Pennsylvania Route 100
Encyclopedia
Pennsylvania Route 100 is a state highway
in the U.S. state
of Pennsylvania
that runs from U.S. Route 202
in West Chester, Pennsylvania
to Pennsylvania Route 309
in Pleasant Corners, Pennsylvania
.
The highway replaced Pennsylvania Route 62 in the 1930s, although most spur route
s of PA 62 still retain their numbers.
PA 100 begins as an expressway in West Goshen Township
north of West Chester
at an interchange with U.S. Route 202
. Only northbound lanes of US 202 have access to PA 100, and only PA 100 southbound has access to South US 202. In 2008, this section went under a $9.9 million resurfacing project to replace the badly deteriorated original concrete surface with asphalt. In West Whiteland Township, the expressway ends when PA 100 meets its old alignment that is called Pottstown Pike that was decommissioned in 2003. It then passes under U.S. 30/Exton Bypass at an interchange in the southern portion of Exton.
Just north of the US 30 interchange in the center of Exton
, PA 100 intersects U.S. 30 Business also known as Lincoln Highway
. In Uwchlan Township
, PA 100's next major intersection is with Pennsylvania Route 113
, connecting Downingtown
and Phoenixville
. Less than a mile north of PA 113, PA 100 intersects Interstate 76
the Pennsylvania Turnpike
at the Downingtown exit (312). In West Vincent Township
, PA 100 meets PA 401
in the village of Ludwigs Corner
.
It's designated north into South Coventry Township
meeting Pennsylvania Route 23
in the village of Bucktown. About a mile south of Pottstown
, PA 100 meets Pennsylvania Route 724
at an interchange. In North Coventry Township
, PA 100 meets U.S. Route 422
also known as the Pottstown Expressway. US 422 and PA 100 meet at a full Cloverleaf interchange
.
. Graphite Mine Road, when completed, was originally anticipated to be a new alignment to Route 100 through Eagle. In August 2009 the southern half of the road opened, finally completing the roadway through the area (the northern half had been completed and opened since June 2005). To the surprise of many in the area PA 100 has remained on its former alignment (Pottstown Pike) through the village center. Traveling Northbound on PA 100 past the Turnpike, the roadway's layout is designed to make Graphite Mine Road appear as the default straight ahead road. While signage points drivers into a left turn lane to continue on PA-100/Pottstown Pike North at the newly constructed intersection. As for the northern Pottstown Pike/Graphite Mine Rd intersection on the opposite side of town, travelers on Route 100 South find PA-100/Pottstown Pike as the straight ahead route still, although there is a text sign just before the intersection that reads, "Graphite Mine Road to PA-100 South: Keep Left." As of June 2010 it is still unclear whether PENNDOT plans to keep 100 on its current alignment or move it to the new roadway.
After crossing the Schuylkill River
, PA 100 enters Montgomery
and the town of Pottstown
. At the southern tip of Pottstown, PA 100 intersects the southern terminus of Pennsylvania Route 663
. North of Pottstown, PA 100 is multilaned and divided road with some exits but not at limited-access level. One of those exits is in Douglass Township
when PA 100 meets Pennsylvania Route 73
at a Diamond interchange
.
and Bally
. PA 100 becomes Main Street in Bally. In Hereford Township
Just north of Bally, PA 100 begins a long concurrency with Pennsylvania Route 29
into Lehigh County
.
. As PA 100/PA 29 enter Lehigh County, the road is known as Chestnut Street. In Upper Milford Township marks the northern terminus of the concurrency with Pennsylvania Route 29
. As of July 1, 2011, PennDOT created a truck route to bypass the sharp curves on PA 100. The truck route begins at the intersection with PA 29 and runs concurrent with it. It then turns to the west along Buckeye Road before rejoining PA 100 in Macungie. Northwest of the concurrency with PA 29, PA 100 is called Kings Highway. PA 100 enters Macungie
as Main Street. A mile south of Trexlertown, PA 100 becomes a newly formed 4 lane divided highway around Trexlertown called Trexlertown Bypass. The Highway was completed on 2005 and the US 222 segment was completed in 2007.
