So the Q checked with DOT to see what's up, and got this response:
While the main part of the implementation isn't for a few months, the project requires realigning the north and west crosswalks which are currently a brick material (having to remove an unusual crosswalk material is fairly unusual among our projects and requires advance work). So the workers you'll see this week at night are removing that material and will replace the crosswalks with asphalt and temporary markings in their existing configuration. I believe the main implementation (meaning intersection redesign) will start in June.
Translation: Don't be too disappointed if you see the old unsafe scenario reappear after this phase is completed. The bulk of the project is happening down the road (so to speak).