Discontinuances in the 1920s and 1930s primarily affected minor branches and rural intercity routes, but the 1950s saw the loss of more significant intercity routes. September 1952 saw the first cut to the four main intercity mainlines, as Eastern Route service was cut from Portland, Maine to Portsmouth, New Hampshire. (Portland continued to see service to Boston on the Western Route through Dover, New Hampshire.) The New York–Montreal "Green Mountain Flyer"/"Mount Royal", which had Boston sections running on the B&M via Bellows Falls, ended when the Rutland Railroad cut all passenger service in 1953. The northern section of the Boston–Wells River, Vermont route ended in 1954 (thus ending connections to Quebec City), as did Manchester–Portsmouth service. Concord–Claremont Junction service ended in 1955, and the Boston section of the "Ambassador" was reduced to a Boston–White River Junction RDC connecting train in 1956. Fitchburg mainline service was trimmed from Troy, New York, to Williamstown, Massachusetts, in January 1958.