In Bradford County, PA 14 provides access to Grover, then forms a short concurrency with PA 414, splitting up in Canton. North of Canton, PA 14 passes through Alba before serving as the west terminus of PA 514 south of Troy. At Troy, PA 14 joins with US 6. PA 14 then splits off to the north to Columbia Cross Roads. PA 14 then runs through Snedekerville, Gillett, and Fassett before crossing the New York state line and becoming NY 14.
By 1940, US 111 was redesignated as US 15. As in previous years, PA 14 remained concurrent with the roadway now carrying US 15 to Northumberland. From Northumberland south to Duncannon, PA 14 was realigned onto the western bank of the Susquehanna River, creating an overlap with US 11. At Duncannon, US 11 split from PA 14 and crossed the Susquehanna while PA 14 continued south along the riverbank to Lemoyne, a suburb of Harrisburg. Here, PA 14 joined US 11 on a brief overlap east across the Susquehanna into Harrisburg. At Front Street, US 11 turned north while PA 14 continued east on Market Street. PA 14 then turned right onto 4th Street, following Mulberry and Derry Streets out of Harrisburg to Paxtang, where PA 14 terminated at US 322 and US 422.[7][8] In 1941, PA 14 was rerouted to the east side of the Susquehanna River from Muncy to Clarks Ferry on what is now Interstate 180 and PA 147; the US 15 designation was moved west to run concurrent with US 11. From Clarks Ferry to Harrisburg, PA 14 was concurrent with US 22 and US 322.[9][10][11] By 1960, PA 14 was truncated to end at US 22 and US 322 in Clarks Ferry. Eliminating the concurrency with US 22 and US 322 along Front Street. This would also remove the PA 14 designation on 4th Street, Mulberry Street and Derry Street from Harrisburg to Paxtang. [12]
In 1963, the Susquehanna Riverbank extension of PA 14 became PA 147. PA 14 was truncated to terminate at US 15 in Trout Run.[13][14]
^Pennsylvania state map(PDF) (Map). Pennsylvania Department of Highways. 1930. Archived from the original(PDF) on July 5, 2011. Retrieved September 6, 2007.