The
New York City Subway's
B Division consists of the lines that operate with lettered services (, , , , , , , , , , , , and ), as well as the
Franklin Avenue and
Rockaway Park Shuttles. These lines and services were operated by the
Brooklyn–Manhattan Transit Corporation and city-owned
Independent Subway System before the 1940 city takeover of the BMT. B Division rolling stock is wider, longer, and heavier than those of the
A Division, measuring by .