UN R13H Supplement 6 (01 series) · UNECE Regulation No. 13H (ECE R13H) — Uniform provisions concerning the approval of passenger cars with regard to braking.
UN R13H — Supplement 6 to the 01 series of amendments
Supplement 5 → 6
- What changed
- The parking braking system may now use a park lock device for the static parking brake requirements, with new rules in paragraphs 5.1.4.3.3. and 5.2.19.5.
- The conditions for disconnection of the braking surfaces or the park lock device of the parking braking system no longer include “or by an ADS”.
- This supplement adds the words “regardless of its means of activation” to paragraph 5.2.23. on the emergency braking signal.
- Why
- The park lock proposal aimed to allow the type approval of park lock devices.
- The OICA proposal aimed at a consistent interpretation of the activation conditions for the Emergency Stop Signal (ESS).
- This means that the application of the service braking system through the Electronic Parking Brake (EPB) control can generate the ESS.
Q1What changed12 changes
Park lock device in the parking braking system (para. 5.2.10.)
The parking braking system may now use a park lock device to meet the static parking brake requirements (Annex 3, paragraphs 2.3.1. and 2.3.2.). The park lock device may replace the means acting on the braking surfaces or work in combination with them. The park lock device must consist of components of adequate strength and be as effective as layouts that act only on the braking surfaces. After complete engagement of a parking braking system with a park lock device, the affected wheels must not move. The conditions for disconnection of the braking surfaces now also apply to disconnection of the park lock device, as relevant. The disconnection conditions no longer include “or by an ADS”, and “remote control device” is now “remote-control device”.
Axle information for vehicles with a park lock device (para. 5.1.4.3.3.)
New paragraph 5.1.4.3.3. applies to vehicles equipped with a park lock device. The manufacturer must specify on which axle or axles the park lock device acts. The axle information must be visible and indelible on the vehicle, or freely available in another way, for example a handbook or electronic data record.
Red warning signal for a park lock device (para. 5.2.19.5.)
New paragraph 5.2.19.5. covers a parking braking system with a park lock device that has detected, at standstill, a request to apply it. Then a red warning signal must flash until the park lock device is locked, unless the system prevents further movement of the braked wheels. If a separate red warning signal that meets paragraph 5.2.21.2. normally shows actuation of the parking brake lock device, it must give this warning.
Wording of the parking brake warning signal rules (para. 5.2.19.2.1.)
In paragraph 5.2.19.2.1., the condition for suppressing the flashing red warning signal is now correct “engagement” of the parking brake, not “clamping”. The text also uses the spelling “signaled” instead of “signalled”, and it adds a comma after “suppressed”. The yellow and red warning signals that these subparagraphs require stay the same.
Emergency braking signal and the means of activation of the service braking system (para. 5.2.23.)
Paragraph 5.2.23. applies to vehicles with the means to indicate emergency braking. As before, only the application of the service braking system can switch the emergency braking signal on and off, when the paragraph’s conditions are met. This supplement adds the words “regardless of its means of activation” after “the application of the service braking system”. An example of a means of activation is an auxiliary control as specified in paragraph 5.2.2.4.
Q2Why it changed
- Proposed by
- Experts from CLEPA and OICA (park lock device) and experts from OICA (Emergency Stop Signal)
- Working party
- GRVA, 23rd session (September 2025)
Reasons
The proposal from CLEPA and OICA addressed the type approval of a park lock device to hold the vehicle. The proposal covered a park lock device used as an alternative to the friction parking brake, or in combination with it. It is based on ECE/TRANS/WP.29/GRVA/2025/13 amended by GRVA-20-06/Rev.1 and ECE/TRANS/WP.29/GRVA/2025/14 amended by GRVA-20-07/Rev.1. ECE/TRANS/WP.29/GRVA/2025/14 aimed to let a park lock device meet the static requirements for parking braking systems. At GRVA, the representative of CLEPA recalled that the purpose of their proposal (ECE/TRANS/WP.29/GRVA/2025/34) was to allow the type approval of park locks. Several delegations noted that the revised proposal (GRVA-23-07/Rev.2) addressed the concerns that they had expressed at the previous session.
Sources (4)
“addressing the type-approval of a park lock device as an alternative to or in combination with the friction parking braking to hold the vehicle”
“This amendment aims to enable the use of a park lock device as an alternative to a friction type parking braking system to fulfil the static requirements of UN Regulation No. 13-H for parking braking systems.”
“The representative of CLEPA recalled the purpose of their proposal for amendments to UN Regulation No. 13 (ECE/TRANS/WP.29/GRVA/2025/34) aimed at allowing for the type-approval of park-locks”
“presented a revised proposal (see GRVA-23-07/Rev.2). Several delegations noted that this proposal addressed their concerns expressed at previous session.”
