Road Sign?

Can anyone tell me what this road sign means?

There are lots of them around. This one is on the east side of the paved part of the road that goes to the range. It is on the Northeast corner of a intersection of a minor road that goes west and a driveway to a farm.

The yellow and black checkerboard is a recurring motif, and there are signs with just the checkerboard and no <---> in the middle.