 6.4.4.2. to clarify that the UN R117 certificate may be used for obtaining the type approval under UN R172 of retreaded tyres classified as traction tyre


5. Simplify the wording of the requirements for professional off-road tyres


6. Replace “XXX” with the UN Regulation No. 172 in the references to the approval of retreaded tyres with regard to their snow performance and/or classification as traction tyre.

Proposal to

1. Update standard reference to ASTM F2493-24 and ISO 4000-1:2024
2. Align the definitions of tread groove and principal grooves with proposals for UN R30 and R54
3. Simplify the wording of the requirements for professional off-road tyres
4. Correct the transitional provision in paragraph 12.23. to specify approvals “first issued after 31 August 2028”.

Proposal to standardize provisions for the water depth measurement, reduce the track friction range requirements under the test procedures, clarfy that adhesion performance on wet surfaces (wet adhesion) is required not only for C1 tyres, but also C2 and C3 tyres, update the standards references to ASTM F2493-244, F3611-24, F3676-24, F3675-24 and ISO 4000-1:2024, align the definitions of tread groove and principal grooves with proposals for UN R30 and R54, simplify the wording of the requirements for professional off-road tyres, and correct the transitional provision in paragraph 12.23. to specify approvals “first issued after 31 August 2028”.

Proposal to:

1. Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 1
2. Align title of para. 5 with its contents (paras. 5.1. and 5.2.)
Align the title of para. 6 with corresponding paras. in UN R30, 54, 75, 106 and 117
3. Clarify that all temporary use spare units can by composed by using tyres of any category of use
4. Align the snow tyre definition with UN R30, 54 and 117
5. Clarify that tyres for use in severe snow conditions are also applicable to the category of use ‘special use tyres’
6. Clarify which service conditions can apply the coefficient given in paragraphs 5.2.4.3.1. and 5.2.4.3.2.
7. Add Class C3 tyres to the speed category symbol and load capacity index definitions
8. Introduce definitions of free rolling tyre and front axle and revise markings accordingly (ref. documents GRBP-80-03 and GRBP-80-26)
9. Clarify reporting the name of the symbols used for tyre for use in severe snow conditions in line with UN R117 and 164.

Proposal to:

1. Add new reference tyres C3 SRTTs 19.5 and 22.5 siped and related transitional provisions
2. Simplify the wording of the requirements for
   professional off-road tyres
3. Make editorial corrections where needed throughout the text.

Proposal to transpose EU Regulation 2021/64 on emergency lane-keeping systems into a new regulation under the 1958 Agreement on the mutual recognition of type approvals.

Proposal to update the references to the three-dimensional H-point (3-D “H”-point) measurement and calibration procedure pursuant to the update of the device specifications and transfer from the Consolidated Resolution on the Construction of Vehicles (R.E.3) to Mutual Resolution No. 1 (M.R.1).

Proposal to update the references to the three-dimensional H-point (3-D “H”-point) measurement and calibration procedure (per the updates and transfer of device specifications from the Consolidated Resolution on the Construction of Vehicles (R.E.3) to Mutual Resolution No. 1 (M.R.1)).

Proposal from the Particle Measurement Programme informal group to improve the text and test protocol.

Proposal to improve terminology concerning the status of the AEBS following an “engine start/run cycle”.

Proposal to improve terminology concerning the status of the AEBS following an "engine start / run cycle”.

roposal to improve terminology concerning the status of the AEBS following an “engine start / run cycle”.

Proposal to improve terminology concerning the status of the AEBS following an “engine start / run cycle”.
Add related document

Proposal to maintain consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.

Proposal to introduce new provisions to accommodate type-approval of hydrogen Type 1A dual fuel engines and vehicles, modifications to include Fourier Transform Infrared (FTIR) and Quantum Cascade Laser (QCL) instruments, new provisions to accommodate monitoring on-board fuel and/or energy consumption during PEMS testing, and to amend for consistency between UN R49 and UN R83 in light of amendments to the 06 and 07 series of UN R83.

Proposal to update requirements for dynamometer preparation before a Type 6 test by aligning UN R83 with the relevant text of Annex 13 of GTR 15.

Proposal to update requirements for dynamometer preparation before a Type 6 test by aligning UN R83 with the relevant text of Annex 13 of GTR 15 and to allow the type approval of vehicles that previously were only within the scope as an extension based on their reference mass.

Proposal to update requirements for dynamometer preparation before a Type 6 test by aligning UN R83 with the relevant text of Annex 13 of GTR 15 and to allow the type approval of vehicles that previously were only within the scope as an extension based on their reference mass.

Proposal to update requirements for dynamometer preparation before a Type 6 test by aligning UN R83 with the relevant text of Annex 13 of GTR 15, to add engine capacity to the information document and to make editorial corrections.

Consolidated revision to make corrections, clarifications and improvements that have already been introduced into the 02 and 03 series of amendments of UN R154. The proposal is based on document GRPE/2024/2, GRPE-90-11-Rev.1, and GRPE-91-11 PEV run-in provisions only). Proposal to align the manufacturer information document with the type-approval certificate, adapt the calibration of measurement equipment to PN10 (which measures more particles than PN23), and clarify that compliance when measured according to PN10 demonstrates compliance with the same limit according to PN23.

Proposal to align the manufacturer information document with the type-approval certificate, make corrections, clarifications and improvements that have already been introduced into the 02 and 03 series of amendments of UN R154, and clarify that compliance with a limit measured according to PN10 demonstrates compliance with the same limit according to PN23.

Proposal to amend additive deterioration factors and the PEV run-in requirement, to align the manufacturer information document with the type-approval certificate, to clarify that compliance with a limit when measured according to PN10 demonstrates compliance with the same limit according to PN23, and to effect corrections and editorial improvements.

Proposal to align the manufacturer information document with the type-approval
certificate and to clarify that compliance with a limit measured according to PN10 demonstrates compliance with the same limit according to PN23.