It means that the road is sometimes wet, muddy, snowy, icy, or sometimes it has been recently sprayed by a water truck or recently magged. I decided to take a few pics of what that looks like on my jeep (in this case, the road had been sprayed by a water truck to keep the dust down). I wasn't actually on the road to work when taking the pictures, but instead had pulled over on a convenient side road while traveling elsewhere after a couple/few days at work. Consequently the tags include two locations; the post location (below) links to the photos.
|The front of said jeep, the Eugene Mountains in the background.|
|The right side, with part of the East Range in the background.|
The rear tire looks low, but isn't.
|The rear and left sides. That's a high part of the East Range with the snow.|
|And the door handle area of the left, driver's side door.|