Island runs off the Maine coast and in Fishers Island Sound, car ferries across Lake Champlain and a barge on the Connecticut: short crossings that stand in for a road or a bridge.
More than half of the New England crossings here work the Maine coast, and no two of them are organized the same way. Portland's boats to Peaks Island and to Great Diamond Island belong to the same public island transit district and leave from the same terminal, because both islands lie inside the city limits; Great Diamond is the one with two landings, each on its own timetable, one of them below the old Fort McKinley. Isle au Haut's mailboat out of Stonington is run by a non-profit and calls at the village all year, adding Duck Harbor, on the Acadia National Park side, in season. Across Frenchman Bay, the Winter Harbor run is a private company's seasonal boat in which the Maine DOT plays no part.
Lake Champlain Ferries works two car crossings between Vermont and New York. Charlotte–Essex, the southern one, keeps going through the winter unless bad ice or a north wind shuts it; Grand Isle to Cumberland Head, further north, is the shorter hop and runs through the night. On the Connecticut River, CTDOT crews the Rocky Hill barge itself, from spring to the end of November whenever the water allows, on a crossing Connecticut dates to 1655. Fishers Island is the odd one out: it is part of New York, yet the public boat to it sails from New London, in Connecticut, under a district whose board the islanders vote for.