The R179 is the newest "New Technology Train" to enter service on the New York City Subway. These 60 foot long subway cars first entered service in 2017 and as of December 2019, all 318 cars that are part of this order had been delivered. Although they look similar to the R160A and R160B trains, the R179 cannot be operated with other NTT train types. The R179s feature upgraded HVAC systems and additional handholds, among other upgrades in comparison to the older NTT cars.