The R16 was a New York City Subway car model built by the American Car and Foundry Company from 1954 to 1955 for the IND/BMT B Division. A total of 200 cars were built, arranged as single units. Two versions were manufactured: Westinghouse (WH)-powered cars and General Electric (GE)-powered cars.

The R46 is a New York City Subway car model that was built by the Pullman Standard Company from 1975 to 1978 for the IND/BMT B Division. They replaced all remaining R1–9 fleet cars and General Electric-powered R16s, and some R10s. The R46 order initially consisted of 754 single cars, each 75 feet (23 m) long, and was the largest single order of passenger cars in United States railroad history at the point of the fleet's completion. The R46 was the second order of 75-foot cars to be ordered for the New York City Subway, after the R44s.