How long as these guys been in use for?
http://fineartamerica.com/images-medium-5/food-next-exit--3-larry-mulvehill.jpg (http://fineartamerica.com/images-medium-5/food-next-exit--3-larry-mulvehill.jpg)
I've seen them as far back as the 1980's in some states. CT started using them in the late 1980's when it rolled out it's lovely reflective button copy signage.
We have a thread going on this topic that you might be interested to look at.
https://www.aaroads.com/forum/index.php?topic=12293.0 (https://www.aaroads.com/forum/index.php?topic=12293.0)
Quote from: briantroutman on February 19, 2017, 12:59:10 PM
We have a thread going on this topic that you might be interested to look at.
https://www.aaroads.com/forum/index.php?topic=12293.0 (https://www.aaroads.com/forum/index.php?topic=12293.0)
Thanks.