6. Lexington Avenue Line
Image via Wikimedia Commons
This line, not to be confused with the IRT Lexington Avenue line, was the first standard elevated rail line in Brooklyn, which began running on May 13, 1885 from Washington and York Streets to Gates Avenue. This line was short lived because on April 27, 1889, the Lexington el began using the Myrtle Avenue Elevated line.
Service on the Lexington Line was not completely abandoned until October 1950. From 1904 to 1950, the Lexington Line basically ran on the elevated Broadway line. In the 1950s, ridership decreased because of the Myrtle Ave el and and underground line running under Lafayette Avenue, so the Lexington el was dismantled.