letter is used for no other line. Railroad north on this line is towards Manhattan, and corresponds roughly to a northwesterly to westerly compass direction. 2004 chaining revision Prior to 2004, the chaining on the Canarsie Line reflected its historic origin. The original elevated right-of-way from the point where it split with the old Fulton Street Elevated at Pitkin and Van Sinderen Avenues in 1906 was designated as BRT chaining line P, and chaining zero for that section was at the same location. The portion of the 14th Street–Canarsie Line built or rehabilitated under the Dual Contracts and opened in 1924 and 1928 was designated BMT Q beginning at Sixth Avenue and 14th Street in Manhattan and extending to the beginning of BMT P chaining at Pitkin Avenue. Chaining zero for the BMT Q chaining line was also at Sixth Avenue. When the line was extended to Eighth Avenue in 1931, chaining zero for the BMT Q chaining line was not moved. Rather than change all the signal designations and chaining stations on the line, the new section was extended west from the same zero and designated chaining line BMT QW. When the installation of automated train operation required the complete replacement of the signal system, the MTA decided to make the entire line BMT Q and move chaining zero to the current compass western end of the line. Therefore, the chaining station of every location on the line had to be changed, a situation rarely seen since the Dual Contracts changes on the old BRT circa 1920. Station listing References External links Railroad History Database NYCsubway.org – BMT 14th Street-Canarsie Line (text used with permission) Brooklyn–Manhattan Transit Corporation New York City Subway lines