Southeast Area Transit is a provider of local bus service in eight towns and two cities in the southeastern portion of the U.S. state of Connecticut: East Lyme, Griswold, Groton, Ledyard, Montville, New London, Norwich, Stonington, and Waterford. Under contract to Amtrak, SEAT also provides Amtrak Thruway service from New London to Foxwoods.

New London Union Station is a railroad station on the Northeast Corridor located in downtown New London, Connecticut, United States. Union Station is a station stop for most Amtrak Northeast Regional trains and all CTrail Shore Line East commuter rail trains, making it the primary railroad station in southeastern Connecticut. It serves as the centerpiece of the Regional Intermodal Transit Center, with connections to local and intercity buses as well as ferries to Long Island and Fishers Island, New York, and Block Island, Rhode Island. The station has one side platform and one island platform serving the two-track Northeast Corridor; the latter platform also serves a siding track that connects to the New England Central Railroad mainline.