The R46, a 50-year-old B division train car, is in service on the A, C, and N, R, Q, W lines; 696 of the original 754 cars were in service as of October. But its design stems directly from the ...

will begin phasing out the R46 trains and replacing them with newer, sleeker models already running on some of the city’s lines. “Old train cars break down six times as frequently as new cars ...