For years I've been wondering about the random brick segments inserted into the pavement of the Farmington Canal, which is part of the East Coast Greenway.

Now, I'm not talking about decorative sidewalks, but rather small segments of brick surrounded by the black pavement that makes up the main part of the trail.

These segments are generally squarish or rectangular, and usually run from the edge of the trail to the the center.

They're usually not longer than six bricks or so.

Anyone know what they signify? Are they supposed to be decorative?

Just been wondering for the longest time, so I thought I'd ask.