The M2, M4 and M6 were three similar series of electric multiple unit rail cars produced by the Budd Company (M2), Tokyu Car Corporation (M4), and Morrison-Knudsen (M6) for the Metropolitan Transportation Authority (MTA) and the Connecticut Department of …

They were designed to achieve 100 mph (161 km/h) running in service, achieving only 80 mph (129 km/h) in service due to track and signaling limitations. The LIRR cars also featured support for Automatic Train Operation, although this, too, was never seen in service.

2025年3月12日 · The LIRR originally got the M3 in 1983, Metro North got the M4 in1987, as well as the M6 in 1993. Was the LIRR supposed to get an "M5" around the same time period? Was it supposed to be a variant of the M1/M3?

2011年12月29日 · What did the LIRR move into and out of Mitchel AFB? During WWI and WWII the location buzzing with military activity and the old Central road running right there was still active. Maybe no visible shipments such as planes and tanks, but probably munitions and other military equipment shipped in standard box cars.

The M8 is an electric multiple unit railroad car built by Kawasaki for use on the Metro-North Railroad New Haven Line and the CT Rail Shore Line East. The fleet of 471 cars first entered service in 2011, replacing the M2, M4 and M6 cars, which entered service in 1973, 1987 and 1994, respectively. [9] .

The M7 is an electric multiple unit railroad car built by Bombardier for use on the MTA's Long Island Rail Road (LIRR) and Metro-North Railroad. With delivery beginning in 2002, the M7 replaced the M1 railcars on both railroads as well as the ACMUs on Metro-North.

2024年12月19日 · The M2, M4, M6 and M8 cars have overhead electrical connections used exclusively by MNRR Connecticut services. The LIRR capital program has ordered M9A cars to replace the remaining M3 fleet between 2025-2029.

2011年3月5日 · The M4's are generally the least preferred equipment to run according to many engineers with whom I've spoken and from comments that I've read. Though all of the M2's, M4's and M6's have the same Schedule 26 GRB-1 braking systems, it's my understanding that the M4's require a lot more braking effort to comply with a signal downgrade.

纽约长岛铁路（全称Long Island Rail Road，缩写为LIRR）运营连接曼哈顿与布鲁克林、皇后区和整个长岛的火车线路。 LIRR是MTA的一部分，也是美国最繁忙的通勤铁路公司。

2008年6月30日 · The M7 was built as two separate but similar models due to the different electrical and signaling systems on the LIRR and Metro-North. Their most notable differences are in third rail shoe design between the M7 and M7A.