UN R13 Supplement 6 (12 series) · UNECE Regulation No. 13 (ECE R13) — Uniform provisions concerning the approval of vehicles of categories M, N and O with regard to braking.
UN R13 — Supplement 6 to the 12 series of amendments
Supplement 5 → 6
- What changed
- This supplement changes the wording of Annex 4, paragraph 2.3.2. on the parking braking of a combination of vehicles on a 12 per cent gradient.
- The paragraph now says “power-driven vehicles”, “a trailer / multiple trailers”, “the power-driven vehicle” and “the laden combination of vehicles”.
- Why
- The Russian Federation proposed to insert in the 12, 13 and 14 series provisions similar to those of Supplement 18 to the 11 series.
Q1What changed1 change
Parking braking of a laden combination of vehicles on a 12 per cent gradient (Annex 4, para. 2.3.2.)
Annex 4, paragraph 2.3.2. applies to power-driven vehicles to which the coupling of a trailer / multiple trailers is authorized. The parking braking system of the power-driven vehicle must be capable of holding the laden combination stationary on a 12 per cent up or down-gradient. Before, the paragraph said “vehicles” instead of “power-driven vehicles” and “a trailer” instead of “a trailer / multiple trailers”. It also said “the towing vehicle” instead of “the power-driven vehicle” and “the combination of vehicles” without the word “laden”. The 12 per cent up or down-gradient did not change.
Q2Why it changed
- Proposed by
- Expert from the Russian Federation
- Working party
- GRVA, 20th session (September 2024)
Reasons
The representative of the Russian Federation recalled the purpose of Supplement 18 to the 11 series of amendments to UN Regulation No. 13. He proposed that similar provisions be inserted in the 12, 13 and 14 series of amendments.
Source
“The representative of the Russian Federation recalled the purpose of Supplement 18 to the 11 series of amendments to UN Regulation No. 13. He proposed (GRVA-20-33) that similar provisions be inserted in the 12, 13, and 14 series of amendments.”
Document trail
- —ProposalGRVA-20-33Proposal by the expert from the Russian Federation
- —Working party adoptsECE/TRANS/WP.29/GRVA/20GRVA session report, para. 97
- 2024-12Sent to WP.29ECE/TRANS/WP.29/2025/9Text that GRVA sent to WP.29 and AC.1
- 2025-03WP.29 adoptsECE/TRANS/WP.29/1184Adopted at the 195th session (session report, para. 109)
- 2025-09-26In forceC.N.503.2025.TREATIES-XI.B.16.13UN depositary notification
Q3Who is affected
Vehicle manufacturer
- Compare your parking braking documents for vehicle combinations with the new text of Annex 4, paragraph 2.3.2.
- For power-driven vehicles authorized to couple trailers, test parking braking to Annex 4, paragraph 2.3.2. with the laden combination.
Component supplier
- Check that your parking brake specifications for power-driven vehicles cover the laden combination of vehicles in Annex 4, paragraph 2.3.2.
Technical service / Approval authority
- When you test the parking braking of a combination of vehicles under Annex 4, paragraph 2.3.2., use the laden combination.
- Compare your test and assessment documents for parking braking with the new text of Annex 4, paragraph 2.3.2.
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ⓘ This report gives advice only. It is not legal or type-approval advice.
More UN R13 change reports
- 15 series — Supplement 3
- 15 series — Supplement 2
- 15 series — Supplement 1
- 15 series — Base text
- 14 series — Supplement 4
- 14 series — Supplement 3
- 14 series — Supplement 2
- 14 series — Supplement 1
- 14 series — Base text
- 13 series — Supplement 7
- 13 series — Supplement 6
- 13 series — Supplement 5
- 13 series — Supplement 4
- 13 series — Supplement 3
- 13 series — Supplement 2
- 13 series — Supplement 1
- 13 series — Base text
- 12 series — Supplement 9
- 12 series — Supplement 8
- 12 series — Supplement 7
- 12 series — Supplement 5
- 12 series — Supplement 4
- 12 series — Supplement 3
- 12 series — Supplement 2
- 12 series — Supplement 1
- 12 series — Base text
- 11 series — Supplement 23
- 11 series — Supplement 22
- 11 series — Supplement 21
- 11 series — Supplement 20
- 11 series — Supplement 19
- 11 series — Supplement 18
- 11 series — Supplement 17
- 11 series — Supplement 16