Is there a language option in the Sync? Selecting British English will probably change the nomenclature to this or similar. My Garmins will do this with different voices. I like how the Aussie girl sounds in the Garmin.
Brit multi-lane highways are
dual carriageways if there's a dividing strip. A carriageway lacks the dividing strip. But I30 is a
motorway (limited access), a type of carriageway.
Assuming Texas has divided highways.
-- Chuck