The new authority acquired several suburban transit bus operations including Lake Shore Coach Lines (1971), Pontiac Municipal Transit Service (1973), Dearborn's Metropolitan Transit (1974), Birmingham's Great Lakes Transit (1974), and Royak Oak's Martin Lines (1975). However, the 1967 transportation act did not provide the regional authority with any means to levy taxes. By 1974, the Detroit Department of Street Railways (DSR) had been reorganized as a city department of Detroit, leaving SEMTA only coordination over the suburban services. That same year, SEMTA acquired a commuter train service between downtown Detroit and Pontiac from the Grand Trunk Western Railroad. Due to declining ridership and a lack of funding, the commuter rail service was discontinued in October 1983.