Proposal to adapt GTR No. 3 to technical and standardization progress, introducing provisions for the activation of the stop lamp under regenerative braking and to enable the use of the new American Society for Testing and Materials (ASTM) Standard Reference Test Tyre F2493 for the measurement of the Peak Braking Coefficient (PBC). This amendment aims to keep the global harmonization of motorcycle braking requirements in UN GTR No. 3 and the most recent version of UN Regulation No. 78.
146. The representative of Italy requested the authorization to develop amendment 4 to the UN GTR No. 3 (ECE/TRANS/WP.29/2022/47). He explained that, after having submitted the proposal to AC.3 in December 2021, Italy informed GRVA in January 2022 of their intention to propose an amendment to the UN GTR to harmonize it with UN Regulation No. 78. The proposal would include requirements for stop lamp activation under regenerative braking and the updating of the references to American Society for Testing and Materials (ASTM) standards for the determination of the Peak Braking Coefficient (PBC). He clarified that, following informal consultations with GRVA and contracting parties, the work plan contained in the document may be updated to take into account relevant GRVA developments and amendments related to stop lamp activation. AC.3 requested the secretariat to keep the document on its agenda for the June 2022 session.