UN R152 Supplement 6 (02 series) · UNECE Regulation No. 152 (ECE R152) — Uniform provisions concerning the approval of motor vehicles with regard to the Advanced Emergency Braking System (AEBS) for M1 and N1 vehicles.
UN R152 — Supplement 6 to the 02 series of amendments
Supplement 5 → 6
- What changed
- The AEBS must be deactivated upon activation of an ADS feature and automatically reactivated upon deactivation of an ADS feature.
- New paragraph 1.2. says that this Regulation does not apply to vehicles of Categories X and Y.
- The footnote on alternative requirements for M2 vehicles, and M3/N2 vehicles with a maximum weight up to 8 tons, equipped with hydraulic braking, is deleted.
- Why
- The proposal says it is no longer deemed appropriate to compare the “collision avoidance capabilities” of an ADS to those of an AEBS.
- As the expert from Australia highlighted, the reciprocal arrangement between UN Regulations Nos. 131 and 152 is not technically feasible.
- The proposal gives transitional provisions to avoid immediately disrupting any approvals that are currently issued under the existing arrangements.
Q1What changed13 changes
Special provisions for vehicles equipped with an ADS (paras. 5.4.4. to 5.4.4.3.)
Paragraph 5.4.4. is now the heading “Special provisions for vehicles equipped with an ADS”. The AEBS must be deactivated upon activation of an ADS feature, and must not be able to be activated while an ADS feature is active. The AEBS must be automatically reactivated upon deactivation of an ADS feature. The provisions of paragraph 5.4.3. do not apply while an ADS feature is active. Before, paragraph 5.4.4. said that the AEBS function “may be suspended or its control strategies (i.e. braking demand, warning timing) adapted without indication to the driver” while automated driving functions are in longitudinal control of the vehicle. The condition was “as long as it remains ensured that the vehicle provides at least the same collision avoidance capabilities as the AEBS function during manual operation”.
Regulation does not apply to Categories X and Y (para. 1.2.)
New paragraph 1.2. says that this Regulation does not apply to vehicles of Categories X and Y. The footnote “As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.)” now cites document ECE/TRANS/WP.29/78/Rev.8. Before, it cited document ECE/TRANS/WP.29/78/Rev.6, para. 2. Its web address also changes.
Scope footnote on UN Regulation No. 131 deleted (para. 1)
The footnote * in paragraph 1 is deleted. It said that this Regulation also offers an alternative set of requirements to those contained in UN Regulation No. 131. The alternative was for vehicles of Category M2, and of Categories M3/N2 with a maximum weight of 8 tons or less, equipped with hydraulic braking. It also said that Contracting Parties applying both Regulations recognise approvals to either regulation as equally valid for these vehicles.
Transitional provision for Supplement 6 (para. 12.3.3.)
Under new paragraph 12.3.3., until 12 months after the date of entry into force of Supplement 6, Contracting Parties applying this UN Regulation “can continue to extend UN type approvals to the 02 series of amendments to this UN Regulation without taking into account the provisions of Supplement 6”.
At least two deliberate actions to switch off the ESC (para. 5.4.2.3.)
This paragraph applies where automatic deactivation of the AEBS function is a consequence of the driver manually switching off the vehicle's ESC function. In this case, the deactivation of the ESC must now require at least two deliberate actions by the driver. Before, the paragraph said this of the deactivation of the AEBS.
Definition of sufficient nominal Peak Braking Coefficient (para. 2.14.)
In paragraph 2.14., the colon after the defined term “Sufficient nominal Peak Braking Coefficient (PBC)” is deleted.
Q2Why it changed
- Proposed by
- Expert from the United Kingdom of Great Britain and Northern Ireland; task force on regulatory fitness for Automated Driving Systems; expert from Australia
- Working party
- GRVA, 24th session (January 2026)
Reasons
The existing text of paragraph 5.4.4. was added to address the compatibility of AEBS with ADS, in particular ALKS. Since that time, understanding of ADS has developed. The proposal says it is no longer deemed appropriate to compare the “collision avoidance capabilities” of an ADS to those of an AEBS.
Source
“5.4.4. was previously added to address the compatibility of AEBS with ADS (in particular ALKS). Since that time, understanding of ADS has developed and it is no longer deemed appropriate to suggest that the ‘collision avoidance capabilities’ of an ADS”
AEBS is a driver assistance feature and therefore has no role while an ADS is performing the DDT. The warning normally given to inform the driver that AEBS has been switched off is not required when the ADS is performing the DDT.
