U.S. Route 422 (US 422) is a 271-mile-long (436 km)spur route ofUS 22 split into two segments in theU.S. states ofOhio andPennsylvania. The western segment of US 422 runs from downtownCleveland, Ohio, east toEbensburg, Pennsylvania. The eastern segment, located entirely within Pennsylvania, runs fromHershey east toKing of Prussia, nearPhiladelphia.US 422 Business (US 422 Bus.) serves as abusiness route into each of four towns along the way.
Indowntown Cleveland, the western terminus of the western segment of US 422 is atUS 6,US 20,US 42, andState Route 3 (SR 3) in Cleveland'sPublic Square, while the eastern terminus of the western segment is at an interchange withUS 219 near Ebensburg. In Hershey, the eastern segment of US 422 begins at an interchange with US 322 andPennsylvania Route 39 (PA 39), while the eastern terminus of the eastern segment is at an interchange withUS 202 andI-76 near King of Prussia. US 422 is named theBenjamin Franklin Highway in Pennsylvania in honor ofBenjamin Franklin.
The segmented nature of US 422 violatesAmerican Association of State Highway and Transportation Officials (AASHTO) numbering conventions, representing the only gap in a U.S. route not involving theCanada–United States border orYellowstone National Park. At the creation of the U.S. Highway system, AASHTO proposed the present western segment as the full length of US 422, while Pennsylvania wanted it to stretch across the state as part of a proposed Philadelphia–Omaha "Ben Franklin Highway" – including the Philadelphia–Reading road, which AASHTO had proposed to be a part ofUS 120. AASHTO questioned this request and noted that it would not renumber the longer US 22 from Reading to Ebensburg to create a continuous route; Pennsylvania assented to the two disconnected segments, and they were approved.[4]
The western section of US 422 begins atUS 6 andUS 20 at the center ofCleveland'sPublic Square in the downtown district. US 422 andSR 14, which shares its western terminus with that of US 422, form aconcurrency as the roadway heads south from the square. Less than a mile from the Public Square, US 422 and SR 14 intersect the ClevelandInnerbelt, the confluence ofInterstate 90 (I-90) and the northern termini ofI-71 andI-77. US 422 and SR 14 split at the interchange as SR 14 turns south to joinSR 43.SR 8 begins at the eastern terminus of the US 422/SR 14 overlap, forming a concurrency with US 422 along Woodland Avenue.[5][6]
US 422 runs easterly along Woodland Avenue and Kinsman Road, through the Kinsman neighborhood. As it crosses Cleveland's city limits just west of Lee Road inShaker Heights, the street name changes to Chagrin Boulevard, named for theChagrin River and Chagrin Falls[citation needed] (the eastern terminus of the boulevard) in Cleveland's eastern suburbs. Today, US 422 in Shaker Heights andBeachwood, where it now merges with I-271, is almost a linearedge city, with millions of square feet in office space centered on this corridor. It is one of the busiest streets inCuyahoga County andGreater Cleveland.[5][6] It serves as the primary commercial district for the wealthiest pocket of communities inNortheast Ohio.[citation needed]

At Northfield Road, SR 8 turns to the south, leaving US 422 to continue east along Chagrin Boulevard. Two miles east of SR 8 in Beachwood, US 422 intersectsSR 87 andSR 175, running concurrent with the former for two blocks toI-271 exit 29. Here, US 422 departs SR 87 and Chagrin Boulevard at the southbound ramp to I-271 and joins the expressway southward for 2.5 miles (4.0 km). At Exit 27, US 422 splits from I-271 and proceeds through the easternsuburbs of Cleveland as alimited-access highway, exitingCuyahoga County and enteringGeauga County.[5][6]
InAuburn Township, US 422 returns to grade-level upon crossing theLaDue Reservoir. The route continues to the southeast, cutting through northeastPortage County and then enteringTrumbull County, where US 422 runs through the center ofWarren andGirard. The section from downtown Warren toSR 46 is known as "The Strip"[citation needed] and is lined with shopping centers, fast-food restaurants and other retail establishments, including theEastwood Mall.[5][6] In the 1960s and 1970s, nightclubs along The Strip attracted top-name entertainers.[citation needed]
Farther southeast, US 422 entersYoungstown andMahoning County before entering Pennsylvania.[5][6]

US 422 enters Pennsylvania eight miles (13 km) northwest ofNew Castle. Three miles northwest of New Castle the route spurs off to bypass New Castle running along withI-376. I-376 spurs off and becomes atoll road, while US 422 continues onward to where it becomes a two-lane road with a center lane three miles southwest of New Castle. The route continues to the east where it meets withUS 19 and adjacentI-79. The road becomes an expressway again after its intersection with I-79 throughMoraine State Park. The expressway ends just north ofProspect by the Big Butler Fairgrounds. It proceeds further for four miles to where it becomes an expressway bypassingButler, and ending inEast Butler. It continues on for fifteen miles, becoming an expressway again to bypassKittanning, where it meets with the Allegheny Valley Expressway (PA 28) at the northern terminus of that expressway. At this point, PA 28 joins US 422 in a concurrency. US 422/PA 28 crosses over theAllegheny River andPA 66 joins US 422 and PA 28 on the expressway. At the east end of the expressway, PA 28/PA 66 splits to the north and US 422 becomes a two-lane highway with a center lane. It continues in this way for eighteen miles to where it bypassesIndiana, where it junctions withUS 119. The expressway continues for eight miles to where the expressway ends north ofYellow Creek State Park, becoming a two-lane highway. It continues like this for sixteen miles, until just before its terminus atUS 219 nearEbensburg.[5][7]

The eastern section of US 422 begins at apartial cloverleaf interchange withUS 322 and the eastern terminus ofPA 39 east of the borough ofHummelstown inDerry Township,Dauphin County, heading northeast as a four-lanefreeway that soon ends and becomes an at-gradedivided highway called WestChocolate Avenue. The road passes commercial development along with some farm fields and residential development as it heads into the community ofHershey. The route heads into a mix of homes and businesses and turns east-northeast, where it narrows to a two-lane undivided road. At this point, West Chocolate Avenue becomes lined withstreet lamps that are shaped likeHershey's Kisses. US 422 continues along West Chocolate Avenue and comes to an intersection withPA 743 at Cocoa Avenue in the center of Hershey. At this point, the route becomes East Chocolate Avenue, a three-lane divided with two eastbound lanes and one westbound lane that passes southeast of the site of the originalHershey Chocolate factory. The road becomes undivided, still with two eastbound lanes and one westbound lane, and passes near a few residences and businesses as it heads between theHershey Country Club to the north and Spring Creek Golf Course to the south, narrowing to two lanes. US 422 runs past more residential and commercial development, leaving Hershey and heading through the community ofPalmdale.[8][9]
