For nearly four decades, LTK has amassed an extensive history of involvement with the M-series Electric Multiple Unit (EMU) rail cars, assisting the LIRR, MNR and ConnDOT during every M-series procurement, for a total of nearly 2,500 cars.
MNR and ConnDOT are embarking on a major capital program with the objective of improving rider comfort and increasing passenger-carrying capacity along the New Haven Line. This program consists of the purchase of a new fleet of Electric Multiple Unit railcars, designated the M-8 Car, which will be used to replace some existing M-2 equipment and expand the fleet to meet increases in ridership. LTK will support the Metro North and ConnDOT during the procurement process by providing a full complement of management, engineering and inspection services.
LTK helped MNR and ConnDOT define M-8 car design requirements and move the program from conceptual design and specification development through to Contractor selection. LTK prepared technical specifications, assisted with evaluations of proposals and is currently participating in the design review process.
Since 1997, LTK has supported LIRR and MNR in the procurement of Bombardier-built M-7 cars, providing design and procurement services, including car and subsystem configuration, technical specification, contractor/supplier proposal review, procurement program technical support, and quality assurance.
Like earlier M-series cars, the M-7 operates on a 750 Vdc third rail system. The M-7 cars, which replaced the M-1s, continue the design evolution of the M-series by incorporating state-of-the-art propulsion technology, including ac drive to avoid the maintenance expense associated with dc traction motors and to improve reliability. The M-7 makes widespread use of microprocessor technology, including safety-related systems such as the cab signal system. The cars also feature a cellular digital packet data (CDPD) modem to transfer information between the train and wayside for route configuration and maintenance data, and GPS triggering of automatic station announcement for passenger convenience.
LTK’s original involvement in the M-series cars began in 1967 with the procurement of the original M-1 EMUs. The M-1 and M-1a cars were developed for the LIRR and the Harlem & Hudson Lines of what is now MNR. A total of 772 M-1 Budd-built cars were purchased by LIRR and 178 M-1a GE-built cars were purchased by MNR and in service by 1973. These cars have been the workhorses of the LIRR and MNR EMU fleets for more than a quarter century.
The GE-built, M-2 cars, used on the New Haven Line, were in service by the mid-1970s. The M-2 featured design improvements including motor suspension and clean air ventilation. NJ TRANSIT Arrow II and III cars incorporated the M-2 suspension and ventilation design improvements, while SEPTA Silverliner IV also adopted the designs. The M-2 series was the first of the M cars to operate on both 600 Vdc third rail and 12kV catenary power.
The Budd-produced M-3 and M-3a cars were in service by the early 1980s, used by LIRR (M-3) and Metro-North (M-3a).
The M-4 and M-6 cars, ordered for the New Haven Line, represented design evolutions incorporating updated technology to achieve improved reliability and maintainability. The Tokyu Car built M-4 cars for Metro-North went into service in the late 1980s, while the Morrison-Knudsen-built M-6 cars were in service by the end of the 1990s.