Apparatus and {HEAD ~ method} for defining {TAIL ~ a safety zone} using a radiation source for a vehicle 
for defining
Apparatus and { HEAD ~ method } for defining { TAIL ~ a safety zone } using a radiation source for a vehicle
OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH