Auxiliary Interstate Highways
| Highway | Length | Description |
|---|---|---|
| I-176 | 11 mi (18 km) | 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. |
| I-276 | 33 mi (53 km) | Interstate 276 begins at Exit 326 in King of Prussia, Montgomery County, and ends in Bristol crossing into New Jersey via the Delaware River Turnpike Bridge. I-276 is notable for ending at the middle of the bridge on the PA/NJ State Line, but will be truncated to I-95/future I-195 interchange with the Pennsylvania Turnpike. |
| I-376 | 85 mi (137 km) | 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 US 22 (the William Penn Highway) east of PA 60 and with US 30 (the Lincoln Highway) from PA 60 to Wilkinsburg. |
| I-476 | 131 mi (211 km) | 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. |
| I-576 (Future) | 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. | |
| I-676 | 2 mi (3.2 km) | 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. |
| I-279 | 13 mi (21 km) | 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. |
| I-579 | 2 mi (3.2 km) | The Crosstown Boulevard is a short Interstate in Pittsburgh. It connects the Boulevard of the Allies (PA 885) to I-279 at exit 8A. |
| I-180 | 29 mi (47 km) | 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. |
| I-380 | 25 mi (40 km) | 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. |
| I-283 | 3 mi (4.8 km) | 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. |
| I-195 (Future) | Interstate 195 will begin at the I-95/I-276/PA Turnpike interchange (currently under construction) and will utilize the existing I-95 right-of-way between the interchange and the Scudder Falls Bridge to New Jersey. |
Read more about this topic: List Of Interstate Highways In Pennsylvania
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