The charter for this railway entered the planning phase by January 1890, with a target filing date of February 8 of that year, and was originally to be called the Arlington Avenue Inclined Plane.[2] The last day of service was December 3, 1960,[3] and it was demolished before the year ended.[4] It was designed by John H. McRoberts, with a length of 2644 feet.
The Knoxville Incline and the nearby Mount Oliver Incline enabled the development of land in Allentown and surrounding communities on the hilltop. Like the Nunnery Hill Incline, the Knoxville Incline featured a curve, an unusual engineering feat for an incline.
Fatal accident
On October 7, 1953 a boy, Alan Schiller, hanging from a car was killed. While it is commonly reported that Pittsburgh inclines recorded no fatalities, this, along with an incident on the St. Clair Incline, provide the only blemishes on the safety record of inclines in Pittsburgh.[6] None of the fatalities occurred with paying passengers who had not jumped from cars.
^Hadley, S Trevor (1994). "Chapter 3: Inclined to Disaster (1909)". Only in Pittsburgh. educational publishing resources. pp. 19–22. ISBN0-9642251-0-7.