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| Pennsylvania Route 36 | |
|---|---|
| State | PA |
| Type | PA |
| Route | 36 |
| Length mi | 206.0 |
| Established | 1928 |
| Direction a | South |
| Terminus a | West Virginia |
| Direction b | North |
| Terminus b | Erie |
| Counties | Greene; Fayette; Westmoreland; Indiana; Jefferson; Clarion; Armstrong; Butler; Venango; Crawford; Mercer; Erie |
Pennsylvania Route 36 is a long north–south state highway traversing western and northwestern Pennsylvania from the West Virginia border to the city of Erie. The route links rural communities, boroughs, and regional centers while intersecting major corridors such as U.S. Route 40, Interstate 70, Interstate 76, U.S. Route 19, and U.S. Route 6. PA 36 serves local industry, tourism destinations including portions of the Allegheny National Forest, and transportation networks connecting to Ohio and New York.
PA 36 begins at the West Virginia–Pennsylvania border near Scottdale and proceeds north through the Allegheny Plateau and the southwestern coalfields of southwestern Pennsylvania, passing close to communities such as Uniontown, Connellsville, and Youghiogheny River corridors. The highway intersects major routes including U.S. Route 40, Interstate 76 near Somerset, and Interstate 79 approaches northward toward Butler and Slippery Rock. In Butler County the route aligns near Butler Regional Airport and intersects U.S. Route 422, continuing through mixed agricultural and wooded terrain toward the Clarion River and the Allegheny National Forest. Approaching northwestern counties, PA 36 connects to Punxsutawney-area routes, crosses the Allegheny River, and proceeds into Erie where it terminates after joining urban arterials that link to Interstate 90 and the Port of Erie. Along its length PA 36 passes near landmarks such as Venango County sites, historic districts in Indiana County towns, and recreation areas within the Cook Forest State Park region.
The corridor that became PA 36 follows early 19th-century turnpikes and wagon roads used during the expansion of Allegheny County settlements, the 19th-century lumber boom epitomized by companies in Clarion County and the oil discoveries in Venango County near Titusville. Designated in 1928 as part of Pennsylvania's numbered state routes, PA 36 was realigned multiple times during the 20th century to accommodate the construction of Pennsylvania Turnpike segments, improvements tied to the New Deal era road programs, and postwar highway modernization influenced by the Federal-Aid Highway Act of 1956. Sections of PA 36 were widened or bypassed near industrial centers in Westmoreland County during the 1950s and 1960s to improve access to Monongahela River valley manufacturing sites. Later infrastructure projects in the 1980s and 1990s addressed safety on mountainous stretches near the Laurel Highlands and environmental concerns adjacent to protected areas like Allegheny National Forest and state parks tied to the Civilian Conservation Corps legacy.
PA 36 intersects a sequence of regional and national highways that facilitate cross-state travel: near its southern approach it meets U.S. Route 119, joins corridors with U.S. Route 40 and crosses the Turnpike; farther north it intersects Interstate 70 and Interstate 79; in central segments it crosses U.S. Route 422 and connects with Pennsylvania Route 28; northern reaches intersect U.S. Route 6, U.S. Route 19, and urban arterials linking with Interstate 90. These intersections link PA 36 to regional hubs including Pittsburgh, Erie, Johnstown, and Mercer and to corridors toward Cleveland and Buffalo.
Along its length PA 36 has featured temporary alignments, truck routes, and business loops serving downtowns such as those in Butler and small borough centers in Jefferson County and Clarion County. Truck bypasses were implemented near steep grades and tight curves in the Allegheny Plateau to accommodate freight movement to facilities linked with Conrail and later Norfolk Southern Railway. Occasional seasonal detours have coordinated with state park operations at Cook Forest State Park and flood-response plans involving county emergency management offices like those in Venango County.
Traffic volumes on PA 36 vary from higher urban counts near Erie and Butler to low-density rural flows in Fayette County and Crawford County. Maintenance responsibilities fall to the Pennsylvania Department of Transportation, with winter operations coordinated with county road crews in Greene County and Mercer County. Safety initiatives along PA 36 have involved grant-funded pavement rehabilitation, bridge replacements prioritized under programs influenced by U.S. Department of Transportation policies, and corridor studies reflecting recommendations from regional planning commissions such as the Northwest Pennsylvania Regional Planning and Development Commission.
Planned and proposed projects affecting PA 36 include pavement resurfacing, bridge modernization funded through state capital programs, and corridor safety improvements tied to federal competitive grants administered by the Pennsylvania Department of Transportation. Initiatives under consideration involve interchange upgrades where PA 36 meets interstate routes near Interstate 79 and Interstate 76 to enhance freight efficiency connecting to facilities serviced by Port of Pittsburgh Commission and the Port of Erie. Environmental permitting for expansions adjacent to the Allegheny National Forest requires consultation with the U.S. Forest Service and adherence to state conservation statutes, while multimodal planning seeks coordination with transit providers such as Port Authority of Allegheny County and regional airport authorities.