Pennsylvania Route 31 (PA 31) is a
state highway
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, numbered or maintained by a sub-national state or province. A road numbered ...
located in
Western Pennsylvania
Western Pennsylvania is a region in the Commonwealth of Pennsylvania
Pennsylvania, officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the Unite ...
, paralleling
U.S. Route 30
U.S. Route 30 or U.S. Highway 30 (US 30) is an east–west main route of the United States Numbered Highway System, with the highway traveling across the Northern U.S. With a length of , it is the third-longest U.S. Highway, afte ...
(US 30) and the
Pennsylvania Turnpike
The Pennsylvania Turnpike, sometimes shortened to Penna Turnpike or PA Turnpike, is a controlled-access toll road which is operated by the Pennsylvania Turnpike Commission (PTC) in Pennsylvania. It runs for across the southern part of the st ...
for most of its length. The designation begins at
PA 136 near West Newton and ends at US 30 near Bedford.
Route description
Westmoreland and Fayette counties
PA 31's designation begins at
Pennsylvania Route 136 near West Newton.
It travels east, interchanging with Interstate 70.
After that interchange, PA 31 does not intersect any more
numbered roads until it interchanges with
U.S. Route 119 in the western part of Mount Pleasant. When PA 31 interchanges US 119, it turns from a two-lane surface road into first a four-lane road, and then into a city street as it goes through Mount Pleasant.
As PA 31 progresses through Mount Pleasant, it forms a
concurrency with
Pennsylvania Route 981.
After that, it intersects
Pennsylvania Route 819 before leaving the borough and entering the township.
The first intersection with a numbered road after entering the township is
Pennsylvania Route 982.
This is the only major intersection until it reaches Donegal. When it does reach Donegal, there is an entrance ramp to the
Pennsylvania Turnpike
The Pennsylvania Turnpike, sometimes shortened to Penna Turnpike or PA Turnpike, is a controlled-access toll road which is operated by the Pennsylvania Turnpike Commission (PTC) in Pennsylvania. It runs for across the southern part of the st ...
, and immediately following that is the western terminus of the concurrency with
Pennsylvania Route 711.
later, PA 31 intersects
Pennsylvania Route 381
Pennsylvania Route 381 (PA 381) is a state highway located in Fayette County, Pennsylvania, Fayette, and Westmoreland County, Pennsylvania, Westmoreland counties in Pennsylvania, United States. The southern terminus is the West Virginia state l ...
. This marks the eastern terminus of the concurrency with PA 711, and the western terminus of PA 381. It is also the northern terminus of the PA 381/711 concurrency as well.
Before leaving Donegal Township, PA 31 approaches the eastern terminus of the concurrency with PA 381. This is the last major intersection before PA 31 winds its way through rural Pennsylvania to Somerset.
Somerset County

Just after crossing the Westmoreland County/Somerset County line (the dividing line between the
Pittsburgh metropolitan area
Greater Pittsburgh is the metropolitan area surrounding the city of Pittsburgh in Western Pennsylvania, United States. The region includes Allegheny County, Pennsylvania, Allegheny County, Pittsburgh's urban core county and economic hub, and s ...
and the
Johnstown, Pennsylvania
Johnstown is the largest city in Cambria County, Pennsylvania, United States. The population was 18,411 as of the 2020 United States census, 2020 census. Located east of Pittsburgh, it is the principal city of the Metropolitan statistical area ...
metro area, PA 31 provides entrance to the
Hidden Valley Ski Resort area.

After winding past rural Westmoreland and Fayette Counties, PA 31 enters Somerset County and encounters the borough of Somerset. Immediately after entering Somerset, PA 31 intersects
Pennsylvania Route 281 and forms a concurrency on
one-way pair
A one-way pair, one-way couple, or couplet refers to that portion of a bi-directional traffic facilitysuch as a road, bus, streetcar, or light rail linewhere its opposing flows exist as two independent and roughly parallel facilities.
Descriptio ...
s.
While being concurrent, both highways intersect the southern terminus of
Pennsylvania Route 601.
Not a long while after, PA 31/281 end the concurrency, as PA 281 splits north, while PA 31 continues east.