In Upper Macungie Township, PA 100 intersects U.S. Route 222 at an interchange. US 222 merges with PA 100 on the eastern segment of the highway. North of Trexlertown, PA 100 passes by an area with a lot of factories and companies like Nestle and Shop Rite. in Fogelsville
, PA 100 intersect Interstate 78 and U.S. Route 22
at exits 49A-B north of the industrial area. North of the I-78 interchange, PA 100 meets Tilghman Street/Main Street the former segment of US 22. For more than 10 miles (16.1 km) north of the I-78 interchange, PA 100 is a two-laned local road running through many farms and rivers. In Heidelberg Township
, PA 100 terminates (ends) at a "T" intersection with Pennsylvania Route 309
.
of PA 162
, PA 262, PA 562
, and PA 662
still remained.
Before 2003, south of Exton, PA 100 used to continue south along Pottstown Pike towards West Chester; the connector expressway (to US 202) split from it just south of Exton. Once PA 100 entered West Chester it became High Street, the main north–south artery route through the town, and it picked up a concurrency with Business U.S. 322
. Several blocks north of West Chester University
it turned right onto Price Street, leaving the US 322 Business concurrency picking up the beginning of PA 52. At the Brandywine Picnic Park in Pocopson it forked to the left onto Creek Road, leaving the PA 52 concurrency. It continued south winding through southern Chester and Delaware Counties following the Brandywine Creek into Delaware
, with a very short wrong-way concurrency with U.S. 1
/Baltimore Pike, then becoming Delaware Route 100
. The alignment was changed due to local complaints about long-distance and freight traffic mistakenly traveling through West Chester via High Street to get to US 202 towards Delaware on the south side of West Chester, instead of the more appropriate path of travel along the spur to US 202 that matches the current alignment of PA 100. The old alignment of PA 100 south of Exton to the Delaware border is still driveable, although there was a slight traffic-pattern change northbound just before US 1 so that northbound traffic would have a traffic light, not a stop sign (this eliminates the northbound wrong-way concurrency with US 1 southbound).
In 2007, The Jaindl Highway (Trexlertown Bypass) opened and rerouted Route 100 onto the western loop instead of continuing on Trexlertown Road through Trexlertown.
State highway
State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...
in the U.S. state
U.S. state
A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...
of Pennsylvania
Pennsylvania
The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...
that runs from U.S. Route 202
U.S. Route 202
U.S. Route 202 is a highway stretching from Delaware to Maine, also passing through the states of Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, and New Hampshire....
in West Chester, Pennsylvania
West Chester, Pennsylvania
The Borough of West Chester is the county seat of Chester County, Pennsylvania, United States. The population was 18,461 at the 2010 census.Valley Forge, the Brandywine Battlefield, Longwood Gardens, Marsh Creek State Park, and other historical attractions are near West Chester...
to Pennsylvania Route 309
Pennsylvania Route 309
Pennsylvania Route 309 is a major highway which runs for 134 miles through Pennsylvania in the United States. It connects Philadelphia and its northern suburbs to Allentown, Hazleton, and Wilkes-Barre. A limited-access highway portion of PA 309 in the Wilkes-Barre area is known as the North...
in Pleasant Corners, Pennsylvania
Pleasant Corners, Pennsylvania
Pleasant Corners is an unincorporated community located in Lehigh County, Pennsylvania at the intersections of Pennsylvania Route 100 and Pennsylvania Route 309, in the United States. It is part of the Lehigh Valley region of the state....
.
The highway replaced Pennsylvania Route 62 in the 1930s, although most spur route
Spur route
A spur route is a short road forming a branch from a longer, more important route . A bypass or beltway is never considered a true spur route as it typically reconnects with the major road...
s of PA 62 still retain their numbers.
Chester County
West Goshen Township, Pennsylvania
West Goshen Township is a township in Chester County, Pennsylvania, United States. The population was 21,866 at the 2010 census. In 2009, Money Magazine voted West Goshen as the 11th best small town in America....
north of West Chester
West Chester, Pennsylvania
The Borough of West Chester is the county seat of Chester County, Pennsylvania, United States. The population was 18,461 at the 2010 census.Valley Forge, the Brandywine Battlefield, Longwood Gardens, Marsh Creek State Park, and other historical attractions are near West Chester...
at an interchange with U.S. Route 202
U.S. Route 202
U.S. Route 202 is a highway stretching from Delaware to Maine, also passing through the states of Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, and New Hampshire....
. Only northbound lanes of US 202 have access to PA 100, and only PA 100 southbound has access to South US 202. In 2008, this section went under a $9.9 million resurfacing project to replace the badly deteriorated original concrete surface with asphalt. In West Whiteland Township, the expressway ends when PA 100 meets its old alignment that is called Pottstown Pike that was decommissioned in 2003. It then passes under U.S. 30/Exton Bypass at an interchange in the southern portion of Exton.