The earlier proposal (ECE/TRANS/WP.29/GRVA/2025/14) said that the manufacturer provides additional information, to enable periodic technical inspections of a park lock device. At GRVA, CLEPA clarified that the test for periodic technical inspection was not part of the proposal and would be addressed at European level.
Sources (2)
“To enable periodic technical inspections for a Park Lock Device, additional information is provided by manufacturer.”
“CLEPA clarified that the test for PTI was not part of that proposal and that it would be addressed at European level.”
The earlier proposal (ECE/TRANS/WP.29/GRVA/2025/14) said that the word “engagement” seems more appropriate than “clamping”. The reason given was that “the combination of friction type and park lock device or a combination of both will keep the vehicle in a static position”.
Source
“As the combination of friction type and park lock device or a combination of both will keep the vehicle in a static position, the wording engagement seems more appropriate as clamping”
An auxiliary control can be an Electronic Parking Brake (EPB) control, on a vehicle with an electronic parking brake system. It is common practice to apply the service braking system through the EPB control.
Sources (2)
“by means of an auxiliary control, which could be an Electronic Parking Brake (EPB) control in case of an electronic parking brake system”
“Therefore, the application of the service braking system via the EPB control is common practice.”
The proposal aimed to clarify the existing text. The aim was an aligned and consistent interpretation of the activation conditions for the Emergency Stop Signal (ESS). This means that the application of the service braking system through the EPB control can generate the ESS.
Sources (2)
“The proposal aims to clarify the existing text in order to ensure an aligned and consistent interpretation of the activation conditions for an Emergency Stop Signal (ESS)”
“means the ESS can be generated by application of the service braking system via the EPB control”
Document trail
- 2024-11ProposalECE/TRANS/WP.29/GRVA/2025/14Park lock proposal for UN Regulation No. 13-H by experts from OICA and CLEPA
- 2025-04RevisedECE/TRANS/WP.29/GRVA/2025/34Park lock proposal for UN Regulations Nos. 13 and 13-H by experts from CLEPA and OICA
- 2025-09RevisedECE/TRANS/WP.29/GRVA/2025/45/Rev.1Revised proposal by experts from OICA on the Emergency Stop Signal
- —Amended in sessionGRVA-23-07-Rev.2Revised park lock proposal by experts from CLEPA and OICA
- —Working party adoptsECE/TRANS/WP.29/GRVA/23GRVA session report, paras. 57 and 60
- 2025-12Sent to WP.29ECE/TRANS/WP.29/2026/15Text that GRVA sent to WP.29 and AC.1
- 2026-03WP.29 adoptsECE/TRANS/WP.29/1190Adopted at the 198th session (session report, para. 114)
- 2026-09-30In forceC.N.403.2026.TREATIES-XI.B.16.13HUN depositary notification
Q3Who is affected
Vehicle manufacturer
- If you use a park lock device, make sure it is as effective as layouts acting only on braking surfaces.
- Make sure the affected wheels do not move after complete engagement of a parking brake with a park lock device.
- For vehicles with a park lock device, specify on which axle or axles it acts (paragraph 5.1.4.3.3.).
- Mark the park lock axle information on the vehicle visibly and indelibly, or make it freely available in another way.
- Make sure the red warning signal for a park lock device meets the new paragraph 5.2.19.5.
- If an ADS controls the disconnection of the parking braking system, check this design against the new disconnection conditions.
- Make sure only service braking, whatever its means of activation, generates the emergency braking signal under paragraph 5.2.23. conditions.
- Test the emergency braking signal also with service braking through an auxiliary control (paragraph 5.2.2.4.).
- Update your documents that quote the changed parking brake disconnection text or paragraphs 5.2.19.2.1. or 5.2.23.
Component supplier
- If you supply park lock devices, make sure they consist of components of adequate strength.
- Make sure that your parking brake control software gives the red warning signal of paragraph 5.2.19.5. for park lock devices.
- Make sure that your brake control software applies the paragraph 5.2.23. rule to each means of service brake activation.
- If your Electronic Parking Brake (EPB) control applies the service braking system, test the emergency braking signal with it.
- Give the vehicle manufacturer updated system documents for the changed paragraphs 5.2.19.2.1., 5.2.19.5. and 5.2.23.
Technical service / Approval authority
- When you assess a park lock device, check that it is as effective as layouts acting only on braking surfaces.
- Check that the manufacturer specifies on which axle or axles the park lock device acts (paragraph 5.1.4.3.3.).
- Check the red warning signal for a park lock device against paragraph 5.2.19.5.
- When you assess disconnection of the parking braking system, use the new conditions without “or by an ADS”.
- When you assess the emergency braking signal, include service braking through an auxiliary control (paragraph 5.2.2.4.).
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ⓘ This report gives advice only. It is not legal or type-approval advice.