{HEAD ~ Threshold} determining means determines a velocity threshold value functionally related to {TAIL ~ the crash displacement value} 
{ HEAD ~ Threshold } determining means determines a velocity threshold value functionally related to { TAIL ~ the crash displacement value }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL