In the south, the original New England Route 32 ran along present day Route 12 from Groton to Norwich. The modern alignment from New London to Norwich used to be part of New England Route 12. (Route 12 and Route 32 have basically swapped places south of Norwich).
In the southern region, the original route 32 ran along present-day Route 12 from Groton to Norwich. The modern alignment from New London to Norwich was previously part of Route 12. (Route 12 and Route 32 have swapped positions south of Norwich).