During {HEAD ~ an impact} of the vehicle 1 against {TAIL ~ the safety vehicle} 2, the low deformation door section 11.1 is affected first 
During { HEAD ~ an impact } of the vehicle 1 against { TAIL ~ the safety vehicle } 2 , the low deformation door section 11.1 is affected first
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH