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  • Summary An old number for parts of today's Route 184, Route 201 and SR 627 in southeastern Connecticut.
  • From c. 1925
  • To Jan. 1, 1932

State Highway 331 followed today's Route 184, from the Gold Star Bridge to Route 201; then northeast along Route 201 and SR 627 to Route 2. This was the original routing of Route 184, and most of it was renumbered 84 (the former 184) in 1932.