GTR 7: Proposal for Amendment 1
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Latest developments from the GTR 7 informal group to implement the Phase 2 development of the GTR. Phase 2 addresses a new measurement procedure for the effective height of the head restraint and introduction of the Biofidelic Rear Impact Device (BioRID).

Reference Number: GRSP/2018/27
Date: 20 September 2018
Proposal Status: Superseded
Related Documents:
GRSP-64-38 | Introduction to Revision of GTR 7 (document GRSP/2018/27)
GRSP-64-39/Rev.1 | GTR 7: Proposal for Amendment 1 (Phase 2 development)
GRSP/2019/5 | GTR 7: Proposal for Amendment 1 (Phase 2)
GRSP/2019/8 | GTR 7: Proposal to amend the draft Amendment 1
GRSP/2019/10 | GTR 7: Proposal to amend the draft Amendment 1
Discussion(s):
Working Party on Passive Safety | Session 64 | 11-14 Dec 2018

4. The expert from Germany introduced GRSP-64-38, to present the proposed Amendment 2 (GRSP-64-39-Rev.1 superseding ECE/TRANS/WP.29/GRSP/2018/27) to UN GTR No. 7 (Phase 2 of the UN GTR on head restraints), jointly prepared with the experts from Japan and the Netherlands. He explained that the proposal still has several items, in several square brackets, to be solved. However, he added that the draft amendment would introduced five main changes to the UN GTR:

  1. Procedure for establishing the height of the head restraint base on the head contact rather than at its absolute height;
  2. Height measurement test procedure;
  3. Deletion of the backset measurement test procedure using the H-point machine method;
  4. Introduction of the backset measurement test procedure using the R-point method; and
  5. Introduction of the dynamic performance test procedure, by using the Biomechanical Rear Impact Dummy (BioRID) and empirical criteria instead of biomechanical (due to the absence of an absolute medical definition of whiplash) to establish seat performance.