Past the downtown area, PA 31 weaves through the
Pennsylvania Turnpike
The Pennsylvania Turnpike, sometimes shortened to Penna Turnpike or PA Turnpike, is a controlled-access toll road which is operated by the Pennsylvania Turnpike Commission (PTC) in Pennsylvania. It runs for across the southern part of the st ...
and passes over
U.S. Route 219.
PA 31 continues toward Roxbury, running along the border between
Stonycreek Township and
Brothersvalley Township. The intersection with
Pennsylvania Route 160 is the last intersection in Somerset County and the only one in Roxbury.
After this intersection, PA 31 generally parallels the Turnpike and winds through hilly terrain, passing through
Allegheny Township on its way east.
Bedford County
Entering Bedford County, there are no major intersections with any numbered roads until PA 31 enters Manns Choice. Instead, it winds through hilly terrain that parallels the Turnpike. As PA 31 nears Manns Choice, it intersects
Pennsylvania Route 96 and is concurrent for .
After separating, PA 31 continues for before terminating at
U.S. Route 30
U.S. Route 30 or U.S. Highway 30 (US 30) is an east–west main route of the United States Numbered Highway System, with the highway traveling across the Northern U.S. With a length of , it is the third-longest U.S. Highway, afte ...
.
History
The portion of the highway that runs through
Mount Pleasant borough is said to have evolved from a Native American path that predated European settlers. With the coming of European settlers, it became an important access road to the western wilderness and to more settled areas to the east.
As early as 1772, a road called Glades Road had originally led from Somerset to Bedford, which were the places of two
Underground Railroad
The Underground Railroad was an organized network of secret routes and safe houses used by freedom seekers to escape to the abolitionist Northern United States and Eastern Canada. Enslaved Africans and African Americans escaped from slavery ...
stations. The road would become PA 31 and would go through the towns of West Newton, Mount Pleasant,
Monongahela, and
Washington
Washington most commonly refers to:
* George Washington (1732–1799), the first president of the United States
* Washington (state), a state in the Pacific Northwest of the United States
* Washington, D.C., the capital of the United States
** A ...
that had also organized underground railroad stations.
In 1911, the Sproul Road Bill defined Legislative Route 181 for the segment between Washington and West Newton, LR 186 between West Newton and Somerset, LR 364 between Somerset and
Dividing Ridge, and LR 49 between Dividing Ridge and Bedford.
The PA 31 designation began appearing on road maps and signage in 1927.
At that time, the western terminus was at the West Virginia line at
West Virginia Route 27
West Virginia Route 27 is an east–west state highway located within the northern panhandle county of Brooke County, West Virginia, Brooke in West Virginia. The western terminus of the route is at West Virginia Route 2 in Wellsburg, West ...
. The east end back then was still at US 30, unchanged from today.
On its way eastward, PA 31 met the southern terminus of
PA 28 near
Avella
Avella is a town and ''comune'' in the province of Avellino, Campania, southern Italy. It is renowned for the cultivation of hazelnuts, whose specific name ''(Corylus avellana)'' derives precisely from this territory.
Etymology
Could be relat ...
, was
concurrent with
PA 18 and
US 19
U.S. Route 19 or U.S. Highway 19 (US 19) is a north–south United States Numbered Highway in the Eastern United States. Despite encroaching Interstate Highways, the route has remained a long-haul road, connecting the Gulf of Mex ...
, and traded paths with
US 40
U.S. Route 40 or U.S. Highway 40 (US 40), also known as the Main Street of America (a nickname shared with U.S. Route 66), is a major east–west United States Highway traveling across the United States from the Mountain States to the Mid- ...
in
Washington
Washington most commonly refers to:
* George Washington (1732–1799), the first president of the United States
* Washington (state), a state in the Pacific Northwest of the United States
* Washington, D.C., the capital of the United States
** A ...
.
In September 1964, the western terminus of PA 31 was truncated to its current location at the intersection of Mount Pleasant Road and Greensburg Pike in West Newton. Two segments of the decommissioned route were renumbered.
PA 136 was designated from the western terminus of PA 31 to US 40/PA 18 in Washington.
PA 844 (Jefferson Avenue) was designated from PA 18 (Henderson Avenue) to the PA/WV state line. This left a gap of 1.4 miles of the former PA 31 which ran concurrently with PA 18 (and very briefly with US 40) between the termini of the newly designated routes (PA 844 east, PA 136 west). As a result, this gap did not need renumbered or any additional designations. PA 31 was truncated in order to avoid intersecting I-70 at multiple locations; the state only wanted state routes to intersect an Interstate highway once to avoid motorist confusion.
[ ]
Major intersections
Attractions
Glades Pike Inn
The Glades Pike Inn is a notable inn situated on the Glades Pike section of PA 31 in
Somerset
Somerset ( , ), Archaism, archaically Somersetshire ( , , ) is a Ceremonial counties of England, ceremonial county in South West England. It is bordered by the Bristol Channel, Gloucestershire, and Bristol to the north, Wiltshire to the east ...
. Since 1842, the inn was a place for weary travelers to unhitch their horses for a good place to eat and sleep. The modern day visitors of the inn use it for different reasons of traveling. The inn is located in the
Laurel Mountains recreational area.
Glades Pike Winery
The Glades Pike Winery is situated on the section of PA 31 known as Glades Pike, between Somerset and Donegal. Established in 1994, the winery is the place where visitors are offered samples of the award-winning wine varieties.
Notes
# May be hard to see, as it is a JPEG map scan.
See also
*
*
References
External links
{{commons category, Pennsylvania Route 31
Pennsylvania Highways: PA 31
031
Transportation in Westmoreland County, Pennsylvania
Transportation in Fayette County, Pennsylvania
Transportation in Somerset County, Pennsylvania
Transportation in Bedford County, Pennsylvania