For some reason, this ramp has a red arrow at the far eastern end for access onto I-90 East. This prevents Waze from using the ramp to route to I-90 East from south of the city. (It routes you onto local roads downtown and to the on-ramp in South Boston)
Awesome. Thanks! (I’ve gotten that odd out-of-the-way routing twice, and it took me at least 10 minutes of making sure that ramps existed to figure out what the problem was)