The present invention pertains to {HEAD ~ an apparatus} and method for defining {TAIL ~ a safety zone} for a vehicle 
for defining
The present invention pertains to { HEAD ~ an apparatus } and method for defining { TAIL ~ a safety zone } for a vehicle
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH