Local Area Info: Pennsylvania Route 75

Pennsylvania Route 75 (PA 75) is a 71.2-mile-long (114.6 km) north–south state highway located in central Pennsylvania. The southern terminus is at the Mason–Dixon line in Montgomery Township, where the road continues into Maryland as Maryland Route 494 (MD 494). The northern terminus is at an interchange with U.S. Route 22 (US 22) and US 322 northeast of Port Royal. PA 75 is a two-lane undivided road that passes through the Ridge-and-Valley Appalachians in Franklin and Juniata counties. The route heads north from the Maryland border in Franklin County to Mercersburg, where it runs concurrent with PA 16 and PA 416. From Mercersburg, PA 75 heads north and crosses US 30 in Fort Loudon before it runs northeast through a long valley, where it has an interchange with the Pennsylvania Turnpike (Interstate 76 or I-76) in Willow Hill. The route turns north and heads into Juniata County, where it continues through another valley. PA 75 passes through Port Royal and crosses the Juniata River before it comes to its terminus at US 22/US 322.

PA 75 was designated in 1928 to run from US 30 in Fort Loudon north to US 22 (William Penn Highway) northeast of Port Royal. In 1937, PA 75 was extended south from Fort Loudon to the Maryland border. The route was realigned to bypass Blairs Mills on a shorter alignment to the east in the 1930s. In the 1970s, PA 75 was extended north to the new US 22/US 322 freeway on a road that was widened into a divided highway by 1990.

PA 75 begins at the Maryland border in Montgomery Township, Franklin County, where the road continues south into that state as MD 494. From the state line, the route heads north on two-lane undivided Fort Loudon Road through open agricultural areas with occasional homes. The road passes through Kasiesville before coming to Claylick and intersecting PA 995. PA 75 runs through more farmland with some woods and residences, passing through Shimpstown. The road heads through more open agricultural areas prior to entering Mercersburg, where it passes homes. PA 75 comes to an intersection with PA 16/PA 416, where it turns northwest to form a concurrency with the two routes on Buchanan Trail West. The three routes turn north onto Main Street and passes homes and businesses in the center of Mercersburg. In the northern part of town, PA 16 heads to the northwest with PA 75 and PA 416 continuing northeast on Fort Loudon Road. The road passes a few residential and commercial areas before crossing into Peters Township and heading into agricultural surroundings. PA 416 splits from PA 75 by continuing northeast on Mercersburg Road. At this point, the route runs through more open farmland with some residences, passing through Dickey. The road turns northwest to run a short distance east of the West Branch Conococheague Creek before coming to an intersection with US 30 near Fort Loudon.