Boston and New York than all airlines combined (about 54% of market share in 2012), but service between other cities is less frequent. There, more frequent intercity service is provided by private bus carriers, including Peter Pan Bus Lines (headquartered in Springfield), Greyhound Lines, OurBus, BoltBus and Plymouth and Brockton Street Railway. Various Chinatown bus lines depart for New York from South Station in Boston. MBTA Commuter Rail services run throughout the larger Greater Boston area, including service to Worcester, Fitchburg, Haverhill, Newburyport, Lowell, and Plymouth. This overlaps with the service areas of neighboring regional transportation authorities. As of the summer of 2013 the Cape Cod Regional Transit Authority in collaboration with the MBTA and the Massachusetts Department of Transportation (MassDOT) is operating the CapeFLYER providing passenger rail service between Boston and Cape Cod. Ferry Ferry services are operated throughout different regions of the states. Most ports north of Cape Cod are served by Boston Harbor Cruises, which operates ferry services in and around Greater Boston under contract with the Massachusetts Bay Transportation Authority. Several routes connect the downtown area with Hingham, Hull, Winthrop, Salem, Logan Airport, Charlestown, and some of the islands located within the harbor. The same company also operates seasonal service between Boston and Provincetown. On the southern shore of the state, several different passenger ferry lines connect Martha's Vineyard to ports along the mainland, including Woods Hole, Hyannis, New Bedford, and Falmouth, all in Massachusetts, as well as North Kingstown in Rhode Island, Highlands in New Jersey, and New York City in New York. Similarly, several different lines connect Nantucket to ports including Hyannis, New Bedford, Harwich, and New York City. Service between the two islands is also offered. The dominant companies serving these routes include SeaStreak, Hy-Line Cruises, and The Steamship Authority, the latter of which regulates all passenger services in the region and is also the only company permitted to offer freight ferry services to the islands. Other ferry connections in the state include a line between Fall River and Block Island via Newport, seasonal ferry service connecting Plymouth to Provincetown, and a service between New Bedford and Cuttyhunk. Rail freight As of 2018, a number of freight railroads were operating in Massachusetts, with Class I railroad CSX being the largest carrier, and another Class 1, Norfolk Southern serving the state via its Pan Am Southern joint partnership. Several regional and short line railroads