US 422 enters the borough ofPalmyra inLebanon County and becomes West Main Street, running past homes and a few businesses. The route heads into the downtown area and the name changes to East Main Street at the Railroad Street intersection. The road runs past residences before it passes through commercial areas and comes to an intersection with the northern terminus ofPA 117. US 422 gains acenter left-turn lane and continues past businesses, leaving Palmyra forNorth Londonderry Township and becoming Benjamin Franklin Parkway. The route bends east and passes between businesses to the north and residential development to the south before it heads into farmland and crosses Killinger Creek, where it becomes the border betweenNorth Annville Township to the north andSouth Annville Township to the south as West Main Street. The road heads through agricultural areas with some woods, homes, and businesses, crossing theQuittapahilla Creek intoAnnville Township. At this point, US 422 heads east as a two-lane road that is lined with homes. In the commercial center ofAnnville, the route crossesPA 934 and becomes East Main Street, heading south of theLebanon Valley College campus. The road continues east past residential areas with a few businesses, gaining a center left-turn lane. US 422 heads into the borough ofCleona and becomes West Penn Avenue, heading past homes and commercial establishments. The route becomes East Penn Avenue at the Center Street intersection and runs through more developed areas, becoming the border between Cleona to the north andNorth Cornwall Township to the south. The road becomes the boundary betweenNorth Lebanon Township to the north and North Cornwall Township to the south and the name changes to Cumberland Street. US 422 heads east past businesses and passes to the south of theLebanon Valley Mall. The route runs along the border betweenWest Lebanon Township to the north and North Cornwall Township to the south as it continues through commercial areas with a few homes.[8][10]

US 422 enters the city ofLebanon at the 16th Street intersection, where it becomes a four-lane undivided road that passes commercial development and encounters an abandoned railroad line at the north end of theLebanon Valley Rail Trail. At 12th Street, the route crosses Quittapahilla Creek and splits into aone-way pair following Cumberland Street westbound and Walnut Street eastbound, with each street carrying two lanes of traffic. US 422 continues east past urbanrowhouses along with a few businesses, intersecting the southbound direction ofPA 72 at 10th Street and the northbound direction of PA 72 at 9th Street. The westbound direction heads through the downtown area of Lebanon, passing south of theHarrisburg Area Community College Lebanon Campus, while the eastbound direction heads through residential areas to the south of downtown. Farther east, US 422 passes urban areas of homes and businesses in the eastern part of Lebanon, with the eastbound direction passing north of WellSpan Good Samaritan Hospital. On the eastern border of Lebanon, the route comes to an intersection with the northern terminus ofPA 897. At this, westbound US 422 becomes the border between Lebanon to the north andSouth Lebanon Township to the south, briefly becoming a three-lane divided highway with two westbound lanes and one eastbound lane between PA 897 and North 5th Avenue before becoming a one-way road again, while eastbound US 422 fully enters South Lebanon Township, heading past residential areas in the community ofHebron. Eastbound US 422 turns north and passes businesses, crossing Quittapahilla Creek and rejoining westbound US 422 at East Cumberland Street. At this point, US 422 heads northeast as four-lane undivided East Cumberland Street past businesses, passing through a corner of Lebanon before entering North Lebanon Township and coming to a bridge overNorfolk Southern'sHarrisburg Line as it passes north of the community ofAvon. The route becomes a three-lane road with a center left-turn lane and runs along the border between North Lebanon Township to the northwest and South Lebanon Township to the southeast, heading through residential areas in the community of Avon Heights. The road heads into a mix of farmland and residential and commercial development. US 422 entersJackson Township and becomes West Lincoln Avenue, crossing theTulpehocken Creek and continuing through agricultural areas with some homes and businesses. The route heads into business areas and enters the borough ofMyerstown, where it reaches an intersection with the southern terminus ofPA 645. The road becomes a four-lane divided highway and crossesPA 501 before becoming East Lincoln Avenue at the Railroad Street intersection. US 422 leaves Myerstown for Jackson Township again and becomes a three-lane road with a center turn lane, heading east through farmland with some commercial development. The road intersects Wintersville Road/Millardsville Road, where it briefly become a divided highway before regaining a center left-turn lane.[8][10]
US 422 crosses intoMarion Township inBerks County and becomes Conrad Weiser Parkway, passing through farm fields with some residences and businesses. The route runs past homes and businesses in the community ofStouchsburg before it runs through more agricultural areas with some development, bending to the east-southeast. The road becomes three lanes with two westbound lanes and one eastbound lane, crossing the Tulpehocken Creek into the borough ofWomelsdorf. Here, US 422 turns into a four-lane divided highway and passes businesses as it comes to an intersection withPA 419. The route continues southeast near residential areas before it leaves Womelsdorf forHeidelberg Township and passes to the north of theConrad Weiser Homestead. US 422 heads east-southeast as West Penn Avenue, a three-lane road with a center turn lane that heads through rural areas with residential and commercial development. The road runs a short distance to the north of Norfolk Southern's Harrisburg Line before it enters the borough ofRobesonia. Here, the route runs along two-lane