The boundary distance is defined as {HEAD ~ a maximum distance} between {TAIL ~ the reference vehicle} and a target person such that, when a distance between the reference vehicle and the target person is within the maximum distance, the target person is estimated to be undazzled by the headlight of the reference vehicle 
The boundary distance is defined as { HEAD ~ a maximum distance } between { TAIL ~ the reference vehicle } and a target person such that , when a distance between the reference vehicle and the target person is within the maximum distance , the target person is estimated to be undazzled by the headlight of the reference vehicle
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH