While traveling through Wyoming recently I noticed some odd little signs. These signs were the same size color of a common mile marker sign, however
there seemed to be no pattern or spacing between them i.e. every mile, 1/4 mile etc.
The highway I noticed them on is US-20/WY-789 between the towns of Shoshoni, and Thermopolis.
I've lived in and around Wyoming for many years, and I've never seen these types of signs before.
These signs were located on the left side of the highway, and although visible, were hard to distinguish.
Below is my best attempt with paint to visualize them for you.
The markings to the right of the
L seemed to vary from square shapes to other unknown symbol type markings.
I should have stopped and taken an actual picture.
Any ideas as to what these signs are?