West Penn Avenue and is lined with homes and a few businesses. US 422 becomes East Penn Avenue at the Robeson Street intersection and passes more development. The road heads back into Heidelberg Township and gains a center left-turn lane, heading southeast past commercial development and to the south ofConrad Weiser High School. The route passes through a corner ofLower Heidelberg Township and becomes West Penn Avenue, soon forming the boundary between Lower Heidelberg Township to the northeast andSouth Heidelberg Township to the southwest. US 422 passes through farmland with some homes and businesses before it enters the borough ofWernersville. Here, the route becomes two-lane West Penn Avenue and passes through residential areas with a few businesses. The road becomes East Penn Avenue in the commercial center of town and continues east past more homes. US 422 leaves Wernersville and once again follows the border between Lower Heidelberg Township to the north and South Heidelberg Township to the south along Penn Avenue. The road gains a center turn lane and runs through agricultural areas with some residences and commercial establishments. The route crosses theCacoosing Creek into the borough ofSinking Spring and becomes two lanes, following Penn Avenue past a mix of homes and businesses. In the eastern part of Sinking Spring, US 422 widens to four lanes and comes to an intersection with the western terminus ofPA 724. Past this intersection, the road becomes three lanes with a center turn lane and continues through residential and commercial areas, leaving Sinking Spring forSpring Township, where it passes through the community ofSpringmont. The route continues east through developed areas and heads through the community ofWest Lawn. US 422 enters the borough ofWyomissing and widens to a four-lane divided highway. Here, it comes to an interchange with theUS 222 freeway and the western terminus ofUS 422 Bus., which continues east along Penn Avenue.[8][11]

At this interchange, US 422 becomesconcurrent with US 222, and the two routes continue east-northeast along the six-laneWarren Street Bypass, afreeway that runs between residential areas to the northwest and Norfolk Southern's Harrisburg Line to the southeast. The freeway curves north into business areas and comes to a partial cloverleaf interchange with State Hill Road. Following this, US 222/US 422 passes between theBerkshire Mall to the west and commercial areas to the east before it reaches an interchange with Paper Mill Road and Crossing Drive, where it curves to the northeast and runs near more businesses. The freeway comes to an interchange where US 222 splits to the northwest, US 422 immediately afterward splits southeast along the West Shore Bypass, and, straight ahead,PA 12 begins northeast along the Warren Street Bypass. Following this interchange, US 422 heads southeast along the West Shore Bypass, a four-lane freeway that runs between residential areas to the southwest and the Tulpehocken Creek to the northeast. The road passes under Norfolk Southern'sReading Line and comes to adiamond interchange with North Wyomissing Boulevard. The route follows the west bank of theSchuylkill River as it continues southeast and passes under Norfolk Southern's Harrisburg Line #2, crossing into the borough ofWest Reading. US 422 runs between the river to the northeast and Norfolk Southern's Harrisburg Line #1 to the southwest before reaching acloverleaf interchange with US 422 Bus. Following this, the freeway heads south between the Schuylkill River to the east and industrial areas to the west, passing through a smallexclave ofCumru Township and crossing over theSchuylkill River Trail. The road curves southeast and crossesWyomissing Creek into the city ofReading, where it runs along the riverbank and comes to an interchange withUS 222 Bus. that has left exits and entrances. From here, the route heads southeast between wooded areas near the Schuylkill River to the northeast and the Schuylkill River Trail and urbanized areas to the southwest. The freeway turns east and crosses the river into Cumru Township, where it passes through woodland and comes to a bridge over Norfolk Southern's Harrisburg Line. US 422 crosses the Schuylkill River again and reaches atrumpet interchange with the northern terminus ofI-176. The road crosses the river a third time and entersExeter Township, passing over Norfolk Southern's Harrisburg Line #2 and running between residential areas to the north and industrial areas to the south before reaching an eastbound exit and westbound entrance with Neversink Road that provides access to the borough ofMount Penn. From here, US 422 passes near more development before it comes to a westbound exit and eastbound entrance with the eastern terminus of US 422 Bus., at which point the freeway ends.[8][11]

From here, US 422 heads southeast as Perkiomen Avenue, a four-lane divided highway with occasionaljughandles that is lined with businesses. The route passes north of the community ofLorane as it continues through suburban residential and commercial development, crossingAntietam Creek. The road runs southeast through a mix of woodland and development before the eastbound and westbound lanes split as it reaches an intersection with the northern terminus ofPA 345 in the community ofBaumstown. Following this intersection, US 422 continues east as a one-way pair through wooded areas with some residences and businesses, crossing intoAmity Township. Both directions of the route rejoin and the route heads southeast as four-lane divided Benjamin Franklin Highway, crossingMonocacy Creek and passing farm fields before running through wooded areas with some commercial development. The road passes south of a residential development before the eastbound and westbound lanes split again, running a short distance to the north of Norfolk Southern's Harrisburg Line. US 422 curves southeast and heads into businesses areas, coming to an intersection with the southern terminus ofPA 662 in the community ofDouglassville. Following this, the route curves to the east before both directions rejoin. US 422 splits from Benjamin Franklin Highway by heading southeast onto a four-lane freeway called the Pottstown Bypass at an eastbound exit and westbound entrance. Benjamin Franklin Highway continues east and the road runs through the borough ofPottstown as High Street before becomingRidge Pike east of Pottstown. Past the split with Benjamin Franklin Highway, the freeway passes over Norfolk Southern's Harrisburg Line and the Schuylkill River Trail before it entersDouglass Township and heads east-southeast through wooded areas to the north of the Schuylkill River.[8][11]

