New Technology Train

New Technology Train (NTT) is the collective term for the modern passenger fleet of the New York City Subway entering service since the turn of the 21st Century. This includes the current R142, R142A, R143, R160, and R188 models, the R179 model currently under construction, and the planned R211 model. Two prototypes, the R110A and R110B, were used to test the features that would be found on all NTT trains today. Sometimes referred to as New Millennium Trains, they are known for improvements in technology, energy efficiency, reliability, and comfort along with advanced passenger information systems. Much of the engineering and construction efforts for the fleet have been done by and Bombardier Transportation. Alstom also helped to build some of the trains, specifically the R160A.

This is a list of all NTT trains operated by the New York City Subway, as well as future trains and retired trains.

The New Technology program emerged from modernization efforts by the Metropolitan Transportation Authority (MTA) beginning in 1982, when the subway "was on the verge of collapse". The New Technology program officially began in 1988, the first effort at a technologically-advanced subway car since the R44 in the early 1970s. In 1989, the MTA awarded contracts for two prototype test trains: the R110A (contract R130) for the A Division built by , and the R110B (contract R131) for the B Division built by Bombardier Transportation. The two New Technology test trains (NTTTs) began service in June 1993, testing features that would be implemented on future mass-production orders. Both trains were taken out of service by 2000, due to multiple issues with the trains.

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