A short history of MA highway signs

For years, the logo of the Massachusetts Turnpike was a Pilgrim's hat with an arrow through it.  But back in 1989, a second-grade class in Amherst began a campaign to remove the arrow, feeling it was disrespectful to the Native Americans who had lived in the state.  They were successful, and the logo no longer contains the arrow.

Now, some underground sign designer has gone further and has provided this addition to one of the signs on the Massachusetts highway system.  It seems to be his or her way of saying, "Let's never forget who was here first."