What about motorcycles ? Even at the slowest speed possible its like riding on marbles, its a hazzard which shouldn't be there in the first place and is easily sorted.
mentioned in my previous post: they and cyclists are the most vulnerable. But the principle remains. You drive/ride in accordance with the road conditions. If the road is too dangerous to ride on get off and walk, and make sure you complain.
The council are storing up major trouble for themselves if they don't do something about it.