New Technology Train (NTT)[1][2][3] is the collective term for the modern passenger fleet of the New York City Subway that has entered service since the turn of the 21st century. This includes the current R142, R142A, R143, R160, R179, R188 and R211 models, along with the planned R262 and R268 models. 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,[4] they are known for improvements in technology, energy efficiency, reliability, and comfort along with advanced passenger information systems. All of these trains are capable of operating with communications-based train control (CBTC)—which can allow for automatic train controls and compatibility with updated signal systems—and either already have CBTC or are scheduled to be retrofitted with the system.[5][6] Much of the engineering and construction efforts for the fleet have been done by Kawasaki Heavy Industries and Bombardier Transportation, with Alstom also participating in the construction of the R160 fleet.
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