US 422 entersWest Pottsgrove Township inMontgomery County and comes to an interchange with Grosstown Road that provides access to the community ofStowe. The freeway curves northeast and continues to follow the Schuylkill River before it turns east and passes through a corner of the borough of Pottstown prior to crossing the river.[8][12] At this point, the route entersNorth Coventry Township inChester County and runs between woods to the north and farm fields to the south before passing near development and coming to a cloverleaf interchange withPA 100. Past this interchange, the road heads through the community ofSouth Pottstown, which is across the river from the borough of Pottstown, and comes to a westbound exit and eastbound entrance with South Hanover Street. US 422 passes through woodland and reaches an eastbound exit and westbound entrance at Keim Street. A short distance later, the route comes to a trumpet interchange connecting to PA 724 to the south in the community ofKenilworth.[8][13] From here, the road turns northeast and crosses the Schuylkill River intoLower Pottsgrove Township in Montgomery County, reaching a diamond interchange with Armand Hammer Boulevard in an industrial area. The freeway passes over Norfolk Southern's Pottstown Industrial Track and Harrisburg Line before running near residential and commercial development and turning to the east. US 422 heads between the community ofSanatoga to the north and woodland to the south before it reaches a partial cloverleaf interchange with Evergreen Road that provides access to Sanatoga. This interchange marks the end of the Pottstown Bypass designation of the US 422 freeway.[8][12]

From here, the four-lane US 422 freeway continues southeast as the Pottstown Expressway intoLimerick Township and passes between thePhiladelphia Premium Outlets to the southwest andHeritage Field Airport to the northeast, with theLimerick Generating Station, a nuclear power plant, located further to the southwest. The road runs near a mix of farmland and residential and commercial development, coming to a diamond interchange with Lewis Road that provides access to the communities ofLimerick andLinfield. Apark and ride lot is located within the southwest quadrant of this interchange. The route continues near more suburban development and reaches a diamond interchange with Township Line Road in a commercial area that serves the borough ofTrappe to the northeast and the borough ofRoyersford to the southwest. Past this interchange, the freeway entersUpper Providence Township and continues southeast past suburban housing developments. US 422 passes overPA 113 without an interchange before coming to a partial cloverleaf interchange withPA 29 that serves the borough ofCollegeville to the northeast and the borough ofPhoenixville the southwest. TheProvidence Town Center lifestyle center is located along PA 29 north of this interchange. Following this interchange, the road runs near office parks before heading through wooded areas with some farm fields, with the median widening. The route passes near housing developments and office complexes before the median narrows and it curves to the south. The freeway comes to a partial cloverleaf interchange with Egypt Road in the community ofOaks. From here, US 422 passes between a commercial area that includes the 422 Business Center office park (where theAmerican Treasure Tour is located) and theGreater Philadelphia Expo Center to the west and the Lower Perkiomen Valley Park to the east.[8][12]

The road crosses thePerkiomen Trail and thePerkiomen Creek intoLower Providence Township and becomes parallel to the Schuylkill River Trail to the west, making a sharp turn to the east and passing through woods and fields withinValley Forge National Historical Park. The route comes to a partial cloverleaf interchange with the southern terminus ofPA 363 that provides access to the communities ofAudubon andTrooper, where it entersWest Norriton Township and makes a turn to the south, gaining a third auxiliary lane in each direction. US 422 heads over the Schuylkill River Trail before it crosses the Schuylkill River on the Schuylkill River Crossing Complex east of the parallelSullivan's Bridge intoUpper Merion Township, where it becomes the County Line Expressway. The freeway passes over Norfolk Southern's Harrisburg Line before reaching a partial cloverleaf interchange withPA 23 to the east of the Visitor Center at Valley Forge National Historical Park. From here, the route heads into the community ofKing of Prussia as a four-lane freeway and passes to the west of business parks and theValley Forge Casino Resort, coming to an eastbound exit and entrance with First Avenue that serves the business parks and the casino.[8][12] At this point, the road entersTredyffrin Township in Chester County and runs a short distance west of the border with Upper Merion Township in Montgomery County. The freeway passes under thePennsylvania Turnpike (I-76) and heads near commercial areas west of the Village at Valley Forge, a residential and retail development which contains theKing of Prussia Town Center lifestyle center. US 422 comes to its eastern terminus at a trumpet interchange with theUS 202 freeway that also has ramps connecting to Swedesford Road andI-76 eastbound to the city ofPhiladelphia. US 202 northbound provides access from US 422 to I-76 westbound and the Pennsylvania Turnpike at the western terminus of I-276 at theValley Forge interchange along with theKing of Prussia shopping mall.[8][13]
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The western segment was first signed in 1926.

Most of the highway in Ohio still runs along its original alignment. The section inParkman Township, Geauga County was twinned duringWorld War II. The four-lane divided highway was extended to Warren by 1950. Additionally, the eastern terminus of the segment was extended to theTacony–Palmyra Bridge inTacony, Philadelphia, The eastern terminus was moved toUS 1/US 13 inHunting Park in 1961.
Theexpressway bypass ofButler was built in the early 1960s. Previously, the road ran through downtown Butler.
The section that runs throughMoraine State Park near Butler was upgraded to expressway standards in 1969.
In 1971, an expressway bypass around downtown Youngstown opened.
In the 1970s, bypasses were built around the cities of New Castle, Kittanning, and Indiana. Sections of the Indiana bypass remained incomplete until 1995 and the Kittanning bypasses were completed in 2001. Part of the bypass in New Castle is now part of theInterstate Highway System, as an extension ofI-376 runs concurrent with US 422 for 3 miles (4.8 km).
