92. The expert from Italy recalled the purpose of GRVA-12-15 and presented GRVA-13-17 superseding it. He detailed the proposed harmonization of UN GTR No.3 with UN Regulation No. 78.

93. The expert from Canada explained that the technical requirements applicable in his country do not impose a deceleration threshold when a brake lamp must be lit. He noted that adding such a threshold in UN GTR No. 3 would require to provide justifications for such an amendment that would highlight the safety benefit associated to it, as well as details on the costs it would generate. He asked whether some background information regarding some definitions could be provided so that it would become clearer what systems fall in the scope of the definitions.

94. GRVA invited delegations to share information on the safety benefits and costs considerations related to the 1.3 m/s2 threshold for the brake light activation and on the genesis of the new definition proposed.