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