The divided highway portion of US 422 connecting downtownSolon toI-271 andI-480 was originally signed[citation needed] as US 422 Alternate. In December 1992,[14] the freeway was extended eastward throughBainbridge Township across theLaDue Reservoir toSR 44 inAuburn Center, and US 422 was rerouted along I-271 and the former US 422 Alternate. The new freeway made US 422 a popular route for truckers and commuters and made the remaining two-lane portion in Geauga County particularly dangerous. The state has addedtraffic lights,rumble strips and extra width to the road to try to alleviate some of the danger. Prior to the realignment, US 422 originally ran along Chagrin Boulevard (formerly Kinsman Road) and Washington Street throughWoodmere,Pepper Pike,Moreland Hills,Chagrin Falls, and Bainbridge Township.
The eastern segment of US 422 was originally signed in 1927, running from US 22 in Reading toUS 309 in theChestnut Hill section of Philadelphia. The majority of the route from Pottstown to Philadelphia followed historicRidge Pike andGermantown Pike (as of 2025, the overpass of Ridge Pike over the Pennsylvania Turnpike (I-276) is still labeled with a designation of "U.S. 422").
In 1932, the western terminus was extended from Reading to Market Street in downtown Harrisburg.[15]
In 1958, plans were made to construct the West Shore Bypass, a bypass route around Reading running along the west shore of the Schuylkill River from the PA 12 intersection toExeter Township. Following its completion in 1965, the US 422 designation was moved onto the bypass, and the former routing through the city was designated asUS 422 Bus.[16]
In 1967, the Pottstown Bypass was completed, an 8.4-mile-long (13.5 km) limited-access bypass route running from Douglassville to Sanatoga and bypassing Pottstown to the south. The US 422 designation was subsequently moved off of High Street in Pottstown and onto the new bypass. In the same year, the County Line Expressway was completed, a 2.5-mile-long (4.0 km) freeway running from Trooper Road (PA 363) in Audubon to US 202 near King of Prussia. Although the County Line Expressway was originally signed as PA 363, the Pottstown Expressway was planned to connect the Pottstown Bypass with the County Line Expressway and create a continuous freeway alignment of US 422 from Douglassville to King of Prussia. This freeway was planned as an extension to the Schuylkill Expressway, which ends in King of Prussia.[17]
Construction on the Pottstown Expressway link began in sections in the early 1970s, with the first section between Lewis Road in Linfield and PA 29 being completed in 1978. Construction on the remaining links, however, were halted due to funding issues and delays asPennDOT experienced budget cuts in the late 1970s. Despite this, after the proposedI-895 freeway was cancelled in 1981, some of the funds were able to be used to complete the Pottstown Expressway. The section from PA 29 to the County Line Expressway was completed in 1984. Construction of this specific section experienced challenges in its routing, as the part of the route between Oaks and the County Line Expressway was planned to run near the historic properties ofMill Grove andFatland in Audubon. At the time, the Fatland property was owned by politicianPeter Camiel, who was also a member of thePennsylvania Turnpike Commission. In order to avoid potential conflict with Camiel, this stretch of the highway was built around the Fatland property, raising the cost of the highway by $3 million. Because of this, as US 422 departs Oaks, instead of heading southeast towards the PA 363 interchange, the highway turns southwest then sharply curves due east to avoid Mill Grove and Fatland, before turning south to PA 363. This curve has been colloquially named the "Camiel Curve" in reference to Camiel, and also the "St. Gabe's Curve" on traffic reports due to the curve's proximity to St. Gabriel's Hall in Audubon.[18] The sharpness of the curve has also caused it to be the site of several fatal crashes since the construction of the expressway.
The final portion of the Pottstown Expressway from the Pottstown Bypass to Lewis Road in Linfield opened in 1985, completing a continuous freeway from Douglassville to King of Prussia. As a result, the US 422 alignment was moved entirely onto the freeway, and the eastern terminus of the eastern segment was truncated nearly 15 miles west from Philadelphia to King of Prussia.

The completion of the Pottstown Expressway considerably shorted travel times for Pottstown area residents travelling to the King of Prussia and Philadelphia areas, and the completion of the expressway caused for multiple communities located along the US 422 corridor to experience significant population growth beginning in the 1990s, with Limerick Township, Upper Providence Township, and the borough of Trappe seeing the most growth.[19] As a result of the population growth, in the first decade of the 2000s, this segment of US 422 saw traffic volume increase by 50%. Volume reached 45,000 vehicles per day in Pottstown, and 110,000 vehicles per day at the Schuylkill River crossing between the PA 23 and PA 363 interchanges.[20]
In 1999, the interchange area in King of Prussia at the eastern terminus of US 422 underwent a massive, $290 million reconstruction project. Due to the convergence of multiple major highways (US 202, I-76, and the Pennsylvania Turnpike) near the eastern terminus of US 422, the interchange area frequently suffered from heavy congestion. The project included construction of new ramps and the widening of all intersecting roadways, including US 422. On US 422, one specific cause of congestion was due to the fact that drivers travelling from US 422 eastbound to I-76 eastbound had to briefly enter onto US 202 before immediately exiting to I-76 westbound. This was the same issue for drivers travelling from I-76 eastbound to US 422 westbound. As a result, newcollector-distributor ramps from US 422 eastbound to I-76 westbound, and from I-76 eastbound to US 422 westbound were constructed, allowing for a direct connection between US 422 and I-76 to be achieved. The project was completed in 2003.[21]
On June 22, 2000, the section of US 422 between US 422 Bus. and Shelbourne Road, along with US 422 Bus. betweenPA 562 and the eastern terminus at US 422 in Exeter Township was designated by an act of thePennsylvania General Assembly as the Albert Boscov Commemorative Highway, honoringAlbert Boscov, the longtime CEO of department store chainBoscov's.[22]
In 2009, a $12.2 million project funded by theAmerican Recovery and Reinvestment Act of 2009 began to resurface and improve over four miles of US 422 between the Trappe/Royersford and PA 29 interchanges. The project was completed in 2010.

