Location(s)

            Between Lilly and new US Route 22 west of Cresson, the route of the Allegheny Portage Railroad follows the township road.  It has not been altered extensively, and has maintained the geometry and scale of the original APRR.  Even though this has been an automobile road for at least 80 years, the curves are still “flat” as they would have been originally built for the railroad.  The curves of modern roads, including railroads, are superelevated, that is, the outside edge of the curve is higher than the inside edge.  Superelevation mitigates the effects of centrifugal force as vehicles motor around the curves, giving drivers better control.  “Flat” curves are a good clue that a modern road was once of the APRR.