Just north of the US 30 interchange in the center of Exton
Exton, Pennsylvania
Exton is a census-designated place in West Whiteland Township, Chester County, Pennsylvania, United States. Its population was 4,842 at the 2010 census. The Exton Square Mall is located within Exton along with several other shopping centers, making Exton the major shopping district in Chester...
, PA 100 intersects U.S. 30 Business also known as Lincoln Highway
Lincoln Highway
The Lincoln Highway was the first road across the United States of America.Conceived and promoted by entrepreneur Carl G. Fisher, the Lincoln Highway spanned coast-to-coast from Times Square in New York City to Lincoln Park in San Francisco, originally through 13 states: New York, New Jersey,...
. In Uwchlan Township
Uwchlan Township, Pennsylvania
Uwchlan Township is a township in Chester County, Pennsylvania, United States. The population was 18,088 at the 2010 census.-Geography:Uwchlan Township is located at at an elevation of . According to the United States Census Bureau, the township has a total area of , all of it land.-Adjacent...
, PA 100's next major intersection is with Pennsylvania Route 113
Pennsylvania Route 113
Pennsylvania Route 113 is a long state route in eastern Pennsylvania. The southern terminus of the route is at U.S. Route 30 Business in Downingtown. Its northern terminus is at Pennsylvania Route 611 in Tinicum Township...
, connecting Downingtown
Downingtown, Pennsylvania
Downingtown is a borough in Chester County, Pennsylvania, west of Philadelphia. As of the 2010 census it had a population of 7,891. Downingtown was settled by English and European colonists in the early 18th century and has a number of historic buildings and structures.-History:The town was...
and Phoenixville
Phoenixville, Pennsylvania
Phoenixville is a borough in Chester County, Pennsylvania, United States, northwest of Philadelphia, at the junction of French Creek with the Schuylkill River. The population is 16,440 as of the 2010 Census.- History :...
. Less than a mile north of PA 113, PA 100 intersects Interstate 76
Interstate 76 (east)
Interstate 76 is an Interstate Highway in the United States, running 435 miles from an interchange with Interstate 71 west of Akron, Ohio, east to Interstate 295 near Camden, New Jersey....
the Pennsylvania Turnpike
Pennsylvania Turnpike
The Pennsylvania Turnpike is a toll highway system operated by the Pennsylvania Turnpike Commission in the Commonwealth of Pennsylvania, United States. The three sections of the turnpike system total . The main section extends from Ohio to New Jersey and is long...
at the Downingtown exit (312). In West Vincent Township
West Vincent Township, Pennsylvania
West Vincent Township is a township in Chester County, Pennsylvania, United States. The population was 4,567 at the 2010 census.-Geography:According to the United States Census Bureau, the township has a total area of , of which , or 0.22%, is water...
, PA 100 meets PA 401
Pennsylvania Route 401
Pennsylvania Route 401 is a short east–west state route in Berks and Chester counties, located in southeast Pennsylvania. The western terminus is at Pennsylvania Route 23 in Caernarvon Township, across the county line from Elverson. The eastern terminus is at U.S...
in the village of Ludwigs Corner
Ludwigs Corner, Pennsylvania
Ludgwigs Corner, Pennsylvania is a town located in West Vincent Township, four miles north of Eagle, PA. Upper Uwchlan Township, Chester County, Pennsylvania.-Geography:...
.
It's designated north into South Coventry Township
South Coventry Township, Pennsylvania
South Coventry Township is a township in Chester County, Pennsylvania, United States. The population was 2,604 at the 2010 census.-Geography:According to the United States Census Bureau, the township has a total area of , all of it land....
meeting Pennsylvania Route 23
Pennsylvania Route 23
Pennsylvania Route 23 is a state highway in southeastern Pennsylvania. The route begins at Pennsylvania Route 441 in Marietta and heads east to U.S. Route 1 in Philadelphia.-Marietta to Valley Forge:...
in the village of Bucktown. About a mile south of Pottstown
Pottstown, Pennsylvania
Pottstown is a borough in Montgomery County, Pennsylvania, United States northwest of Philadelphia and southeast of Reading, on the Schuylkill River. Pottstown was laid out in 1752–53 and named Pottsgrove in honor of its founder, John Potts. The old name was abandoned at the time of the...
