What improvements would make it safer?  It is a largely straight road, with some potholes.  If you resurfaced the entire span then drivers would only increase their speed.  People killed on this deadly section have been victims of speeding, illegal or stupid attempts at passing, falling asleep at the wheel, DUI, texting, and impacts with deer.  Resurfacing the road would prevent none of these. Expanding to four lanes into wetlands would be an engineering nightmare and not eliminate the aforementioned problems.  Slow down, pay attention and be patient.  That will make this section of road safer.