Governor Ned Lamont (D), Commissioner Eucalitto, Senator Richard Blumenthal (D-CT), Congresswoman Rosa DeLauro (D-CT-3), Derby Mayor Joseph DiMartino (D), Federal Transit Administration Regional Administrator Peter Butler, Metro-North Railroad President Justin Vonashek, and Naugatuck Valley Council of Governments Executive Director Rick Dunne mark the start of construction. (Molly Ingram / WSHU)Upgrades are underway at four train stations in the…