8. The expert from Germany introduced GRSP-65-17, explaining that the intention of the pedestrian protection test procedures as described in UN GTR No. 9 and UN Regulation No. 127 was to deliver an adequate level of protection for pedestrians in accidents up to an impact velocity of 40 km/h. International Harmonized Research Agenda research has shown that the cumulative frequency curves versus vehicle impact speed for pedestrian injuries and their respective injury causing parts showed that 58 per cent of the child head abbreviated injury scale (AIS) 2+ injuries were addressed to a vehicle impact speed up to 40 km/h, 40 per cent to adult head AIS2+ injuries and 50 per cent of the adult leg AIS2+ injuries respectively. He added that test procedures described in UN Regulation No. 127 and UN GTR No. 9 were meant to represent worst case scenarios. However, it was agreed that this was not the case for all possible scenarios and that also at lower impact speeds higher injury risk could occur due for example to different heights of the vehicle because of adjustable suspension systems. The representative from OICA reminded that during the type approval process the worst case scenario will be considered. GRSP agreed to keep GRSP-65-17 as an informal document for the December 2019 session of GRSP, awaiting further rationales to develop a proposal of amendments.

33. Referring to agenda item 3(b) (see paragraph 8 above), the expert from Germany suggested postponing discussion on GRSP-65-21 to allow careful consideration of the new provisions of the General Safety Regulation of the European Union, which had proposed an extension of the head impact zone. GRSP agreed to defer discussion of GRSP-65-21 to its December 2019 session and to distribute it with an official symbol.