Scott, funny you mention this...
When I left Kenly,NC the other day from the Flying J, there was a trucker in front of me with sheets of slush and ice that were sliding off his trailer and they were coming down RIGHT in front of me....Had I not been going slow at the start of the intersection,there'd have been the chance that those sheets of ice would've come down on me on the roadway and I may have had some damage...
In my professional life,it was held that you are liable for the condition of that rig and any damage to it or another vehicle as a result of your action/inaction.
While it's slippery and I wouldn't advocate WALKING on it, I'm thinking you should at least exercize some effort in getting some of it off with a ladder if possible...
If not possible to safely remove it,you'll just have to turn your CB off until it clears cuz you'll get an earful...