The tunnels under the fort point channel headed to/from Logan Airport are set up incorrectly, resulting in a variety of URs (I’ve submitted some of them, since this error affects my usual commute). Specifically, this interchange doesn’t exist: https://www.waze.com/editor/?zoom=6&lat=42.34757&lon=-71.04963&mapUpdateRequest=3539550&env=usa&layers=773&segments=66292817,66127779,63210216
The actual route is a combination of the proposed options if you route from Melnea Cass Blvd, Boston, MA to 1 Harbor St, Boston, MA (ie, none of them are correct but all have elements of correctness).
Comparing the Waze map against Google maps, I believe Google has the routing of the various tunnels correct. I’m happy to help sort it out as well, I’ve traced through the tunnels and I think I know which ones are wrong (I’m rank 1, so I can’t change any of it).