Heard back from MEDOT. Looks like no build on this one:
Your questions regarding routed highways in Houlton was forwarded to me. I’ve attached a map below showing the formal routes in Houlton. I believe this is similar to what you’ve seen on MapViewer. We’ll review signage in the area to see if we can make improvements to minimize confusion. Hopefully this answers your question. Please let me know if you have additional questions.
The map matches the routing in the HB.