So, I assumed that one of the gas companies was expanding their customer base and would be soon digging up the street yet again. But these markings were odd and pointed to a location where there was only a stand of trees. Perhaps the squirrels and birds in that location had saved up and were planning for a very warm winter.
The initial markings on the street cryptically stated: MDOT-sign. Soon, these were followed by more colorful signs suggesting that there were no underground utilities in the location and that it was apparently save to dig here. What followed - the signs
I have yet to figure out what the C.O.A might be - I'm hoping this post might generate some response. Some hint comes from the larger sign that appears below the "To Reverse Direction" sign which reads, "Controlled Access Highway - Official Highway Signs Only."BTW, this intersection is one of those famous "tea cup handle" arrangements where traffic heading in one direction on Western Avenue (a major road that has a center island preventing u-turns or crossing traffic except at intersections) can "reverse direction" without driving into some businesses' parking lot which they do anyway, despite the signs. I always thought these signs - "to reverse direction" - were rather enigmatic and perhaps a bit philosophical. Way too complicated for the average American with a 5th grade reading level to figure out.
Your guess is as good as mine.
In the meantime, the mystery continues. Post something if you got an idea!