, PA 100 meets Pennsylvania Route 724
Pennsylvania Route 724
Pennsylvania Route 724 is a road spanning from Sinking Spring, Pennsylvania to Phoenixville, Pennsylvania. 724 travels through the counties of Berks and Chester...
at an interchange. In North Coventry Township
North Coventry Township, Pennsylvania
North Coventry Township is a township in Chester County, Pennsylvania, United States. The population was 7,866 at the 2010 census.-Geography:...
, PA 100 meets U.S. Route 422
U.S. Route 422
U.S. Route 422 is a long spur route of US 22 split into two segments in the U.S. states of Ohio and Pennsylvania. The western spur begins in downtown Cleveland, Ohio, and ends at Ebensburg, Pennsylvania...
also known as the Pottstown Expressway. US 422 and PA 100 meet at a full Cloverleaf interchange
Cloverleaf interchange
A cloverleaf interchange is a two-level interchange in which left turns, reverse direction in left-driving regions, are handled by ramp roads...
.
Eagle Bypass
The Eagle Bypass is an alternative to current Pennsylvania Route 100 through the area near Eagle, PAEagle, Pennsylvania
Eagle is an unincorporated community in Upper Uwchlan Township, Chester County, Pennsylvania, United States. Located at , the center of the village is the intersection of Pottstown Pike and Little Conestoga Road, where the historic Eagle Tavern is located...
. Graphite Mine Road, when completed, was originally anticipated to be a new alignment to Route 100 through Eagle. In August 2009 the southern half of the road opened, finally completing the roadway through the area (the northern half had been completed and opened since June 2005). To the surprise of many in the area PA 100 has remained on its former alignment (Pottstown Pike) through the village center. Traveling Northbound on PA 100 past the Turnpike, the roadway's layout is designed to make Graphite Mine Road appear as the default straight ahead road. While signage points drivers into a left turn lane to continue on PA-100/Pottstown Pike North at the newly constructed intersection. As for the northern Pottstown Pike/Graphite Mine Rd intersection on the opposite side of town, travelers on Route 100 South find PA-100/Pottstown Pike as the straight ahead route still, although there is a text sign just before the intersection that reads, "Graphite Mine Road to PA-100 South: Keep Left." As of June 2010 it is still unclear whether PENNDOT plans to keep 100 on its current alignment or move it to the new roadway.
Montgomery County
Schuylkill River
The Schuylkill River is a river in Pennsylvania. It is a designated Pennsylvania Scenic River.The river is about long. Its watershed of about lies entirely within the state of Pennsylvania. The source of its eastern branch is in the Appalachian Mountains at Tuscarora Springs, near Tamaqua in...
, PA 100 enters Montgomery
Montgomery County, Pennsylvania
Montgomery County is a county located in the U.S. state of Pennsylvania, in the United States. As of 2010, the population was 799,874, making it the third most populous county in Pennsylvania . The county seat is Norristown.The county was created on September 10, 1784, out of land originally part...
and the town of Pottstown
Pottstown, Pennsylvania
Pottstown is a borough in Montgomery County, Pennsylvania, United States northwest of Philadelphia and southeast of Reading, on the Schuylkill River. Pottstown was laid out in 1752–53 and named Pottsgrove in honor of its founder, John Potts. The old name was abandoned at the time of the...
. At the southern tip of Pottstown, PA 100 intersects the southern terminus of Pennsylvania Route 663
Pennsylvania Route 663
Pennsylvania Route 663 is a long state highway in Bucks and Montgomery counties in southeast Pennsylvania. Its northern terminus is at PA 309 and PA 313 in Quakertown, where it continues eastward as PA 313, and its southern terminus is at PA 100 in Pottstown. Along the way, PA 663 also passes...
. North of Pottstown, PA 100 is multilaned and divided road with some exits but not at limited-access level. One of those exits is in Douglass Township
Douglass Township, Berks County, Pennsylvania
Douglass Township is a township in Berks County, Pennsylvania, United States. The population was 3,327 at the 2000 census.-Geography:According to the United States Census Bureau, the township has a total area of , of which, of it is land and of it is water.Adjacent townships*Colebrookdale...
when PA 100 meets Pennsylvania Route 73
Pennsylvania Route 73
Pennsylvania Route 73 is a 62.51 miles long east–west state highway in southeastern Pennsylvania. It runs from Pennsylvania Route 61 in Leesport to the New Jersey state line on the Tacony-Palmyra Bridge in Philadelphia, where it continues as New Jersey Route 73.Predating the Interstate...
at a Diamond interchange
Diamond interchange
A diamond interchange is a common type of road junction, used where a freeway crosses a minor road. The freeway itself is grade-separated from the minor road, one crossing the other over a bridge...
