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UN R175 Base text (01 series) · UNECE Regulation No. 175 (ECE R175) — Uniform provisions concerning the approval of motor vehicles with regard to the Acceleration Control for Pedal Error (ACPE).

UN R175 — 01 series of amendments

Changes from 00 series of amendments

Adopted at the WP.29 196th sessionEntry into force 2026-01-11
What changed
  • Paragraph 1.1. now applies the Regulation to vehicles of Category M1 and N1 equipped with automatic transmission.
  • The ACPE must now also control acceleration while creeping, as relevant, and pedestrians are now obstacles.
  • New paragraph 6.6.2. adds a test procedure for a creeping vehicle.
Why
  • The proposal aims to include ACPE approval provisions for vehicles of Category N1 and additional performance requirements for additional scenarios.
  • Amended paragraph 0. says that pedal misapplication scenarios in the accident data can vary widely from those included for testing ACPE.
  • The Contracting Parties justified including N1 vehicles in the scope based on data analysing the risk per registered vehicle.

Q1What changed86 changes

Scope: Category N1 vehicles and exemptions (paras. 1.1., 1.3. and 1.4.)

Paragraph 1.1. now applies the Regulation to vehicles of Category M1 and N1 equipped with automatic transmission. Before, paragraph 1.1. named vehicles of Category M1. Amended paragraph 0. says the situation on potential pedal misapplication in vehicles of Category N1 is ambiguous in some regions. It recommends that contracting parties evaluate the necessity to apply this Regulation to this category in their region(s). Paragraph 1.3. now refers to the “intended use” of the vehicle instead of its “on-road use”. New paragraph 1.4. lets the Type Approval Authority exempt completed vehicles on base vehicles lacking detection structure from the relevant forward and/or rear requirements.

The accident data shows that pedal misapplication scenarios can vary widely from those which have been included for testing ACPE under this version of the Regulation. Therefore, a second phase is was looking to expand the situations where ACPE can provide benefit. These considerations will cover led to requirements and test procedures to address ‘moving-off’ and moving vehicle scenarios (including addressing vehicles which ‘creep’ when the brake control is released), pedestrian scenarios, and the inclusion . The situation on potential pedal misapplication in vehicles of Category N1 vehiclesis ambiguous in some regions, therefore the contracting parties are recommended to carry out an evaluation of the necessity to apply this regulation in their region(s) for this vehicle category.
This UN Regulation applies to the type approval of vehicles of Category M1 and N1 equipped with automatic transmission with regard to their Acceleration Control for Pedal Error systems (ACPE).
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Definitions: obstacle, vehicle width, creeping and accelerator demand (paras. 2.7. and 2.10. to 2.14.)

Paragraph 2.7. now defines an “Obstacle” as either a vehicle, or a wall-like structure or a pedestrian. New paragraphs 2.10. and 2.11. define “Extreme outer edge” and “Vehicle width”. New paragraphs 2.12. to 2.13.1. define “Moving off”, “Maximum Creeping Speed” and “Creeping”. “Creeping” is motion with the powertrain engaged and operating at idle, no acceleration or brake demand, up to the Maximum Creeping Speed. New paragraph 2.14. defines “Reducing the effective demand of the accelerator control to zero”.

"Obstacle" means either a vehicle, or a wall-like structure or a pedestrian.
"Extreme outer edge" on either side of the vehicle, means the plane parallel to the median longitudinal plane of the vehicle and touching its lateral outer edge, disregarding the projection:
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When the ACPE must act (paras. 5.1.2. and 5.1.4. to 5.1.4.2.)

In paragraph 5.1.2., an accelerator control application must now also result in continuous acceleration to be regarded as a misapplication. The other criteria of paragraph 5.1.2. do not change. Under paragraph 5.1.4., the ACPE must control acceleration when the vehicle is accelerated both from standstill and, as relevant, while creeping. Before, paragraph 5.1.4. covered acceleration from standstill. Under new paragraph 5.1.4.1., no ACPE intervention is required during an AEBS warning or intervention, or above 10 km/h vehicle speed. Under new paragraph 5.1.4.2., the driver must be informed if ACPE is not ready to intervene 6 s after powertrain initiation.

