Macbeth To Boston?

No, not a hint of a new production coming...or maybe it is?  This morning while waiting for my commuter rail train (at the Anderson/Woburn station, for the locals), I noticed that somebody had slapped a Macbeth sticker over the word INBOUND, so that one of the billboards read MACBETH TO BOSTON.  I was intrigued, but the sticker had nothing on it other than the one word, and a little double triangle symbol like you might see on a train or airplane logo of some sort.