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