Interstate 81 (Pennsylvania)
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| American Legion Memorial Highway | ||||
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| Route information | ||||
| Maintained by PennDOT | ||||
| Length: | 232.63 mi (374.38 km) | |||
| Major junctions | ||||
| South end: |
 I-81 at the Maryland state line near Greencastle
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 US 30 in Chambersburg   US 11 to I-76 / Penna Turnpike in Carlisle PA 581 near Camp Hill  US 22 / US 322 in Harrisburg I-83 / US 322 in Colonial Park I-78 in Lickdale I-80 near Hazleton PA 309 in Wilkes-Barre   I-84 / I-380 / US 6 near Scranton I-476 / US 6 / US 11 / Penna Turnpike NE Extension near Scranton
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| North end: |
I-81 at the New York state line near Hallstead
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| Location | ||||
| Counties: | Franklin, Cumberland, Dauphin, Lebanon, Schuylkill, Luzerne, Lackawanna, Susquehanna | |||
| Highway system | ||||
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Interstate 81 is an 854.89-mile-long (1,375.81 km) north–south Interstate Highway, stretching from Dandridge, Tennessee to Fisher's Landing, New York at the United States/Canadian border. In the state of Pennsylvania, I-81 runs for 232.63 miles (374.38 km) from the Maryland state line near Greencastle to the New York state line near Hallstead and is called the American Legion Memorial Highway.
I-81 enters Pennsylvania at the Maryland state line about 13 miles (21 km) south of Chambersburg. In Chambersburg at mile marker 16, it meets with a major highway; U.S. Route 30 (the Chambersburg Pike to Gettysburg). About a mile north of Carlisle at exit 52, it meets with U.S. Route 11, which takes passengers to the Pennsylvania Turnpike/ Interstate 76, since I-81 has no direct interchange with I-76. The stretch of US 11 connecting I-81 to I-76 is known locally as the "Miracle Mile" since it contains plenty of traveler services including restaurants, gas stations, lodging, truck stops, shops, etc. From here, I-81 travels in an almost precisely east–west direction for the next 37 miles (until exit 89). At mile marker 59, it has an interchange with the western terminus of Pennsylvania Route 581. I-81 becomes the Capital Beltway from exit 59 to exit 70. As passengers approach exit 67, a major complex interchange is seen. The interchange consists of U.S. Route 22 and U.S. Route 322; U.S. Route 322 merges with Interstate 81. Exit 70 is the eastern terminus of the US 322 concurrency and the northern terminus of Interstate 83, and is located in Colonial Park. For the entire segment between the Mason–Dixon line and Interstate 78, I-81 runs through the Great Valley. North of Harrisburg between Interstate 83/U.S. Route 322 and Interstate 78, the highway passes near Hershey and Fort Indiantown Gap.
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