The Danbury Branch is a diesel branch of the Metro-North Railroad New Haven Line from downtown Norwalk, Connecticut north to Danbury, mostly single-tracked. It opened in 1852 as the Danbury and Norwalk Railroad. Until the early 1970s, passenger service continued north from Danbury to Canaan, Connecticut and Pittsfield, Massachusetts. Metro-North took over operation of the line from Conrail in 1983.