# 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 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.

## Primary Interstate Highways

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| I-70 | 167.92 | 270.24 | I-70 at West Virginia border in Donegal Township | I-70/US 522 at Maryland border near Warfordsburg | 01956-01-011956 | current | |
| I-70S | 36.7 | 59.1 | I-70/I-79 in North Beaver Township | I-70/I-80S/Penna Turnpike in New Stanton | 01957-01-011957 | 01964-01-011964 | I-70S bypassed Pittsburgh to the south; I-70 rerouted to avoid Pittsburgh onto I-70S |
| I-76 | 349.67 | 562.74 | I-76 at Ohio border in North Beaver Township | I-76 at New Jersey border in Philadelphia | 01964-01-011964 | current | |
| I-78 | 75.23 | 121.07 | I-81 in Union Township | I-78 at New Jersey border in Williams Township | 01956-01-011956 | current | Briefly designated as I-80N from 1957 to 1958 |
| I-79 | 182.72 | 294.06 | I-79 at West Virginia border in Perry Township | Bayfront Parkway in Erie | 01956-01-011956 | current | Called the Raymond P. Shafer Highway for its entire length |
| I-80 | 311.07 | 500.62 | I-80 at Ohio border in Shenango Township | I-80 at New Jersey border in Delaware Water Gap | 01956-01-011956 | current | |
| I-80S | 349.67 | 562.74 | I-80S at Ohio border in North Beaver Township | I-80S at New Jersey border in Philadelphia | 01956-01-011956 | 01964-01-011964 | Renumbered to I-76 to conform to AASHTO policy against suffixed routes |
| I-81 | 232.63 | 374.38 | I-81 at Maryland border near Greencastle | I-81 at New York border near Hallstead | 01956-01-011956 | current | Called the American Legion Memorial Highway while in Pennsylvania |
| I-83 | 50.8 | 81.8 | I-83 at Maryland border near Shrewsbury | I-81/US 322 in Harrisburg | 01956-01-011956 | current | Known as the Veterans of Foreign Wars of the United States Memorial Highway as well as the Harrisburg–York–Baltimore Expressway |
| I-84 | 54.55 | 87.79 | I-81/I-380/US 6 in Dunmore | I-84 at New York border in Matamoras | 01958-01-011958 | current | |
| I-86 | 6.99 | 11.25 | I-90 in Greenfield Township | I-86 at New York border in North East Township | 01999-01-011999 | current | Named the Hopkins-Bowser Highway; portion of its future route maintained by New York State |
| I-90 | 46.4 | 74.7 | I-90 at Ohio border in Springfield Township | I-90 at New York border in North East Township | 01956-01-011956 | current | Known as the AMVETS Memorial Highway |
| I-95 | 44.25 | 71.21 | I-95 at Delaware border near Marcus Hook | I-95 at New Jersey border near Bristol | 01956-01-011956 | current | Known as the Vietnam Veterans Memorial Highway |
| I-99 | 85.780 | 138.050 | I-70/I-76/US 220 near Bedford | US 220/PA 26 near Bellefonte | 01998-01-011998 | current | Known as the Appalachian Thruway; will eventually extend to the New York state line |
| Former ||||||||

## Auxiliary Interstate Highways

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| I-176 | 11.33 | 18.23 | I-76 in Morgantown | US 422 near Reading | 01964-01-011964 | current | Also called the Morgantown Expressway |
| I-178 | — | — | — | — | — | 01971-01-011971 | Cancelled |
| I-179 | — | — | — | — | 01958-01-011958 | 01968-01-011968 | Replaced by its parent route, I-79 |
| I-180 | 28.85 | 46.43 | I-99/US 15/US 220 in Williamsport | I-80/PA 147 near Milton | 01984-01-011984 | current | |
| I-180 | — | — | — | — | — | 01964-01-011964 | Now part of I-176 |
| I-276 | 29.78 | 47.93 | I-76 in King of Prussia | I-95 and I-295 in Bristol Township | 01964-01-011964 | current | |
| I-280 | — | — | — | — | 01958-01-011958 | 01964-01-011964 | Now part of Pennsylvania Turnpike |
| I-279 | 13.32 | 21.44 | I-376/US 22/US 30 in Pittsburgh | I-79 in Franklin Park | 01972-01-011972 | current | Also known as the Parkway North, North Shore Expressway, East Street Valley Expressway and the Raymond E. Wilt Memorial Highway |
| I-283 | 2.91 | 4.68 | I-76 near Highspire | I-83/US 322 near Harrisburg | 01972-01-011972 | current | The highway is entirely in Dauphin County and Lancaster County, Pennsylvania and is an eastern shore bypass of Harrisburg. |
| I-295 | 10.324 | 16.615 | I-95/I-276 in Bristol Township | I-295 at New Jersey border near Yardley | 02018-01-012018 | current |
| I-376 | 84.70 | 136.31 | I-80/PA 760 in Shenango Township | I-76/US 22 in Monroeville | 01972-01-011972 | current | Follows the Beaver Valley Expressway, the James E. Ross Highway, and the Penn-Lincoln Parkway |
| I-378 | — | — | — | — | 01968-01-011968 | 01971-01-011971 | Replaced by PA 378 |
| I-380 | 28.25 | 45.46 | I-80 in Tunkhannock Township | I-81/I-84/US 6 in Dunmore | 01973-01-011973 | current | Known as the Scranton-Dunmore Expressway in Scranton |
| I-476 | 132.10 | 212.59 | I-95 in Woodlyn | I-81/US 6/US 11 in Clarks Summit | 01964-01-011964 | current | Longest Auxiliary Interstate in Pennsylvania and the United States. |
| I-479 | — | — | — | — | 01966-01-011966 | 01971-01-011971 | Early number for I-579 |
| I-480 | — | — | — | — | 01958-01-011958 | 01964-01-011964 | Now part of I-476 |
| I-495 | — | — | — | — | 01956-01-011956 | 01958-01-011958 | Early number for I-476 |
| I-579 | 1.57 | 2.53 | PA 885 in Pittsburgh | I-279/US 19 Truck/PA 28 in Pittsburgh | 01962-01-011962 | current | Called the Crosstown Boulevard |
| I-676 | 2.15 | 3.46 | I-76/US 30 in Philadelphia | I-676/US 30 at New Jersey border in Philadelphia | 01964-01-011964 | current | Called the Vine Street Expressway |
| I-695 | — | — | I-95 near Philadelphia International Airport | I-95 in Philadelphia | 01964-01-011964 | 01977-01-011977 | Never built |
| I-876 | — | — | — | — | 01971-01-011971 | 01972-01-011972 | Short lived renumbering of I-479, now I-579 |
| I-895 | — | — | I-295 in Burlington, NJ | I-95 in Bristol | 01963-01-011963 | 01981-01-011981 | Never built |
| Former ||||||||

## Business routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| I-83 BL | 6.81 | 10.96 | I-83 in York Township | I-83/PA 181 in Manchester Township | 01957-01-011957 | current | Serves York, running along George Street; only Interstate business route in Pennsylvania until 2009 |
| I-376 BL | 6.26 | 10.07 | I-376 in Findlay Township | I-376 in Moon Township | 02009-01-012009 | current | Runs along Airport Parkway near the Pittsburgh International Airport |

## Gallery

* Entering Pennsylvania on I-86 westbound in Erie County
* 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