In Woburn, you have problems on 95 on both sides of 93, Washington Street and Route 28 both mess with the flow.The adjacent exits are part/parcel inclusive of the reconstructions. Braintree Split project area was to treat the MA 37, Washington St./Quincy Adams, and Furnace Brook Pkwy. exits bounding its three sides with extra frontage work to eliminate weaving. Canton Split was to include a dedicated I-95 offramp for University Ave. to eliminate that weave and also complete the missing Dedham St. ramps on 95. Burlington Split fix was supposed to fix the horrible geometry and partially combine ramps for US 3 and Middlesex Turnpike. Don't know if we ever got far enough into final design to see the complete picture on Woburn, but given how utterly ad hoc the Washington St. ramps are something was due to be radically reorganized there.
Maybe I have always misinterpreted the talk about a "flyover". Maybe 95 thru traffic goes onto a mega flyover and the current surface lanes become a complex of entrance/exit merge lanes for 93, Washington Street and Route 28?