Sources (2)
“AEBS is a driver assistance feature and therefore has no role whilst an ADS is performing the DDT.”
“The warning normally given to inform the driver that AEBS has been switched off is not required when the ADS is performing the DDT.”
As the expert from Australia highlighted, the reciprocal arrangement between UN Regulations Nos. 131 and 152 is not technically feasible. The reason is a discrepancy between the scope of the Regulations and the vehicle categories noted in the footnotes. The conditions for approving a heavy-duty vehicle to UN Regulation No. 152 move to the approval requirements in paragraph 4. of UN Regulation No. 131. The aim is to make the reciprocal arrangement more robust and to better integrate it within national and regional approval schemes.
Sources (4)
“As has been highlighted by the expert from Australia, the reciprocal arrangement between UN Regulations No. 131 (R.131) and No. 152 (R.152) is not technically feasible”
“is not technically feasible due to a discrepancy between the scope of Regulations and the vehicle categories noted in the footnotes”
“The conditions for approving a heavy-duty vehicle to R.152 in moved to approval requirements in paragraph 4. of R.131.”
“to make the reciprocal arrangement more robust and also better integrate within national and regional approval schemes”
The proposal gives transitional provisions to avoid immediately disrupting any approvals that are currently issued under the existing arrangements. It would allow existing approvals to continue to be extended for at least 12 months after this supplement comes into force.
Sources (2)
“In order to avoid immediately disrupting any approvals that are currently issued under the existing arrangements, this supplement would be introduced via a special case with transitional provisions.”
“This would allow existing approvals to continue to be extended for at least 12 months after this supplement comes into force”
Proposer's reason (informal document GRVA-24-04)
The proposed amendments address current errors with the 02 series of amendments and its supplements. Paragraph 5.4.2.3. is amended to correctly reference ESC instead of AEBS.
Submitted by Expert from Australia. Working party adoption: ECE/TRANS/WP.29/GRVA/24, para. 73.
Sources (2)
“The proposed amendments address current errors with the 02 series of amendments and its supplements.”
“Paragraph 5.4.2.3 has been amended to correctly reference ESC instead of AEBS.”
Document trail
- 2025-11ProposalECE/TRANS/WP.29/GRVA/2026/6Task force proposal for several UN Regulations, including No. 152
- 2025-11ProposalECE/TRANS/WP.29/GRVA/2026/9Proposal by the expert from the United Kingdom of Great Britain and Northern Ireland for UN Regulations Nos. 131 and 152
- —ProposalGRVA-24-04Proposal by the expert from Australia for a supplement to the 02 series of amendments to UN Regulation No. 152
- —Working party adoptsECE/TRANS/WP.29/GRVA/24Session report, paras. 35(a), 72 and 73
- 2026-04Sent to WP.29ECE/TRANS/WP.29/2026/84Text that GRVA sent to WP.29 and AC.1
- 2026-06-24WP.29 adoptsECE/TRANS/WP.29/1192Adopted at the 199th session (session report, para. 103)
- PendingIn forceDate not yet known
Q3Who is affected
Vehicle manufacturer
- For vehicles equipped with an ADS, make sure that the AEBS is deactivated upon activation of an ADS feature.
- Make sure that the AEBS cannot be activated while an ADS feature is active.
- Make sure that the AEBS is automatically reactivated upon deactivation of an ADS feature.
- Where automatic AEBS deactivation follows manual ESC switch-off, make sure ESC deactivation requires at least two deliberate driver actions.
- Check whether your vehicles are of Categories X and Y, to which this Regulation does not apply.
- For M2, and M3/N2 up to 8 tons maximum weight, with hydraulic braking, check approvals based on the deleted footnote.
Component supplier
- Make sure that your AEBS can be deactivated upon activation of an ADS feature, as paragraph 5.4.4.1. requires.
- Make sure that your AEBS can be automatically reactivated upon deactivation of an ADS feature, as paragraph 5.4.4.2. requires.
Technical service / Approval authority
- For vehicles equipped with an ADS, check that the AEBS is deactivated upon activation of an ADS feature.
- Check that the AEBS is automatically reactivated upon deactivation of an ADS feature.
- Where automatic AEBS deactivation follows manual ESC switch-off, check that ESC deactivation requires at least two deliberate driver actions.
- Until 12 months after Supplement 6 enters into force, be ready for 02 series extensions without Supplement 6 provisions.
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ⓘ This report gives advice only. It is not legal or type-approval advice.