An accelerator control application resulting in continuous acceleration and having a velocity of at least 400 per cent per second over a travel distance of at least 70 per cent of the total travel distance of the accelerator control, and reaching a maximum position of the accelerator control of at least 90 per cent with that velocity shall be regarded as an accelerator control misapplication in the context of the paragraph 5.1.1...
The ACPE shall control acceleration when the vehicle is accelerated both from standstill and, as relevant, while creeping.
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Obstacle position and conditions (para. 5.1.5.)

Paragraph 5.1.5. now covers obstacles not more than 1.5 m ahead or behind, in the vehicle path, when the triggering conditions are achieved. Before, it covered obstacles between 1.0 m and 1.5 m away at the time the accelerator control is applied. A new condition says that the obstacle is located at least 1.0m from the vehicle at that time. The obstacle can now also be a silhouette of a pedestrian that relates to a human being. New conditions set the position of vehicle, wall and pedestrian obstacles, instead of a lateral offset of not more than 0.2 m. Another new condition is that the vehicle travels at or below its maximum creeping speed forward and at or below 4km/h rearward.

The ACPE shall limit vehicle acceleration in order to prevent or mitigate a collision with an obstacle located between 1.0 m and not more than 1.5 m in front of or behind the vehicle, in the vehicle path, at the time the accelerator control is appliedtriggering conditions (as outlined in paragraph 5.1.2.) are achieved, provided:
If the vehicle is equipped with rear hatches, trunk lids or tailgates, they are closed and latched in the normal conditions of vehicle operation.
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ACPE performance and acceleration while creeping (paras. 5.1.6. to 5.1.6.2. and 5.1.12.)

Paragraphs 5.1.6., 5.1.6.1. and 5.1.6.1.1. are new headings: “ACPE performance”, “Acceleration from standstill” and “Low power to weight vehicles”. New paragraph 5.1.6.2. adds a requirement for acceleration while creeping. While creeping, if a collision is not prevented, the ACPE must reduce the effective accelerator control demand to zero at or before the collision point. Paragraph 5.1.12. now verifies the performance requirements with the test procedures in sections 6.6.1. and 6.6.2. Before, it referred to section 6.

ACPE performance
Acceleration from standstill
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Test targets, offsets and test procedures (paras. 6.3.2. to 6.7.)

New text in paragraph 6.3.2.: the technical service must take into account the ACPE boundary conditions for test target detection, as defined by the manufacturer. New paragraph 6.4.2. sets the pedestrian target: a child articulated “soft target” in its resting position, with the articulation switched off. Under paragraph 6.5.2., the vehicle target lateral offset now ranges from 0.0 m to the extreme outer edge distance, not 0.0 m to 0.2 m. Paragraph 6.6. tests forward and rearward, at least with ACPE interventions triggered at 1.0 m (+0.1 m) and 1.5 m (-0.1 m). New paragraph 6.6.2. adds a test procedure for a creeping vehicle, with starting point and accelerator control application profile selected by the Technical Service. Under paragraph 6.7., if deemed justified, the Technical Service may also test any condition within paragraph 5.1.5. or alternative accelerator control application profiles.

During the conduct of the test the technical service need to ensure that the boundary conditions of the ACPE - as defined by the manufacturer - with regard to the detection of the test target are taken into account (e.g. avoid blocking of a sonar system used, ensure that a vision system used can properly identify the pedestrian test target used as a human by making it fully visible to the camera system before testing, etc.)
The targets used for the pedestrian detection tests shall be a child articulated "soft target" in its resting position with the articulation being switched off and be representative of the human attributes applicable to the sensor system of the ACPE under test according to ISO 19206-2:2018.
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Transitional provisions for the 01 series (paras. 12. to 12.1.8.)

New paragraph 12. gives transitional provisions. From the official entry into force of the 01 series, no Contracting Party applying this Regulation may refuse to grant or accept 01 series approvals. As from 1 September 2029, they are not obliged to accept approvals to the original version, first issued after 1 September 2029. Until 1 September 2031, they must accept approvals to the original version, first issued before 1 September 2029. As from 1 September 2031, they are not obliged to accept approvals issued to the original version. Notwithstanding paragraph 12.1.4., they must continue to accept them for vehicles not affected by the changes of the 01 series.