As congestion continued to grow into the 2010s, local planning commissions created the "US 422 Corridor Master Plan". This plan detailed ways to address the future trends of traffic on US 422 through a set of sustainability programs, including: extendingSEPTA'sManayunk/Norristown Line regional rail service to Wyomissing (a partial restoration of rail service between Norristown and Pottsville that SEPTA abruptly terminated in July 1981), widening US 422 to six lanes from the PA 29 interchange to the eastern terminus at US 202, and additional road improvements. The rail project, along with the improvements proposed, would be funded by tolling the highway.[23] The tolls would be charged on a per-mile basis, and driving the entire segment between Pottstown and King of Prussia would cost $2. All tolls would beelectronically collected via theE-ZPass system.[24] The plan was debated in local municipalities in 2010, with many supporting the sustainability portions of the plan while strongly objecting to the charging of tolls.[25] On October 5, 2011, after increasing pressure and opposition, theDelaware Valley Regional Planning Commission cancelled the tolling proposal and announced they would seek other means of funding the proposed projects.[26][27]
In 2013, a $16.8 million project began to make the partial interchange with PA 363, which was originally a westbound exit and eastbound entrance, a full interchange by adding a ramp from PA 363 to westbound US 422 and from eastbound US 422 to PA 363.[28] The new ramps opened to traffic on December 1, 2015.[29]
The Schuylkill River crossing near Valley Forge had been a frequent source of congestion on this segment of US 422. Following the closure of another bridge over the river that ran parallel to US 422 in 1993, drivers travelling between PA 363 and PA 23 were forced to enter US 422, merge on to cross the river, then immediately exit at the next interchange, causing significant congestion in the area. Multiple proposals were made over the years to rebuild the former bridge, which was demolished in 1995. However, due to environmental concerns over the construction of the bridge, which would have been in close proximity toValley Forge National Historical Park, no proposal ever moved forward. One fix was made when a third westbound lane between the PA 23 and PA 363 interchanges was constructed in January 2009.[30] The project was completed by squeezing three westbound lanes onto the existing Schuylkill River crossing, shortening the lanes to 11 ft (3.4 m) and narrowing the median guard. The PA 23 interchange was also restructured in this project.[31][32] Despite the widening of the highway, congestion still lingered in the area, and the issue of the age of the twin bridges began to arise, as they were built as part of the original County Line Expressway in the 1960s. As a result, in 2016, a $97 million project began to replace the bridges with a wider bridge, and to improve the PA 363 and PA 23 interchanges. The project was completed in October 2020, with the current bridge now including four mainline travel lanes and a weaving lane in each direction for direct access between PA 363 and PA 23.[33][34]
Since 2012, a major reconstruction project of the original Pottstown Bypass segment of US 422 has been ongoing. The project has been divided into seven smaller projects, which includes repairing aging bridges, reconstructing interchanges, realigning US 422 near the Stowe interchange, and other improvements to the highway.[35][36]
Attempting to relieve the growing congestion, theSchuylkill Valley Metro was proposed in 2000, which would have been a rail service connecting Philadelphia to Reading and paralleling US 422 from King of Prussia into Berks County. However, in 2006, Pennsylvania governorEd Rendell announced that the project would not receive funding to move forward, and was considered dead.[37] Although similar rail lines have since been proposed to relieve traffic on this segment of US 422 and have failed to move forward, theSchuylkill River Passenger Rail proposal has been actively in planning stages since 2021.[38]
| State | County | Location | mi[1][2] | km | Exit | Destinations | Notes | |
|---|---|---|---|---|---|---|---|---|
| Ohio | Cuyahoga | Cleveland | 0.00 | 0.00 | Western terminus; western terminus of SR 14/SR 87; northern terminus of SR 8/SR 43 | |||
| 0.52 | 0.84 | Western end of SR 10 concurrency | ||||||
| 0.59 | 0.95 | I-90 exit 171 | ||||||
| 0.85 | 1.37 | Eastern end of SR 14/SR 43 concurrency | ||||||
| 1.50 | 2.41 | Eastern end of SR 10 concurrency; I-77 exit 162A | ||||||
| 2.36 | 3.80 | Eastern end of SR 87 concurrency | ||||||
| Shaker Heights | 8.78 | 14.13 | Eastern end of SR 8 concurrency | |||||
| Beachwood | 10.76 | 17.32 | Western end of SR 87 concurrency | |||||
| West end of freeway | ||||||||
| 10.97– 11.21 | 17.65– 18.04 | Eastern end of SR 87 concurrency, western end of I-271 concurrency; I-271 exit 29 | ||||||
