List of Interstate Highways in Pennsylvania

The list of Interstate Highways in Pennsylvania encompasses 23 Interstate Highways—12 primary routes and 11 auxiliary routes—which exist entirely or partially in the U.S. state of Pennsylvania. In Pennsylvania, most of the Interstate highways are maintained by the Pennsylvania Department of Transportation (PennDOT). Some stretches are also maintained by the Pennsylvania Turnpike Commission, Delaware River Port Authority, the Delaware River Joint Toll Bridge Commission, and 2 short stretches maintained by the New York State Department of Transportation (these being the Delaware River bridge on Interstate 84 and a short stretch of the future Interstate 86 in Bradford County). Interstate highways make up three percent of all roadway lane miles in Pennsylvania and have a combined length of 1,953 mi (3,143 km) within the state. Twenty-four percent of all vehicle traffic is on the Interstate system.[1]

Interstate Highways of the Pennsylvania State Route System

Route markers for Interstate 83, Interstate 376, Interstate 83 Business, and Interstate 376 Business
Map of Interstate Highways in Pennsylvania
System information
NotesAll routes are assigned State Route (SR X) numbers, usually corresponding to the signed numbers. Interstates are generally state-maintained.
Highway names
InterstatesInterstate X (I-X)
Business Loops:Interstate X Business (I-X Bus.)
System links