.
Berks County
North of the PA 73 interchange, PA 100 returns to a two laned local road in Berks County. In Berks County, PA 100 passes through the towns of BechtelsvilleBechtelsville, Pennsylvania
Bechtelsville is a borough in Berks County, Pennsylvania, United States. Its population was 931 at the 2000 census. Its population was 942 in the 2010 Census.-Geography:Bechtelsville is located at ....
and Bally
Bally, Pennsylvania
Bally is a borough in Berks County, Pennsylvania, United States. The population was 1,062 at the 2000 census, but a 2005 census estimate put the population at 1,102 residents.-History:...
. PA 100 becomes Main Street in Bally. In Hereford Township
Hereford Township, Pennsylvania
Hereford Township is a township in Berks County, Pennsylvania, United States, of which it is the easternmost municipality. Its population was 3,174 at the 2000 census. It is in Upper Perkiomen School District.-Geography:...
Just north of Bally, PA 100 begins a long concurrency with Pennsylvania Route 29
Pennsylvania Route 29
Pennsylvania Route 29 is a 118 mile long north–south state highway that runs through most of eastern Pennsylvania. The route currently exists in two segments, a southern segment and a northern segment. The southernmost terminus of the designation is at U.S. Route 30 in Malvern...
into Lehigh County
Lehigh County, Pennsylvania
-Climate:Most of the county's climate is considered to fall in the humid continental climate zone. Summers are typically hot and muggy, fall and spring are generally mild, and winter is cold. Precipitation is almost uniformly distributed throughout the year....
.
Lehigh County
PA 100 enters Lehigh County on a concurrency with Pennsylvania Route 29Pennsylvania Route 29
Pennsylvania Route 29 is a 118 mile long north–south state highway that runs through most of eastern Pennsylvania. The route currently exists in two segments, a southern segment and a northern segment. The southernmost terminus of the designation is at U.S. Route 30 in Malvern...
. As PA 100/PA 29 enter Lehigh County, the road is known as Chestnut Street. In Upper Milford Township marks the northern terminus of the concurrency with Pennsylvania Route 29
Pennsylvania Route 29
Pennsylvania Route 29 is a 118 mile long north–south state highway that runs through most of eastern Pennsylvania. The route currently exists in two segments, a southern segment and a northern segment. The southernmost terminus of the designation is at U.S. Route 30 in Malvern...
. As of July 1, 2011, PennDOT created a truck route to bypass the sharp curves on PA 100. The truck route begins at the intersection with PA 29 and runs concurrent with it. It then turns to the west along Buckeye Road before rejoining PA 100 in Macungie. Northwest of the concurrency with PA 29, PA 100 is called Kings Highway. PA 100 enters Macungie
Macungie, Pennsylvania
Macungie is a borough in Lehigh County, Pennsylvania, in the United States. It is the second oldest borough in the county and a suburb of Allentown, Pennsylvania in the Lehigh Valley region of the state.-History:...
as Main Street. A mile south of Trexlertown, PA 100 becomes a newly formed 4 lane divided highway around Trexlertown called Trexlertown Bypass. The Highway was completed on 2005 and the US 222 segment was completed in 2007.
In Upper Macungie Township, PA 100 intersects U.S. Route 222 at an interchange. US 222 merges with PA 100 on the eastern segment of the highway. North of Trexlertown, PA 100 passes by an area with a lot of factories and companies like Nestle and Shop Rite. in Fogelsville
Fogelsville, Pennsylvania
Fogelsville is a village in Lehigh County, Pennsylvania, in the United States. It is a suburb of Allentown, in Upper Macungie Township, in the Lehigh Valley region of the state....
, PA 100 intersect Interstate 78 and U.S. Route 22
U.S. Route 22
U.S. Route 22 is a west–east route and is one of the original United States highways of 1926, running from Cincinnati, Ohio, at US 27, US 42, US 127, and US 52 to Newark, New Jersey, at U.S. Route 1/9 near the Newark Liberty International Airport.US 22 also carries the names of the William...
at exits 49A-B north of the industrial area. North of the I-78 interchange, PA 100 meets Tilghman Street/Main Street the former segment of US 22. For more than 10 miles (16.1 km) north of the I-78 interchange, PA 100 is a two-laned local road running through many farms and rivers. In Heidelberg Township
Heidelberg Township, Lehigh County, Pennsylvania
Heidelberg Township is a township in Lehigh County, Pennsylvania, in the United States. It is a suburb of Allentown, Pennsylvania, in the Lehigh Valley region of the state.The population of Heidelberg Township was 3,279 at the 2000 census.-Geography:...
