The New Haven had plans to electrify some southside commuter lines, and some infrastructure was built, including lower-level loop platforms at South Station.
 However, the only electrification that actually took place was on the South Shore and Nantasket Beach lines.
 The Nantasket Beach line was electrified in 1895, and trolley service ran on the line until 1932.
 Between 1896 and 1899, the South Shore was electrified from Braintree to Cohasset, with an unusual center-of-the-track third rail.
 However, the third rail was dangerous at grade crossings, and the South Shore returned to steam-only service in 1902.

The double track was extended to Greenbush station in Scituate by 1911, and the station was used as the terminus for many short turn commuter trains.
 In 1911, service on the line included 8 trains to Plymouth via Kingston, 5 Greenbush short-turns, and 9 Cohasset short-turns.

Under the control of the New Haven Railroad, the South Shore Line and others set all-time records for number of passengers.
The popularity of the train was short-lived, however.
 Cutbacks in service due to World War I were not reversed afterwards, due to the increasing popularity of the automobile.
 The New Haven Railroad went bankrupt in 1935 and only kept a few passenger trains running because of a court order directing it to do so.
 Service south of Greenbush, limited to a single South Duxbury round trip since 1932, was discontinued in 1939, after the 1938 New England hurricane damaged the causeway over the North River to Marshfield.

The railroad enjoyed a brief uptick in traffic in World War II with the construction of the Hingham Naval Ammunition Depot and the Hingham Naval Ammunition Depot Annex.
The number of daily trips was increased from 4 to 8 after World War II under Frederick C. Dumaine, Jr., and modern diesel trains including Budd RDCs were introduced in the 1950s.
However, the New Haven Railroad continued to lose money on the service, and after Dumaine was ousted the railroad announced all trains would cease running in 1958.
Only an emergency subsidy by the state kept trains running until June 30, 1959 when the Southeast Expressway opened and all passenger train service ended.
Freight trains continued to use the line as far south as the Hingham Lumber Yard located, where the Nantasket Junction station now exists, until 1979.
All service was terminated in 1983.
The New Haven had plans to electrify some southside commuter lines, and some infrastructure was built, including lower-level loop platforms at South Station.  However, the only electrification that actually took place was on the South Shore and Nantasket Beach lines.  The Nantasket Beach line was electrified in 1895, and trolley service ran on the line until 1932.  Between 1896 and 1899, the South Shore was electrified from Braintree to Cohasset, with an unusual center-of-the-track third rail.  However, the third rail was dangerous at grade crossings, and the South Shore returned to steam-only service in 1902.
The double track was extended to Greenbush station in Scituate by 1911, and the station was used as the terminus for many short turn commuter trains.  In 1911, service on the line included 8 trains to Plymouth via Kingston, 5 Greenbush short-turns, and 9 Cohasset short-turns.
Under the control of the New Haven Railroad, the South Shore Line and others set all-time records for number of passengers. The popularity of the train was short-lived, however.  Cutbacks in service due to World War I were not reversed afterwards, due to the increasing popularity of the automobile.  The New Haven Railroad went bankrupt in 1935 and only kept a few passenger trains running because of a court order directing it to do so.  Service south of Greenbush, limited to a single South Duxbury round trip since 1932, was discontinued in 1939, after the 1938 New England hurricane damaged the causeway over the North River to Marshfield.
The railroad enjoyed a brief uptick in traffic in World War II with the construction of the Hingham Naval Ammunition Depot and the Hingham Naval Ammunition Depot Annex. The number of daily trips was increased from 4 to 8 after World War II under Frederick C. Dumaine, Jr., and modern diesel trains including Budd RDCs were introduced in the 1950s. However, the New Haven Railroad continued to lose money on the service, and after Dumaine was ousted the railroad announced all trains would cease running in 1958. Only an emergency subsidy by the state kept trains running until June 30, 1959 when the Southeast Expressway opened and all passenger train service ended. Freight trains continued to use the line as far south as the Hingham Lumber Yard located, where the Nantasket Junction station now exists, until 1979. All service was terminated in 1983.
Greenbush Line