Primary Interstate Highways
Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-70 167.92270.24 I-70 at West Virginia border in Donegal TownshipI-70/US 522 at Maryland border near Warfordsburg 01956-01-011956current Interstate 70 enters Pennsylvania at the West Virginia state line one mile (1.6 km) west of West Alexander in Washington County. The highway multiplexes with I-76 from Exit 75 to Exit 161 as the Pennsylvania Turnpike. In Breezewood, I-70 leaves I-76 and the Pennsylvania turnpike veering south toward the Maryland border. It exits the state two miles (3 km) east of Warfordsburg in Fulton County.[3][4]
I-70S 36.759.1 I-70/I-79 in North Beaver TownshipI-70/I-80S/Penna Turnpike in New Stanton 01957-01-01195701964-01-011964 I-70S bypassed Pittsburgh to the South; I-70 rerouted to avoid Pittsburgh onto I-70S
I-76 349.67562.74 I-76 at Ohio border in North Beaver TownshipI-76 at New Jersey border in Philadelphia 01964-01-011964current Interstate 76 enters Pennsylvania at the Ohio border northwest of Enon Valley in Lawrence County as the Pennsylvania Turnpike. The highway initially heads southeast through Pittsburgh to Somerset before turning east. At Exit 326, the highway becomes the Schuylkill Expressway. I-76 leaves the state at the New Jersey state line in Philadelphia via the Walt Whitman Bridge.[3][4]
I-78 75.23121.07 I-81 in Union TownshipI-78 at New Jersey border in Williams Township 01956-01-011956current Interstate 78 begins at I-81 five miles (8 km) west of Fredericksburg in Lebanon County. It is multiplexed with U.S. Route 22 as the William Penn Highway from Exit 8 in Fredericksburg to Exit 51 in Allentown. The highway was briefly designated as I-80N from 1957 to 1958. I-78 exits Pennsylvania and enters New Jersey via the Interstate 78 Toll Bridge in Easton.[3][4]
I-79 182.72294.06 I-79 at West Virginia border in Perry TownshipBayfront Parkway in Erie 01956-01-011956current Interstate 79 enters Pennsylvania at the West Virginia state line one mile (1.6 km) south of Mount Morris in Greene County. The highway travels north to Erie, bypassing Pittsburgh. I-79 is named to Raymond P. Shafer Highway for its entire length. Between Exits 65 and 68, I-79 is part of the Yellow Belt of the Pittsburgh Belt System. The only multiplex on the route is with I-70 in Washington from Exit 34 to Exit 38. The interstate ends at PA 5/PA 290 and the Bayfront Parkway at Exit 183 in Erie.[3][4]
I-80 311.07500.62 I-80 at Ohio border in Shenango TownshipI-80 at New Jersey border in Delaware Water Gap 01956-01-011956current Interstate 80 enters Pennsylvania at the Ohio state line three miles (5 km) west of West Middlesex in Mercer County. The route is known as the Z.H. Confair Memorial Highway and the Keystone Shortway. I-80 passes through no major cities while in Pennsylvania. It leaves the state and enters New Jersey via the Delaware Water Gap Toll Bridge in Stroudsburg, Monroe County.[3][4]
I-80S 349.67562.74 I-80S at Ohio border in North Beaver TownshipI-80S at New Jersey border in Philadelphia 01956-01-01195601964-01-011964 Renumbered as I-76 to conform to AASHTO policy against suffixed routes
I-81 232.63374.38 I-81 at Maryland border near GreencastleI-81 at New York border near Hallstead 01956-01-011956current Interstate 81 is the longest north-south interstate in Pennsylvania. It enters the state at the Maryland state line in Franklin County and heads northeast to Scranton, bypassing Harrisburg, before turning north for New York. It is known as the American Legion Memorial Highway while in Pennsylvania. In the Harrisburg area, I-81 is also part of the Capital Beltway. The interstate leaves Pennsylvania at the New York border two miles (3 km) north of Great Bend in Susquehanna County.[3][4]
I-83 50.881.8 I-83 at Maryland border near ShrewsburyI-81/US 322 in Harrisburg 01956-01-011956current Interstate 83 enters Pennsylvania at the Maryland border four miles (6 km) south of Shrewsbury in York County and heads north for York and Harrisburg. The road is known as the Veterans of Foreign Wars of the United States Memorial Highway as well as the Harrisburg-York-Baltimore Expressway. While in Harrisburg it is also known as the Capital Beltway. I-83 ends at I-81 at Exit 70 in Harrisburg.[3][4]
I-84 54.5587.79 I-81/I-380/US 6 in DunmoreI-84 at New York border in Matamoras 01958-01-011958current Interstate 84 begins at I-81 at Exit 187 in Dunmore and heads east to the New York state line over the Delaware River on a bridge maintained by New York State in Matamoras. Originally, plans were made to build the interstate to cross extreme northern Pennsylvania, but the mountains proved to be too big of a challenge. Scranton is the only major city on the route.[3][4]
I-86 6.9911.25 I-90 in Greenfield TownshipI-86 at New York border in North East Township 01999-01-011999current Only seven miles of Interstate 86 is in Pennsylvania. It begins east of Erie from I-90 at Exit 37 to the New York state line south of North East. The interstate is named the Hopkins-Bowser Highway.[3][4] A portion of its future route, along New York State Route 17 enters Bradford County but is maintained by New York State.
I-90 46.474.7 I-90 at Ohio border in Springfield TownshipI-90 at New York border in North East Township 01956-01-011956current Interstate 90, known as the AMVETS Memorial Highway, enters Pennsylvania from Ohio three miles (5 km) west of Springfield and exits at the New York border two miles (3 km) east of North East. The highway crosses Erie County along the lake, bypassing the city of Erie.[3][4]
I-95 44.2571.21 I-95 at Delaware border near Marcus HookI-95 at New Jersey border near Bristol 01956-01-011956current Interstate 95 enters Pennsylvania from Delaware at Marcus Hook in Delaware County. I-95, known as the Vietnam Veterans Memorial Highway, passes through Delaware, Philadelphia, and Bucks counties along the Delaware River before leaving the state and entering New Jersey via the Delaware River–Turnpike Toll Bridge in Bristol.[3][4]
I-99 85.780138.050 I-70/I-76/US 220 near BedfordI-80/US 220 near Bellefonte 01998-01-011998current Interstate 99 is an incomplete highway in central Pennsylvania. It is known as the Appalachian Thruway and is located entirely within the state. It begins at Business US 220 in Bedford, Bedford County. It continues north through Altoona and State College before ending at a non-freeway interchange with I-80 near Bellefonte. The entirety of the current route is multiplexed with US 220. It will eventually extend northward along US 220 to Williamsport, and along US 15 from there to the New York border to Interstate 86 in Painted Post, New York.[3][4]

