Each dimmable segment has a lower end point associated with a first value of the vehicle parameter and {HEAD ~ an upper end point} associated with {TAIL ~ a second value} of the vehicle parameter 
Each dimmable segment has a lower end point associated with a first value of the vehicle parameter and { HEAD ~ an upper end point } associated with { TAIL ~ a second value } of the vehicle parameter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH