Its the main road to the naval base, know it well. Only other option is a long diversion, over the hills from Loch Lomond. I guess that diversion is okay at the moment, as it does close regularly with heavy snow.
Unfortunately, from the local news (in Devon), I hear a 18 year old lad has gone missing, after going out to take a few photos of the sea near Newton Ferrers in south Devon.
What a tragedy.