Third Avenue El tracks over Gun Hill Road, viewed from the Gun Hill Road station of the IRT White Plains Road line, June 1, 1928. The view is westward, across the Bronx River to Webster Avenue, where the Third Avenue El turns southward to Manhattan. This spur carried connecting trains between 1920 and 1973.

In 1912, a commuter railway known as the New York, Westchester, and Boston Railway Company (NYW\&B) operated a comfortable and luxurious all-electric service between Mott Haven in the Bronx and Port Chester in Westchester. With the rise of the automobile in the 1920s, the NYW\&B's popularity never caught on. The Railway's station houses boast a variety of architectural styles, and have been largely repurposed to serve the IRT Dyre Avenue Line.