, PA 100 terminates (ends) at a "T" intersection with Pennsylvania Route 309
Pennsylvania Route 309
Pennsylvania Route 309 is a major highway which runs for 134 miles through Pennsylvania in the United States. It connects Philadelphia and its northern suburbs to Allentown, Hazleton, and Wilkes-Barre. A limited-access highway portion of PA 309 in the Wilkes-Barre area is known as the North...
.
History
PA 100 was originally signed as Pennsylvania Route 62, for its entire length. By 1940, PA 100 was commissioned although the PA 62 spursSpur route
A spur route is a short road forming a branch from a longer, more important route . A bypass or beltway is never considered a true spur route as it typically reconnects with the major road...
of PA 162
Pennsylvania Route 162
Pennsylvania Route 162 is a long state highway in southeast Pennsylvania. The western terminus of the route is at the Pennsylvania Route 82 / Pennsylvania Route 842 concurrency in Unionville, Chester County. The eastern terminus is at U.S...
, PA 262, PA 562
Pennsylvania Route 562
Pennsylvania Route 562 is a state highway in Berks County, Pennsylvania. The route runs from U.S. Route 422 Business in St. Lawrence east to Pennsylvania Route 73 in Boyertown.-Route description:...
, and PA 662
Pennsylvania Route 662
Pennsylvania Route 662 is a long road located in eastern Pennsylvania. Its northern terminus is at Pennsylvania Route 61 in Shoemakerville and its southern terminus is at U.S. Route 422 in Douglassville. The entire route is in Berks County...
still remained.
Before 2003, south of Exton, PA 100 used to continue south along Pottstown Pike towards West Chester; the connector expressway (to US 202) split from it just south of Exton. Once PA 100 entered West Chester it became High Street, the main north–south artery route through the town, and it picked up a concurrency with Business U.S. 322
U.S. Route 322 Business (West Chester, Pennsylvania)
U.S. Route 322 Business is a business route of U.S. Route 322 in the borough of West Chester in Chester County, Pennsylvania. The route runs along the former alignment of U.S. Route 322 before it was rerouted to bypass West Chester to the north and east on the West Chester Bypass.-Route...
. Several blocks north of West Chester University
West Chester University of Pennsylvania
West Chester University of Pennsylvania is a public university located in West Chester, Pennsylvania, about miles west of Philadelphia. It is one of the 14 state universities of the Pennsylvania State System of Higher Education . West Chester was ranked 69th in the Master's Universities ...
it turned right onto Price Street, leaving the US 322 Business concurrency picking up the beginning of PA 52. At the Brandywine Picnic Park in Pocopson it forked to the left onto Creek Road, leaving the PA 52 concurrency. It continued south winding through southern Chester and Delaware Counties following the Brandywine Creek into Delaware
Delaware
Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...
, with a very short wrong-way concurrency with U.S. 1
U.S. Route 1 in Pennsylvania
U.S. Route 1 is a major north–south U.S. Highway, extending from the Florida Keys in the south to the Canadian border in the north. In the U.S. state of Pennsylvania, US 1 runs for from the Maryland state line near Oxford to the New Jersey state line near Trenton.-Maryland to Interstate...
/Baltimore Pike, then becoming Delaware Route 100
Delaware Route 100
Delaware Route 100 is a state highway in New Castle County, Delaware. The route runs from Delaware Route 4 near Elsmere to the Pennsylvania border near Montchanin, where it continues into Pennsylvania as Creek Road...
. The alignment was changed due to local complaints about long-distance and freight traffic mistakenly traveling through West Chester via High Street to get to US 202 towards Delaware on the south side of West Chester, instead of the more appropriate path of travel along the spur to US 202 that matches the current alignment of PA 100. The old alignment of PA 100 south of Exton to the Delaware border is still driveable, although there was a slight traffic-pattern change northbound just before US 1 so that northbound traffic would have a traffic light, not a stop sign (this eliminates the northbound wrong-way concurrency with US 1 southbound).
In 2007, The Jaindl Highway (Trexlertown Bypass) opened and rerouted Route 100 onto the western loop instead of continuing on Trexlertown Road through Trexlertown.