Driving on Interstate 81 in Pennsylvania from Harrisburg to Hazelton

At mile marker 89, I-81 meets the western terminus of I-78; I-78 picks up the eastward route through the Great Valley and heads toward Allentown and New York City, while I-81 turns back northward, cutting through the Blue Mountain at Swatara Gap. From mile marker 141 to mile marker 146; I-81 passes near the city of Hazleton. At exit 151, I-81 meets a major interstate; Interstate 80. As motorists enter Wilkes-Barre at mile marker 165, Interstate 81 merges with a major Pennsylvania route for 5 miles (8.0 km); Pennsylvania Route 309. At exit 175, I-81 meets with Pennsylvania Route 315, which will lead passengers to the Northeast Extension of the Pennsylvania Turnpike. In Scranton at mile marker 185, there is a short freeway called the Central Scranton Expressway which will lead passengers into downtown Scranton. At mile marker 187, I-81 is at the Throop Dunmore Interchange which consists of Interstate 84, Interstate 380, and U.S. Route 6. US 6 merges with I-81 for 7 miles (11 km) from mile marker 187 to mile marker 194. At mile marker 194, is the northern terminus of Interstate 476 which is the north east extension of the Pennsylvania Turnpike. The last exit in Pennsylvania is exit 230 which is Pennsylvania Route 171 near Hallstead. 4 miles (6.4 km) north of exit 230, passengers have entered the state of New York.