Interstate Highways of the Pennsylvania State Route System

Interstate 83 marker

Interstate 376 marker


Interstate 83 Business marker

Interstate 376 Business marker

Route markers for Interstate 83, Interstate 376, Interstate 83 Business, and Interstate 376 Business
Interstate Highways highlighted in red
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

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 two short stretches maintained by the New York State Department of Transportation (these being the Delaware River bridge on Interstate 84 (I-84) and a short stretch of the future I-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]

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
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
I-78 75.23121.07 I-81 in Union TownshipI-78 at New Jersey border in Williams Township 01956-01-011956current Briefly designated as I-80N from 1957 to 1958[3]
I-79 182.72294.06 I-79 at West Virginia border in Perry TownshipBayfront Parkway in Erie 01956-01-011956current Called the Raymond P. Shafer Highway for its entire length[3]
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
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 to 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 Called the American Legion Memorial Highway while in Pennsylvania[3]
I-83 50.881.8 I-83 at Maryland border near ShrewsburyI-81/US 322 in Harrisburg 01956-01-011956current Known as the Veterans of Foreign Wars of the United States Memorial Highway as well as the Harrisburg–York–Baltimore Expressway[3]
I-84 54.5587.79 I-81/I-380/US 6 in DunmoreI-84 at New York border in Matamoras 01958-01-011958current
I-86 6.9911.25 I-90 in Greenfield TownshipI-86 at New York border in North East Township 01999-01-011999current Named the Hopkins-Bowser Highway;[3] portion of its future route 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 Known as the AMVETS Memorial Highway[3]
I-95 44.2571.21 I-95 at Delaware border near Marcus HookI-95 at New Jersey border near Bristol 01956-01-011956current Known as the Vietnam Veterans Memorial Highway[3]
I-99 85.780138.050 I-70/I-76/US 220 near BedfordI-80/US 220 near Bellefonte 01998-01-011998current Known as the Appalachian Thruway; will eventually extend to the New York state line[3]
  •       Former

Auxiliary Interstate Highways

Number Length (mi)[4] 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 Also called the Morgantown Expressway[3]
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
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
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 Also known as the Parkway North, North Shore Expressway, East Street Valley Expressway and the Raymond E. Wilt Memorial Highway[3]
I-283 2.914.68 I-76 near HighspireI-83/US 322 near Harrisburg 01972-01-011972current The highway is entirely in Dauphin County and is an eastern shore bypass of Harrisburg.[3]
I-295 10.32416.615 I-95/I-276 in Bristol TownshipI-295 at New Jersey border near Yardley 02018-01-012018current
I-376 84.70136.31 I-80/PA 760 in Shenango TownshipI-76/US 22 in Monroeville 01972-01-011972current Follows the Beaver Valley Expressway, the James E. Ross Highway, and the Penn-Lincoln Parkway[3]
I-378 —— —— 01968-01-01196801971-01-011971 Replaced by PA 378
I-380 28.2545.46 I-80 in Tunkhannock TownshipI-81/I-84/US 6 in Dunmore 01973-01-011973current Known as the Scranton-Dunmore Expressway in Scranton[3]
I-476 132.10212.59 I-95 in WoodlynI-81/US 6/US 11 in Clarks Summit 01964-01-011964current Longest Auxiliary Interstate in Pennsylvania and the United States.[3]
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 for I-476
I-576 19.230.9 I-376 in Findlay TownshipI-79 in Cecil Township proposed— Route is currently designated as PA 576, but will most likely be upgraded to Interstate Highway status after the Southern Beltway is completed.[3]
I-579 1.572.53 PA 885 in PittsburghI-279/US 19 Truck/PA 28 in Pittsburgh 01962-01-011962current Called the Crosstown Boulevard[3]
I-676 2.153.46 I-76/US 30 in PhiladelphiaI-676/US 30 at New Jersey border in Philadelphia 01964-01-011964current Called the Vine Street Expressway[3]
I-695 —— I-95 near Philadelphia International AirportI-95 in Philadelphia 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 01963-01-01196301981-01-011981 Never built
  •       Former
  •       Proposed and unbuilt

Business routes

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-83 BL 6.8110.96 I-83 in York TownshipI-83/PA 181 in Manchester Township 01957-01-011957current Serves York, running along George Street;[3] only Interstate business route in Pennsylvania until 2009
I-376 BL 6.2610.07 I-376 in Findlay TownshipI-376 in Moon Township 02009-01-012009current Runs along Airport Parkway near the Pittsburgh International Airport[3]

See also

References

  1. ↑ "Key Facts About Pennsylvania's Interstate Highway System" (PDF). TRIP. Archived from the original (PDF) on September 29, 2006. Retrieved June 15, 2008.
  2. ↑ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2021". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved July 26, 2022.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Kitsko, Jeffrey J. (2000–2008). "Interstate Highways". Pennsylvania Highways. Retrieved July 9, 2008.
  4. ↑ Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2021". Federal Highway Administration. Retrieved May 10, 2016.
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