Sigh. FWIW, the shoulder is covered with loose chip seal.
For those who proclaim that this couldn't happen to you because you'd be riding on the shoulder, see
this thread by Metric Man.
For those who proclaim that by riding on the other side of the rumble strips you would hear the rumble strips and get out of the way, note that in Metric Man's crash (not accident) from the time the full size pickup touches the fog line at 25.28 to impact at 26.16 is 0.88 seconds. Your cat-like reflexes are much better than mine.
For those who wouldn't ride on such roads, good for you.
-mr. bill