Metro-North Railroad's Danbury Branch is a diesel branch of the 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 the branch originally had passenger service from Danbury to Canaan, Connecticut, to Pittsfield, Massachusetts. Metro-North took over operation of the line from Conrail in 1983.