Auxiliary Interstate Highways
Number Length (mi)[5] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-176 11.3318.23 I-76 in MorgantownUS 422 near Reading 01964-01-011964current Interstate 176, also called the Morgantown Expressway, connects Reading to the turnpike in Morgantown. It begins at I-76 at Exit 298 in and ends in Reading at US 422.[3][4]
I-178 —— —— —01971-01-011971 Cancelled
I-179 —— —— 01958-01-01195801968-01-011968 Replaced by its parent route, I-79
I-180 28.8546.43 US 15/US 220 in WilliamsportI-80/PA 147 near Milton 01984-01-011984current Interstate 180 is a 29-mile (47 km) road that connects Williamsport, Lycoming County, to I-80 at Exit 212B near Milton in Northumberland County. The route begins at US 15/US 220 at Exit 29.[3][4]
I-180 —— —— —01964-01-011964 Now part of I-176
I-276 29.7847.93 I-76 in King of PrussiaI-95 and I-295 in Bristol Township 01964-01-011964current Interstate 276 begins at Exit 326 in King of Prussia, Montgomery County, and ends in Bristol Township at the I-95 and I-295 interchange with the Pennsylvania Turnpike.[3][4]
I-280 —— —— 01958-01-01195801964-01-011964 Now part of Pennsylvania Turnpike
I-279 13.3221.44 I-376/US 22/US 30 in PittsburghI-79 in Franklin Park 01972-01-011972current Interstate 279, also known as the Parkway North, begins at I-376 at the Fort Pitt Bridge in Pittsburgh. It travels 13 miles (21 km) north through downtown Pittsburgh before joining I-79 at Exit 72 in Franklin Park. Other names for the road are the North Shore Expressway, East Street Valley Expressway and the Raymond E. Wilt Memorial Highway.[3][4]
I-283 2.914.68 I-76 near HighspireI-83/US 322 near Harrisburg 01972-01-011972current Interstate 283 begins at I-76 Exit 247 in Highspire and ends at I-83 Exit 46A in Paxtang. The highway is entirely in Dauphin County and is an eastern shore bypass of Harrisburg.[3][4]
I-295 10.32416.615 I-95/I-276 in Bristol TownshipI-295 at New Jersey border near Yardley 02018-01-012018current Interstate 295 begins at the I-95/I-276/PA Turnpike interchange and travels east to the Scudder Falls Bridge to New Jersey.[3][4]
I-376 84.70136.31 I-80/PA 760 in Shenango TownshipI-76/US 22 in Monroeville 01972-01-011972current Interstate 376 begins at I-80 near Sharon and follows the Beaver Valley Expressway and the James E. Ross Highway south to Pittsburgh International Airport. From there, the route continues east along the Penn-Lincoln Parkway to I-76 exit 57 in Monroeville. It is concurrent with U.S. Route 22 (the William Penn Highway) east of PA 60 and with US 30 (the Lincoln Highway) from PA 60 to Wilkinsburg.[3][4]
I-378 —— —— 01968-01-01196801971-01-011971 Replaced by PA Route 378
I-380 28.2545.46 I-80 in Tunkhannock TownshipI-81/I-84/US 6 in Dunmore 01973-01-011973current Interstate 380, known as the Scranton-Dunmore Expressway in Scranton, begins at I-80 at Exit 293 in Crescent Lake, Monroe County. It ends at I-81 at Exit 187 in Scranton. The Interstate gives Scranton direct access to the Pocono Mountains.[3][4]
I-476 132.10212.59 I-95 in WoodlynI-81/US 6/US 11 in Clarks Summit 01964-01-011964current Interstate 476, the Blue Route, begins at I-95 Exit 7 in Chester in Delaware County. At Exit 20, the highway becomes the PA Turnpike Northeast Extension. The highway travels north around Philadelphia and through Montgomery, Bucks, Lehigh, Carbon and Luzerne counties. It passes Allentown before it ends in Clarks Summit near Scranton at I-81/US 6/US 11. It is the longest Auxiliary Interstate in Pennsylvania and the United States.[3][4]
I-479 —— —— 01966-01-01196601971-01-011971 Early number for I-579
I-480 —— —— 01958-01-01195801964-01-011964 Now part of I-476
I-495 —— —— 01956-01-01195601958-01-011958 Early number of I-476
I-576 5.538.90 I-376 in Findlay TownshipU.S. 22 in Robinson Township proposed— Interstate 576 will begin at the Pittsburgh International Airport and will travel in an east-west direction along the Southern Beltway route in Pittsburgh, terminating at the Mon-Fayette Expressway (Pennsylvania Route 43). Route is currently designated as Pennsylvania Route 576, but will most likely be upgraded to Interstate Highway status after the Southern Beltway is completed.[3][4]
I-579 1.572.53 PA 885 in PittsburghI-279/US 19 Truck/PA 28 in Pittsburgh 01962-01-011962current The Crosstown Boulevard is a short Interstate in Pittsburgh. It connects the Boulevard of the Allies (PA 885) to I-279 at exit 8A.[3][4]
I-581 7.3611.84 I-81 in Hampden TownshipI-83 in Lemoyne proposed— Part of the Capital Beltway, currently designated as PA 581.
I-676 2.153.46 I-76/US 30 in PhiladelphiaI-676/US 30 at New Jersey border in Philadelphia 01964-01-011964current The Vine Street Expressway takes traffic out of Philadelphia into New Jersey via the Benjamin Franklin Bridge. The route begins at Exit 344 of I-76.[3][4]
I-695 —— I-95 near Philadelphia International AirportI-95 in Philadelphia, PA 01964-01-01196401977-01-011977 Never built
I-876 —— —— 01971-01-01197101972-01-011972 Short lived renumbering of I-479, now I-579
I-895 —— I-295 in Burlington, NJI-95 in Bristol, PA 01963-01-01196301981-01-011981 Never built
  •       Former
  •       Future

