Sand on the road is no big deal. Just don't corner too fast and avoid use of the front brake while in it. Well-meaning road crews dump it all over in the winter and it tends to accumulate at the bottom of hills.
One road I use at the beach is a sand road. Deep sand is really hard to ride in unless it is damp, so it is not always passable. On a sand road, you can slide one foot on it for extra stability, just as you would on ice.
Paul