On July 29, 1911, NH began electric service on its Harlem River Branch, a suburban branch that would become a main line with the completion of the New York Connecting Railroad and its Hell Gate Bridge.
Den 29. juli 1911 begyndte NYNH&H's elektriske tog at køre på deres Harlem River Branch, en forstadsforgrening, som blev en hovedbane med fuldførelsen af New York Connecting Railroad og dens Hell Gate Bridge.