As the city grew and changed, Olmsted and Vaux’s design for Morning Side Park changed with it. In their first plan of 1873 the grandest of the park entrances was to be at the corner of Manhattan Ave and West 110th Street (Cathedral Parkway). This corner was closest to the northwest corner of Central Park just a short block away and one can imagine the designers envisioning park goers strolling back and forth between the two parks. Here we see a major change that most certainly made them rethink that approach. This 1879 eastward looking view of the elevated train tracks built along 110th Street just south of what would become Morningside Park, show what a changed prospect now presented itself to the designers. Olmsted and Vaux’s second 1887 plan for the park took into account this dramatically changed condition. It retained but played down the southern entrance and made more of the grand staircase leading into the middle of the park from Morningside Drive at 116th Street.

110th Street Curve, also known as “suicide curve,” 1913. In 1879, the elevated tracks of the IRT Ninth Avenue Line were extended northward from the 104th Street station. At 110th Street, the trestle turned 90 degrees to the right on 110th Street, before turning uptown again at Eighth Avenue. The 110th Street station and adjacent tracks earned the nickname “suicide curve,” as the high elevated railway had become a destination for jumpers. In 1927, the New York Times reported that local business owners were concerned that the curve’s reputation was a deterrent to customers. The Ninth Avenue El ceased operations in June, 1940, and the railway was dismantled shortly thereafter. While many sources claim the tracks stood a dizzy 100 feet above street level, a 1940 dispatch in the New York Times quoted the project superintendent overseeing the trestle's demolition, who claimed a maximum height of 56 feet. Today, the elevated tracks former right of way is still visible at the southeast corner of 110th Street and Columbus Avenue: older buildings are set back from the corner, while more recent single-story construction occupies the land once underneath the tracks.

Elevated railroad at 110th Street and 8th Avenue, ca. 1895.