Unsealed. What a fascinating and more specific word I just learned today for what we call gravel roads.
That being said, you really have to watch that. There is a popular google maps cut-through near me that takes you down a road we call "bridge out" for, well, obvious reasons. At least once or twice a year the local tow truck operator has to figure out how to haul a car out of the creek down there.
There is another road that has been closed long enough that there is now a 30-40' oak tree in the middle of it, and yet google maps thinks it is an appropriate cut through between highways.
You really have to watch that in the country. The data is not great sometimes.