Gridlocked - 7/24/19

Another posting from Ol'Fogie today, while I'm off on my cache-cation.  He says:

There are lots of grid-based puzzle types out there. But a fellow cacher brought 

this North Carolina diddy to my attention the other day and I had not seen this

 type before. Given the method to solve it, the grid could really be any size

 depending on what you wanted to tell the solver; this one just happens to be...

8 X 8

Tomorrow we'll...