Transitional provisions
Transitional provisions applicable to the 01 series of amendments
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Q2Why it changed

Proposed by
Experts from the Informal Working Group on Acceleration Control for Pedal Error
Working party
GRVA, 21st session (January 2025)

Reasons

  • The proposal aims to include provisions for the approval of ACPE for vehicles of Category N1. It also aims to include additional performance requirements for additional scenarios.

    Source
    “It aims to include provisions for the approval for ACPE for vehicles of Category N1 as well as additional performance requirements for additional scenarios.”
  • The accident data shows that pedal misapplication scenarios can vary widely from those included for testing ACPE under this version of the Regulation. Therefore, a second phase was looking to expand the situations where ACPE can provide benefit. This led to requirements and test procedures for ‘moving-off’ and moving vehicle scenarios, including ‘creep’ after brake release, and pedestrian scenarios.

    Sources (3)
    “The accident data shows that pedal misapplication scenarios can vary widely from those which have been included for testing ACPE under this version of the Regulation.”
    “Therefore, a second phase was looking to expand the situations where ACPE can provide benefit.”
    “These considerations led to requirements and test procedures to address ‘moving-off’ and moving vehicle scenarios (including addressing vehicles which ‘creep’ when the brake control is released), pedestrian scenarios.”
  • The Contracting Parties justified including N1 vehicles in the scope based on data analysing the risk per registered vehicle.

    Source
    “He mentioned that the group could not reach a consensus on the need to include N1 vehicles in the scope of the regulation: the Contracting Parties justified their inclusion based on the data analysing the risk per registered vehicle,”

Document trail

  1. 2024-11ProposalECE/TRANS/WP.29/GRVA/2025/17Proposal for the 01 series of amendments, submitted by the experts from the Informal Working Group on ACPE
  2. —Amended in sessionGRVA-21-33Proposal for amendments to ECE/TRANS/WP.29/GRVA/2025/17, submitted by the experts from the IWG on ACPE
  3. —Working party adoptsECE/TRANS/WP.29/GRVA/21Session report, para. 98
  4. 2025-04Sent to WP.29ECE/TRANS/WP.29/2025/56Text that GRVA adopted and submitted to WP.29 and AC.1
  5. 2025-06WP.29 adoptsECE/TRANS/WP.29/1186Adopted at the 196th session (session report, para. 111)
  6. 2026-01-11In forceC.N.53.2026.TREATIES-XI.B.16.175UN depositary notification

Q3Who is affected

Vehicle manufacturer

  • Note that paragraph 1.1. now includes vehicles of Category N1 equipped with automatic transmission.
  • Make sure the ACPE also controls acceleration while creeping, as relevant (paragraph 5.1.4.).
  • Make sure the ACPE also limits acceleration for pedestrian obstacles, under the conditions of paragraph 5.1.5.
  • Inform the driver if ACPE is not ready to intervene 6 s after powertrain initiation (paragraph 5.1.4.2.).
  • If a collision is not prevented in the creeping test, demonstrate that the intervention complies with paragraph 5.1.6.2.
  • Note that, from 1 September 2029, Contracting Parties need not accept original-version approvals first issued after that date.
  • Note that, from 1 September 2031, Contracting Parties need not accept original-version approvals, except under paragraph 12.1.5.

Component supplier

  • Check that ACPE sensor systems can detect the child articulated “soft target” of paragraph 6.4.2.

Technical service / Approval authority

  • Select the starting point and accelerator control application profile for the creeping test (paragraph 6.6.2.1.).
  • Use a child articulated “soft target”, articulation switched off, for pedestrian detection tests (paragraph 6.4.2.).
  • Determine the pedestrian target orientation, and choose 0° or 180° for the vehicle target (paragraphs 6.5.4. and 6.5.5.).

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ⓘ This report gives advice only. It is not legal or type-approval advice.

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