However where the road descends into the final 4 miles of Jack Creek it is extremely narrow, confined by canyon walls and a creek and there are a lot of property owners who would lose big if the road was brought to county 2 lane standards let alone state highway standards.
Like bunion mentioned, it's a pretty tough road to improve. Just to be clear, those final 4 miles (actually 3) are already county road. The "Moonlight Road" is in way better condition than the county portion. They replaced 2 of the 3 bridges and widened them to two way traffic. A few years ago major portions of the road washed out from the creek, but they did a fantastic job of rebuilding it and those areas are some of the best now. It's a bit sketchy and I've seen cars with all four wheels in the water.
It will be interesting to see what happens with it though..