Message posted by Joerg (Webmaster) on January 23, 2018 at 16:00:33 PST:
I heard back from NDOT about the markers. Apparently they are old NDOT material test pit location markers. Mystery solved. Thanks all!
In Reply to: Re: Asking for help identifying markers posted by BobInGilroy on January 18, 2018 at 17:26:36 PST: