i have been wondering about this sign for a while it sayes cagis and is on a sign that looks like a...........

Question

it looks like a street name sign only shorter and isnt on a street as well as being only 3 inches by one inch, there seemingly randomly placed, what does it mean?
p.s. i know its in the wrong place put i cant find where it goes

ok well its not every mile and as i said its random i saw one in front of a house and one in front of a cow field, it seemed to be local but i wasn't sure if it really was local....i don't live in or near new orlens.
(of course i'm not going to revel my location)

Answer 1

we have county mile post markers every mile :)

Answer 2

Where do you see them? buildings, city, rest area, ??????????