Business routes
Number Length (mi)[4] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I‑83 Bus. 6.8110.96 I-83 in York TownshipI-83/PA 181 in Manchester Township 01957-01-011957current Interstate 83 Business passes through the city of York, running along George Street.[3][4] It was the only Interstate business route in Pennsylvania until 2009.
I‑376 Bus. 6.2610.07 I-376 in Findlay TownshipI-376 in Moon Township 02009-01-012009current Interstate 376 Business runs along Airport Parkway near the Pittsburgh International Airport.[3][4]
  •       Former
  •       Future
  • I-95 at I-276 exit
  • I-90 at I-79 exit
  • I-81 at I-78 exit
  • I-99 to I-80
  • I-176 end at US 422
  • I-83 and I-283
  • I-476 north of US 1
  • I-376 in Pittsburgh
  • I-70 and I-76 at eastern split
  • I-76 approaching I-676
  • I-79 at I-70

See also
  • U.S. Roads portal
  • Pennsylvania portal

References
  1. "KEY FACTS ABOUT PENNSYLVANIA'S INTERSTATE HIGHWAY SYSTEM" (PDF). Tripnet.org. Retrieved 2008-06-15.
  2. "Route Log - Main Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 1". Federal Highway Administration. Retrieved May 10, 2016.
  3. Jeffrey J. Kitsko (2000–2008). "Pennsylvania Highways". Retrieved 2008-07-09.
  4. "Google Maps". 2008. Retrieved 2008-07-09.
  5. "Route Log - Auxlilary Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 1". Federal Highway Administration. Retrieved May 10, 2016.

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