purchased between 1914 and 1924, 2 of them being replacements for 2 others that were damaged in a collision. 100 motorized cars were ordered every year from 1914 to 1922, and 50 unpowered trailer cars were ordered in 1924. 2 additional cars were delivered as part of the 1919 order to replace 2 cars (2208 and 2274) that had been damaged the previous year. As delivered, all 902 motor cars were "singles", meaning that each could be run entirely by itself if so desired. Trains would be made up of singles coupled together. However, many cars as delivered in later years were immediately coupled into units as indicated below. The first run of the cars was not until early 1915 when several units specially equipped with trolley poles test operated on the Sea Beach Line prior to its formal opening as a subway line, which took place on June 22, 1915. The poles were also used to move the cars around the 39th St. Shops where they had been originally delivered in 1914. Cars so equipped were 2000, 2001, 2010, 2021, 2042, 2050, 2051, 2054, 2060, 2071, 2087, and 2092. After June 22, 1915, the A/B Standards operated regular subway service. Trolley poles were removed from those cars which had been specially equipped. During their service lives, the A/B Standards saw service on all four routes serving Coney Island: the West End Line, Culver Line, Sea Beach Line, and Brighton Line. They also ran in the Fourth Avenue Subway, the Broadway Subway, and on the Astoria Line, as well as parts of the BMT's "Eastern Division", which includes the Broadway–Brooklyn/Jamaica Line, Broadway–Myrtle Ave. Line, Nassau Street Subway, and the 14th Street–Canarsie Line. Beginning December 1, 1955, well into their service lives, the cars also saw service on the IND Queens Boulevard Line once the 60th Street Tunnel Connection was completed and BMT Brighton Local service was extended to Forest Hills–71st Avenue in Queens (some units had operated on this line to 179th St. during the 1957 motormen's strike). In 1958, a brief test was conducted using a train of these cars in IND F service between Jamaica–179th St. and Broadway–Lafayette St. Several significant modifications were made during the cars' period of service. In approximately 1919 and 1920, the passenger compartment of the oldest cars was upgraded to add fans, additional lighting, and more places for standees to hold on. Also