6.a. Whiplash injury criteria candidate(s) and draft limits
As there is still some more data needed and due to the limited time, no clear recommendations can be given to the GTR 7 informal group.

On the one hand, guidance is needed on the level of risk related to what kind of injury (AIS1+, WAD2+, PMI) which is acceptable for the contracting parties. On the other hand, the correlation work on BioRID injury criteria measures to PMHS injuries is not completed and there might be a longer time frame needed to fulfil this work.

However, there are other approaches to set limits for seat performance criteria that should be considered by the contracting parties:

a) New approach on how to develop injury criteria risk functions based on insurance data as proposed by Dr. Johan Davidson. This approach seems to be promising at this stage and might be possible for NIC and upper and lower neck forces and My.

b) The criteria and limits proposed from Japan are backed by extensive simulation work and JNCAP data and are partially well correlated to the work of NHTSA/VRTC.

c) Based on the experience of Euro NCAP whiplash seat testing and assessment of over 200 different seat models limits can be proposed following a kind of good practice approach. In the last years no rating of the seats has been capped due to one of the proposed criteria. This means the so called “black” limits are not too demanding for modern seat design.

6.b. Further Recommendations
None.