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| Pennsylvania Route 31 | |
|---|---|
| State | PA |
| Type | PA |
| Route | 31 |
| Direction a | West |
| Terminus a | near West Newton |
| Direction b | East |
| Terminus b | near Bedford |
| Counties | Westmoreland; Fayette; Somerset; Bedford |
Pennsylvania Route 31
Pennsylvania Route 31 is a state highway in southwestern Pennsylvania, serving as a regional connector between communities in Westmoreland County, Fayette County, Somerset County, and Bedford County. The route links towns, boroughs, and rural townships while intersecting major corridors such as U.S. 40, U.S. 119, I-70, and U.S. 30. It serves both local traffic and through travelers accessing historic sites like Fallingwater and institutional centers including Pennsylvania State University campuses and medical facilities.
Pennsylvania Route 31 begins near West Newton at an interchange with I‑70 and proceeds southeast through Harrison Township and along corridors that parallel the Monongahela River valley toward Connellsville. In Connellsville, the route traverses commercial districts adjacent to U.S. 119 and connects to the Pennsylvania Turnpike access via local arterial roads. East of Connellsville the highway passes near the Fallingwater and Kentuck Knob historic properties, crossing into Somerset County through a series of townships that include Summit Township and Meyersdale, where it intersects U.S. 219. Continuing east, PA 31 climbs the Allegheny Plateau and approaches Bedford county lines, ultimately terminating at a junction with U.S. 30 near Bedford County communities. Along its length the route interfaces with rail corridors such as lines operated by Norfolk Southern Railway and industrial sites tied to the legacy of the coal industry and the steel industry.
The corridor that became PA 31 follows older 19th‑century roads used for stagecoach travel and freight movement between Pittsburgh and the Allegheny Mountains. The designation was assigned during statewide numbering initiatives contemporaneous with improvements to the Lincoln Highway and other early auto trails; these reforms involved the Pennsylvania Department of Transportation and national organizations influenced by routes such as U.S. 30 and U.S. 119. Over time sections were realigned to accommodate construction of I‑70 and the Pennsylvania Turnpike, and to bypass downtown centers in Uniontown and Connellsville. Infrastructure projects during the 20th century included bridge replacements funded by state programs and federal initiatives influenced by legislation modeled on works near New Deal‑era projects and later transportation funding acts. Historic bridges along the route have associations with builders who worked on projects for entities like the Works Progress Administration; some segments have preserved roadside architecture comparable to properties listed on the National Register of Historic Places in Pennsylvania.
PA 31 intersects multiple major corridors that serve regional and interstate traffic, including: - I‑70 near West Newton - U.S. 119 in Connellsville - U.S. 40 in the Laurel Highlands region near historic sites such as Fallingwater - U.S. 219 in Meyersdale - U.S. 30 near Bedford These intersections connect PA 31 to routes serving Pittsburgh, Harrisburg, Baltimore, and Washington, D.C. travel corridors and to regional destinations including Ohiopyle State Park, Laurel Ridge State Park, and cultural assets in Fayette County.
Several auxiliary alignments and former realignments have been associated with the PA 31 corridor. Historic bypasses and business routes served downtowns such as Connellsville, Uniontown, and Smock; some were redesignated or decommissioned following construction of limited‑access facilities like I‑70 and the Turnpike. Local governments and metropolitan planning organizations including the Allegheny County Department of Public Works and regional planning commissions have proposed truck routes and seasonal detours to manage heavy vehicle movements near industrial sites tied to entities like U.S. Steel and power plants in the region.
Traffic volumes on PA 31 vary from higher daily counts near Connells ville and interchanges with I‑70 and U.S. 119, to lower rural counts on the Allegheny Plateau between Somerset County townships. The corridor supports commuter flows to employment centers in Pittsburgh, freight movements connecting to Norfolk Southern Railway intermodal terminals, and tourist traffic accessing sites such as Fallingwater and the Flight 93 National Memorial. Seasonal variations reflect recreational travel to parks like Ohiopyle State Park and winter weather impacts associated with elevation changes near the Laurel Highlands. Safety studies by regional agencies reference crash data trends common to two‑lane rural arterial routes, with emphasis on intersection improvements adjacent to Pennsylvania Turnpike interchanges and school zones serving districts such as Consolidated School Districts in multiple counties.
Planned and proposed projects affecting PA 31 include pavement rehabilitation funded through the Pennsylvania Department of Transportation’s capital program, bridge replacements to meet standards promulgated by the Federal Highway Administration, and corridor safety enhancements coordinated with county governments and metropolitan planning organizations such as the Southwestern Pennsylvania Commission. Initiatives aim to improve connectivity to economic development sites, support heritage tourism tied to attractions like Fallingwater and the Kentuck Knob, and upgrade links to interstate routes including I‑70 and U.S. 30. Discussions have involved potential multimodal investments to improve access to rail facilities operated by Norfolk Southern Railway and regional transit providers, and grant applications under federal surface transportation programs to finance interchange modifications and shoulder widening to accommodate emergency responses in the Appalachian corridor.