| Orange | 12.16 | 19.57 | 28B | Harvard Road | Exit numbers follow I-271 | |||
| Bedford Heights | 13.09 | 21.07 | 28A | Eastbound exit and westbound entrance | ||||
| 13.13 | 21.13 | — | Eastern end of I-271 concurrency; eastbound exit and westbound entrance; I-271 exit 27A | |||||
| 13.13 | 21.13 | 13B | Westbound exit and eastbound entrance; access via unsigned I-480N; signed as exit 27B eastbound | |||||
| Solon | 16.14 | 25.97 | 16 | Cochran Road / Harper Road | ||||
| 17.91 | 28.82 | 18 | ||||||
| Geauga | Bainbridge Township | 23.17 | 37.29 | 23 | ||||
| Auburn Township | 29.56 | 47.57 | 29 | |||||
| East end of freeway | ||||||||
| Troy Township | 33.45 | 53.83 | ||||||
| Parkman Township | 37.76 | 60.77 | Southern terminus of SR 168/SR 528 | |||||
| 39.81 | 64.07 | Northern terminus of SR 282 | ||||||
| Portage | No major junctions | |||||||
| Trumbull | Southington Township | 44.37 | 71.41 | |||||
| 45.49 | 73.21 | |||||||
| Warren Township | 50.34– 50.36 | 81.01– 81.05 | Interchange | |||||
| Warren | 53.68 | 86.39 | ||||||
| 54.71 | 88.05 | Northern terminus of SR 169 | ||||||
| Niles | 58.89 | 94.77 | ||||||
| Weathersfield Township | 60.93 | 98.06 | Southern terminus of SR 169 | |||||
| Girard | 62.53 | 100.63 | ||||||
| 63.47– 63.51 | 102.15– 102.21 | I-80/SR 11 exit 227 | ||||||
| Mahoning | Youngstown | 65.57 | 105.52 | Interchange | ||||
| West end of freeway | ||||||||
| 66.63– 66.72 | 107.23– 107.38 | Western terminus of SR 289 | ||||||
| 67.21– 67.42 | 108.16– 108.50 | Belmont Avenue / Fifth Avenue –Downtown | ||||||
| 67.91 | 109.29 | Wick Avenue / Andrews Avenue –Youngstown State University | ||||||
| 68.07– 68.45 | 109.55– 110.16 | |||||||
| East end of freeway | ||||||||
| 68.68 | 110.53 | Westbound direction of SR 289 | ||||||
| Youngstown–Coitsville Township line | 72.36 | 116.45 | ||||||
| 74.92 0.000 | 120.57 0.000 | Ohio–Pennsylvania state line | ||||||
| Pennsylvania | Lawrence | Pulaski Township | 0.021 | 0.034 | Western terminus of PA 208 | |||
| Mahoning Township | 4.993 | 8.035 | ||||||
| Union Township | 7.145 | 11.499 | West end of freeway | |||||
| 7.776– 8.458 | 12.514– 13.612 | 12 | Western terminus of I-376 concurrency; western terminus of US 422 Bus.; access to US 422 west from I-376 east via Pulaski Road | |||||
| 9.055– 9.548 | 14.573– 15.366 | 13 | ||||||
| 10.077– 10.577 | 16.217– 17.022 | 15 | Eastern terminus of I-376 concurrency | |||||
| Taylor Township | 12.409– 12.545 | 19.970– 20.189 | ||||||
| Shenango Township | 15.051– 15.405 | 24.222– 24.792 | ||||||
| 16.095– 16.284 | 25.902– 26.207 | Eastern terminus of US 422 Bus. | ||||||
| 16.206 | 26.081 | East end of freeway | ||||||
| 17.976 | 28.930 | |||||||
| Butler | Muddy Creek Township | 22.797– 23.664 | 36.688– 38.084 | Interchange | ||||
| 24.820– 25.110 | 39.944– 40.411 | Exit 96 (I-79) | ||||||
| 25.110 | 40.411 | West end of freeway | ||||||
| 25.220– 25.330 | 40.588– 40.765 | North Shore | Access via West Park Road; servesMoraine State Park | |||||
| 27.442– 27.760 | 44.164– 44.675 | South Shore | Access via Pleasant Valley Road; servesMoraine State Park | |||||
| Franklin Township | 30.761– 31.186 | 49.505– 50.189 | ||||||
| 31.441 | 50.599 | East end of freeway | ||||||
| 32.654 | 52.552 | Eastern terminus of PA 488 | ||||||
| Butler Township | 35.786 | 57.592 | West end of freeway | |||||
| 36.566– 36.860 | 58.847– 59.320 | Northern terminus of PA 356 | ||||||
| 39.450– 39.834 | 63.489– 64.107 | |||||||
| Summit Township | 40.866– 41.163 | 65.767– 66.245 | ToPA 38; southern terminus of PA 38 | |||||
| 42.431– 42.585 | 68.286– 68.534 | Mitchell Hill Road | ||||||
| 42.725 | 68.759 | East end of freeway | ||||||
| Armstrong | East Franklin Township | 56.835 | 91.467 | West end of freeway | ||||
| 58.106– 58.237 | 93.513– 93.723 | Nolte Drive / Pleasant Valley Drive | ||||||
| 58.489– 58.945 | 94.129– 94.863 | Southern terminus of PA 268 and western terminus of US 422 Bus. | ||||||
| 58.863– 59.356 | 94.731– 95.524 | Western terminus of PA 28 concurrency | ||||||
| Manor Township | 61.258– 61.345 | 98.585– 98.725 | A | Western terminus of PA 66 concurrency | ||||
| 61.599– 61.934 | 99.134– 99.673 | B | ||||||
| 62.855– 63.253 | 101.155– 101.796 | Eastern terminus of PA 28 and PA 66 concurrencies; eastern terminus of US 422 Bus. | ||||||
| 63.128 | 101.595 | East end of freeway | ||||||
| Plumcreek Township | 75.228 | 121.068 | ||||||
| Indiana | Shelocta | 78.167 | 125.798 | Western terminus of PA 56 concurrency; northern terminus of PA 156 | ||||
| Armstrong Township | 82.427 | 132.653 | West end of freeway | |||||
| 83.060– 83.414 | 133.672– 134.242 | |||||||
| White Township | 85.245– 85.727 | 137.189– 137.964 | Western terminus of PA 286 Truck concurrency; toIndiana University of Pennsylvania | |||||
| 87.661– 88.079 | 141.077– 141.749 | A-B | Split into exits A (US 119 south) and B (US 119 north); eastern terminus of PA 56 and PA 286 Truck concurrencies | |||||
