UN R13 and UN R78 establish different brake system requirements for 4-wheel vehicles. R13H requires split service brake systems with front/rear proportioning; R78 permits split service brake systems, combined brake systems, or two separate service brake systems without proportioning requirements. Type-O dry braking tests differ: R13H requires engine disconnected at 100 km/h with stopping distance 0.1v + 0.0060 v² and MFDD 6.43 m/s²; R78 specifies multiple tests at 40, 60, and 100 km/h with varying requirements. Type-I brake fade tests use different snub protocols and performance thresholds. Secondary braking failure criteria differ at specified speeds. R78 requires wet brake testing, a 30 km/h dynamic park brake test with 18% gradient and 5 minutes hold time; R13H specifies static gradient tests. R78 includes detailed ABS, functional safety, and regenerative braking requirements; R13H does not.

Proposal to introduce specific deceleration requirements for the Speed Electronically Power Assisted Cycles belonging to the Category L in UN R78.

Proposal to correct a misalignment between the transitional provisions for the new 06 series of amendments to UN R78 and the General Guidelines for Transitional Provisions in UN Regulations.

Proposal to adapt the deceleration threshold for application to Speed Electric Power Assisted Bicycles (S-EPAC).

Proposal to correct a misalignment between the transitional provisions for the new 06 series of amendments to UN R78 and the General Guidelines for Transitional Provisions in UN Regulations.

Proposal to introduce new requirements for Complex Electronic Control Systems (in line with the corresponding provisions for passenger cars in UN Regulation No. 13-H) and to highlight the approval number and marking provisions pursuant to the series of amendments.

Text prepared by the GRVA secretariat based on document GRVA/2023/4 as adopted by GRVA during its 15th session to highlight the approval number and marking provisions pursuant to the series of amendments.

Proposal to improve UN R78 alignment with UN R13-H provisions concerning the stop lamp signal.

Proposal to introduce new requirements for Complex Electronic Control Systems, in line with the corresponding provisions for passenger cars in UN Regulation No. 13-H

This informal document proposes amendments to UN R78 to introduce new requirements for “Complex Electronic Control Systems” aimed at addressing new technologies such as automatically commanded braking.

Proposal to improve UN R78 alignment with UN R13-H provisions concerning the stop lamp signal.

Proposal to further align the stop lamp signal provisions in UN R78 with UN R13-H to ensure consistent stop lamp behaviour across different vehicle categories and therefore avoid confusion to road users driving behind a braking vehicle regardless of its category.

Proposal to introduce references to the new American Society for Testing and Materials (ASTM) Standard Reference Test Tyre F2493.

Proposal to introduce references to the new American Society for Testing and Materials (ASTM) Standard Reference Test Tyre F2493.

Proposal to align UN R78 with the latest amendments to UN R13-H regarding the deceleration thresholds for the activation of the stop lamp(s) under regenerative braking and to introduce a reference to the new American Society for Testing and Materials (ASTM) Standard Reference Test Tyre F2493.

Proposal to amend ECE/TRANS/WP.29/GRVA/2021/26

Proposes to align UN Regulation No. 78 with the latest amendments to UN Regulation No. 13-H regarding the deceleration thresholds for the activation of the stop lamp(s) under regenerative braking

Introduces a reference to the new American Society for Testing and Materials (ASTM) Standard Reference Test Tyre F2493.

Proposal to align UN R78 with the latest amendment to UN R13-H regarding deceleration thresholds for activation of stop lamps under regenerative braking.

Proposal to harmonise the requirements of UN R78 with the latest amendments to UN GTR No. 3 adopted by GRVA at its fourth session. Paragraph 5.1.18 aims to clarify with an explicit article that the rider is duly informed when activating a riding mode that disables the ABS on the rear axle.

Proposal to harmonise the requirements of UN R78 with the latest amendments to UN GTR No. 3 adopted by GRVA at its fourth session. Paragraph 5.1.18 aims to clarify with an explicit article that the rider is duly informed when activating a riding mode that disables the ABS on the rear axle.

Side-by-side comparison of GTR 3 and UN R78 provisions.

Proposal to ensure consistency between GTR 3 and UN R78 in light of the proposed amendments to GTR 3 (GRVA/2019/23). Paragraph 5.1.17 aims to clarify with an explicit article that the rider is duly informed when activating a riding mode that disables the ABS on the rear axle.

Proposal to introduce provisions relevant to the activation of stop lamps under more conditions than application of the service brake only, e.g. also by regenerative braking.

Proposal to introduce provisions relevant to the activation of stop lamps under more conditions than application of the service brake only, e.g. also by regenerative braking.

Proposal to introduce activation of stop lamps under more conditions than application of the service brake only (e.g. also by regenerative braking).

