I believe the last maintenance on the road was the mid-late 1990's. I recall on my first trip in a rental car I could only cross the first two small bridges. (I got to walk up the Sugarloaf ski trails, great views of the Bigelow's but steep as ski slopes are designed to have people go fast downhill....) When I went back to do Redington, you could get past the bridge.
Likely zoned residential as it would be a very convenient place for a 2nd home development for Sugarloaf skiers if you could generate enough interest. (You even have a small air strip in Carrabassett Valley) Likely there proposal if Saddleback could ever generate enough support to expand as they have tried (proposed, drawn up, threatened depending on your POV) to do in the past. At the moment, the people in & around the larger population centers have to drive past too many ski resorts & too long to make the major ME expansion plans feasible. (In the movies, "build it & they will come." sounds great, in reality, when looking for investors, they need to see a bit more before writing a check.)