| 88.769– 89.255 | 142.860– 143.642 | |||||||
| Cherryhill Township | 93.823– 94.075 | 150.993– 151.399 | Chestnut Ridge | Westbound entrance, eastbound exit; access via Chestnut Ridge Road | ||||
| 94.285 | 151.737 | Westbound entrance, eastbound exit; western terminus of PA 553 | ||||||
| 95.884 | 154.310 | East end of freeway | ||||||
| 97.862 | 157.494 | Northern terminus of PA 259 | ||||||
| Pine Township | 102.496 | 164.951 | ||||||
| Cambria | Blacklick Township | 106.122 | 170.787 | Western terminus of PA 271 concurrency | ||||
| 106.534– 106.549 | 171.450– 171.474 | Eastern terminus of PA 271 concurrency | ||||||
| Cambria Township | 112.742– 112.928 | 181.441– 181.740 | Interchange; eastern terminus | |||||
| Gap in route | ||||||||
| Dauphin | Derry Township | 0.000– 0.157 | 0.000– 0.253 | Interchange; western terminus; eastern terminus of PA 39; no access from US 422 westbound to US 322 eastbound or from US 322 westbound to US 422 eastbound | ||||
| 2.397 | 3.858 | |||||||
| Lebanon | Palmyra | 6.227 | 10.021 | Northern terminus of PA 117 | ||||
| Annville Township | 10.223 | 16.452 | ||||||
| Lebanon | 15.143 | 24.370 | One-way pair | |||||
| 15.243 | 24.531 | One-way pair | ||||||
| Lebanon–South Lebanon Township line | 16.443 | 26.462 | Northern terminus of PA 897 (at westbound US 422) | |||||
| Myerstown | 21.525 | 34.641 | Southern terminus of PA 645 | |||||
| 21.871 | 35.198 | |||||||
| Berks | Womelsdorf | 28.292 | 45.532 | |||||
| Sinking Spring | 38.208 | 61.490 | Western terminus of PA 724 | |||||
| Wyomissing | 39.826 | 64.094 | Interchange; western terminus of US 422 Business; eastbound exit / westbound entrance only | |||||
| 40.256 | 64.786 | West end of freeway | ||||||
| 40.463 | 65.119 | Western end of US 222 concurrency; northbound US 222 entrance / southbound US 222 exit only; toPA 724 | ||||||
| 40.945– 41.250 | 65.895– 66.385 | State Hill Road | ||||||
| 41.538– 41.674 | 66.849– 67.068 | Crossing Drive / Paper Mill Road | Crossing Drive signed eastbound only | |||||
| 41.793– 42.480 | 67.259– 68.365 | East end of US 222 concurrency; western terminus of PA 12; toReading Regional Airport andFirstEnergy Stadium | ||||||
| 42.791– 42.963 | 68.865– 69.142 | North Wyomissing Boulevard | ||||||
| West Reading | 43.666– 43.909 | 70.274– 70.665 | ||||||
| Reading | 44.516– 44.816 | 71.642– 72.124 | Left exit; toPA 10 andAlvernia University | |||||
| Cumru Township | 46.844– 47.233 | 75.388– 76.014 | Northern terminus of I-176 | |||||
| Exeter Township | 48.260 | 77.667 | Mount Penn | Eastbound exit and westbound entrance; access via Neversink Road | ||||
| 49.009 | 78.872 | Westbound exit and eastbound entrance; eastern terminus of US 422 Business | ||||||
| 49.009 | 78.872 | East end of freeway | ||||||
| 52.670 | 84.764 | Northern terminus of PA 345 | ||||||
| Amity Township | 57.075– 57.215 | 91.853– 92.079 | Southern terminus of PA 662 | |||||
| 57.505 | 92.545 | West end of freeway | ||||||
| 57.505 | 92.545 | Benjamin Franklin Highway east –Stowe,Pottstown Business District | Eastbound exit and westbound entrance | |||||
| Montgomery | West Pottsgrove Township | 59.355– 59.813 | 95.523– 96.260 | Stowe | Access via Grosstown Road | |||
| Chester | North Coventry Township | 61.319– 61.579 | 98.683– 99.102 | |||||
| 61.765– 61.963 | 99.401– 99.720 | Hanover Street | Westbound exit and eastbound entrance; access toMontgomery County Community College Pottstown Campus andPottstown Business District | |||||
| 62.630 | 100.793 | Keim Street | Eastbound exit and westbound entrance | |||||
| 63.022– 63.281 | 101.424– 101.841 | |||||||
| Montgomery | Lower Pottsgrove Township | 63.591– 63.915 | 102.340– 102.861 | Armand Hammer Boulevard | ||||
| Lower Pottsgrove–Limerick township line | 66.096– 66.455 | 106.371– 106.949 | Sanatoga | Access via Evergreen Road; access toPhiladelphia Premium Outlets | ||||
| Limerick Township | 68.412– 68.841 | 110.098– 110.789 | Limerick,Linfield | Access via North Lewis Road | ||||
| 70.355– 70.707 | 113.225– 113.792 | Trappe,Royersford | Access via South Township Line Road | |||||
| Upper Providence Township | 73.707– 74.200 | 118.620– 119.413 | Access toUrsinus College | |||||
| 76.431– 76.981 | 123.004– 123.889 | Oaks,Audubon | Access via Egypt Road; access toNorristown | |||||
| Lower Providence–West Norriton township line | 79.888– 80.201 | 128.567– 129.071 | Southern terminus of PA 363 | |||||
| Upper Merion Township | 80.734– 81.074 | 129.929– 130.476 | Access toValley Forge National Historical Park andValley Forge Casino Resort | |||||
| Chester | Tredyffrin Township | 81.392– 81.488 | 130.988– 131.142 | First Avenue | Eastbound exit and entrance | |||
| 82.405– 82.560 | 132.618– 132.867 | Eastern terminus of US 422 eastern section; exit 328A on I-76 | ||||||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | ||||||||