Updated version of document GRRF/2017/14 to amend UN R78 with regard to stop lamp activation. IMMA has proposed (document GRE/2015/42) to allow stop lamp activation under UN R53 through means other than application of the brakes (e.g., by electric vehicle regenerative braking). This proposal accordingly amends UN R78 regarding generation of the brake signal.

Proposal of amendments to clarify the original text as proposed in GRRF/2017/14.

Regulation No. 53 currently allows for the activation of the stop lamp by application of the brakes only. As already presented at a session of the Working Party on Lighting and Light-Signalling (GRE) (see ECE/TRANS/WP29/GRE/2015/42), IMMA is proposing to introduce the activation of stop lamps under more conditions than the application of the service brake only, e.g. also by regenerative braking. As noted in the report of seventy-fourth session of GRE, see ECE/TRANS/WP29/GRE/74, para. 30: “the proposal might need to be accompanied by a modification of Regulation No. 78 under GRRF.” Therefore, IMMA has prepared this proposal for Regulation No. 78. A revised corresponding proposal on Regulation No. 53 will also be submitted to the October 2017 session of GRE.

Proposal from GRRF to correct document WP.29/2016/114 (proposal to align UN R78 with other braking regulations as regards anti-lock braking systems and to clarify the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle. Under (e), the correct reference to the paragraph GTR No. 3 should read 5.1.13. The correct reference under f) to the previous points should be (a) to (e) instead of (a) to (f).

Proposal for amendments to the draft 04 series of amendments to Regulation No. 78. The draft 04 series proposes to align UN R78 with the provisions for anti-lock braking systems used in other regulations, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13. The proposal clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle.

Proposal to align the text with the provisions for anti-lock braking systems used in other regulations, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13. The proposal clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle.

Proposal to include three-wheeled category L vehicles within the scope of ABS testing, to align UN R78 with the provisions for anti-lock braking systems used in other regulations, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13, and to allow for Emergency Stop Signal (ESS) systems on motorcycles and related vehicles. The proposal also clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle.

Revised proposal to align UN R78 with the provisions for anti-lock braking systems used in other regulations, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13. The proposal clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle. This revised proposal takes into account comments received during the February 2016 GRRF session.

Revised proposal to align UN R78 with the provisions for anti-lock braking systems used in other regulations, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13. The proposal clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle. The European Commission prepared this revised proposal in cooperation with Germany, the Netherlands and IMMA. Given the importance of the changes, the proposal includes transitional provisions.

Proposal to allow Emergency Stop Signal (ESS) systems on motorcycles and related vehicles.

IMMA presentation regarding the intention to propose emergency stop signal (ESS) provisions to UN R78 and GTR No. 3. ESS, which automatically activates hazard warning lights during forceful braking situations, already exists under UN R13-H for cars and trucks. IMMA has submitted document GRE-2015-40 to similarly amend UN R53.

Revised proposal by Italy pursuant to comments received during the 80th GRRF (September 2015) session to introduce provisions for the approval of replacement brake discs for L-category (motorcycle and related) vehicles.

EC responses to IMMA comments (document GRRF-80-13) on the proposa to align the text with the provisions for anti-lock braking systems (ABS) used in other regulations (document GRRF/2015/41).

Discussion document raising concerns and offering proposals concerning motorcycle ABS testing.

Documents GRRF/2015/40 and 41 propose to align GTR 3 and UN R78 with the provisions for anti-lock braking systems used in other regulations. The proposal clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle. IMMA wishes to make the wording more technology-neutral, clarify test conditions considered impractical, and allow time for manufacturers to comply (i.e., add transitional provisions).

Proposal to include three-wheeled category l vehicles within the scope of ABS testing under UN R78. This would align the scope with EU Directive 93/14/EEC.

Proposal to align the text with the provisions for anti-lock braking systems used in other regulations, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13. The proposal clarifies the limits on the use of any temporary ABS deactivation switch and prohibition against permanent disabling of ABS if fitted on a motorcycle.

Proposal to clarify the electromagnetic compatibility requirements under UN R78 with regard to the application of UN Regulation No. 10.

Reference prepared by the WP.29 secretariat

Presently, it is not fully clear whether an anti-lock braking system (ABS) switch-off or altering mode is permitted on L-category vehicles, whereas it is clearly not allowed on other vehicle categories. This proposal is aimed at ensuring a consistent approach for all motor-vehicles equipped with anti-lock braking systems, including specific exemptions for certain off-road vehicles as incorporated in UN Regulation No. 13.

Proposal to include three-wheeled category l vehicles within the scope of ABS testing under UN R78. This would align the scope with EU Directive 93/14/EEC.

Information on the mandatory installation of advanced brake systems for motorcycles and of Lane Departure Warning Systems for heavy-duty vehicles.

