an adjuster configured to adjust the actual irradiating state of the headlight to the alternative irradiating state when it is determined that {HEAD ~ change} of the actual irradiating state of the headlight of the controlled vehicle to {TAIL ~ the alternative irradiating state} thereof reduces the level of glare for the target person 
to
an adjuster configured to adjust the actual irradiating state of the headlight to the alternative irradiating state when it is determined that { HEAD ~ change } of the actual irradiating state of the headlight of the controlled vehicle to { TAIL ~ the alternative irradiating state } thereof reduces the level of glare for the target person
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH