Does anyone here live near NW Wyoming? On a highway in WY (I believe it was HWY 20 up around Yellowstone), there are signs with the letter L and three dots on them. One would have an upright L with the three dots, then the L would be upside down w/ the dots, then the L would be backwards and finally upside-down and backwards (repeating pattern). Does anyone know what these signs are for / mean? They were kinda like cryptic HWY mile- marker signs...
-Scott