 In 1954, the northern terminus was truncated to the intersection of Washington Ave. and PA 28 (Miller's Run Road, changed to PA 50 in 1961) in South Fayette Township.In 1972, the northern terminus (including the remaining segment in Allegheny County) was moved one last time to its current location at PA 50 in Mount Pleasant Township.Pennsylvania Route 519 Truck is a 21.5 mile truck route bypassing a weight-restricted bridge over a branch over Chartiers Run on PA 519 in Chartiers Township, on which trucks over 33 tons and combination loads over 37 tons are prohibited.