Proposal to require proof of electromagnetic compatibility through compliance with UN R10 or any other equivalent test as may be agreed between the manufacturer and test service.

Proposal as approved by the GRRF to clarify provisions on the use of Combined Braking Systems (CBS) and make some additional editorial improvements.

IMMA comments on the suggestion to include a cross reference to UN R10 in UN R78 in order to ensure that electromagnetic interference does not affect electronic brake modules in a way that causes unsafe brake operation as was adopted for UN R13.

Proposal to clarify the provision for permissible deactivation of ABS systems under the proposal to clarify the use of Combined Braking Systems (CBS) under UN R78.

Proposal based upon informal document GRRF-76-45 to clarify provisions on the use of Combined Braking Systems (CBS) and make some additional editorial improvements.

Proposal to clarify provisions on the use of Combined Braking Systems (CBS) and make some additional editorial improvements. This document contains GRRF/2014/05, GRRF/2014/06, GRRF-76-36 Rev 1 and updated by the comments raised at the seventy-sixth GRRF session.

Proposal to clarify the intent of the selected paragraphs to ensure that systems with with one service brake meet braking performance requirements using only that brake system (i.e, without any assistance from the secondary brake system). There had been an interpretation that for systems with two service brakes each brake had to meet the requirements which would result in higher stringency levels than intended by the requirement for single brake systems.

The proposal also clarifies the parts of the braking system that should be considered with respect to hydraulic brake and mechanical transmissions and further clarifies that the test procedures are designed to simulate a brake failure rather than produce one.

India supports the purpose of the amendments to GTR No. 3 (GRRF/2014/4) and UN R78 (GRRF/2014/5) to provide same safety in the case of a failure in CBS as that of the conventional system of the two independent brakes for two wheelers. However, India believes the application of the amendments to three-wheelers requires additional consideration. Therefore, in order to proceed with amendments concerning CBS for two-wheelers, India proposes changes to the proposed text in order to allow further consideration of three-wheelers.

Explanation of Dutch concerns with the IMMA proposals on the measurement of brake efficiency and the use of a representative vehicle for testing.

Updated proposal for a series of amendments to clarify a variety of requirements, notably concerning test surface requirements, ABS cycling, and peak braking coefficient measurements under UN R78.

Proposal from the International Motorcycles Manufacturer Association (IMMA) to introduce amendments clarifying the current text on the use of Combined Braking Systems (CBS) into UN R78.

Corrections to the proposed series of amendments to clarify a variety of requirements, notably concerning test surface requirements, ABS cycling, and peak braking coefficient measurements in UN R78.

Suggested changes to the proposal to introduce the concept of “revision of approvals” into the UN Regulations under GRRF responsibility in order to align the UN Regulations with the EU Whole Vehicle Type Approval Directive 2007/46/EC.

Comments on the proposed series of amendments to clarify a variety of requirements, notably concerning test surface requirements, ABS cycling, and peak braking coefficient measurements in UN R78.

Comments on the text prepared by the International Motorcycle Manufacturers Association (IMMA) to modify provisions concerning the sharing of components within combined braking systems (CBS) in order to adapt to technological progress.

Text prepared by the International Motorcycle Manufacturers Association (IMMA) to modify provisions concerning the sharing of components within combined braking systems (CBS) in order to adapt to technological progress.

Series of amendments to clarify a variety of requirements, notably concerning test surface requirements, ABS cycling, and peak braking coefficient measurements.

Text prepared by the International Organization of Motor Vehicle Manufacturers (OICA) to introduce the concept of “revision of approvals” into the UN Regulations under GRRF responsibility in order to align the UN Regulations with the EU Whole Vehicle Type Approval Directive 2007/46/EC in order to ease the administrative burden for both manufacturers and approval administrations regarding the extension of existing approvals.

Summary of Canada’s acceptance of certain UN Regulations in whole or in part as alternatives to the requirements of Canada Motor Vehicle Safety Standards.

Proposal by IMMA to clarify the text of UN R78 and align the text with Global Technical Regulation No. 3.

Text prepared by the International Motorcycle Manufacturers Association (IMMA) in order to introduce amendments to clarify the current text for the use of Combined Braking Systems (CBS).

Proposal from IMMA in order to introduce amendments to clarify the text and introduce simplified test procedures in this regulation and align it with UNECE Regulation No. 78.

Proposal from IMMA in order to introduce amendments to clarify the text and introduce simplified test procedures in UN R78 and align it with GTR No. 3.

Presentation on EU plans for updating the regulatory regime for motorcycles and related vehicles, including obligatory fitment of advanced brake systems, abandonment of the 74 kW power restriction, anti-tampering measures, and mandatory “automatic headlamp on” feature.