On the triangle, if you have driven by this week maybe you saw one side of the sign.
If you didn't go back the same way, maybe you did not see the other side of the sign
With the eventual reconfiguration of this intersection to allow two way traffic on Main St, I expect these signs will go away. I recall from one of the preparation meetings, there is a plan for the historical water trough. It wasn't always here and can be re-located.
I hope it finds a good place. It is one of the connections to where I grew up, down the road a piece in Pawtucket, RI.