Interstate 180 is a spur highway that connects Williamsport, Pennsylvania

Williamsport, Pennsylvania

Williamsport is a city in and the county seat of Lycoming County, Pennsylvania in the United States. In 2009, the population was estimated at 29,304...

 to Interstate 80 near Milton, Pennsylvania

Milton, Pennsylvania

Milton is a borough in Northumberland County, Pennsylvania, on the Susquehanna River, north of Harrisburg. Settled in 1770, it was incorporated in 1817, and is governed by a charter that was revised in 1890...

. The length of the highway is 28.85 miles (46.4 km). It was also the designation of present-day Interstate 176

Interstate 176

Interstate 176 is a spur route of eastern Interstate 76 in Pennsylvania. I-176, known locally as the "Morgantown Expressway", travels from Morgantown, Pennsylvania to Reading, Pennsylvania; the entire length of the highway is just over...

 between Morgantown, Pennsylvania

Morgantown, Pennsylvania

Morgantown is a populated place in Caernarvon Township, Berks County, Pennsylvania, United States with a zip code of 19543. It is at an elevation of 597 ft at 40° 9' 18"N and 75°53' 23"W.-General History:...

 and Reading

Reading, Pennsylvania

Reading is a city in southeastern Pennsylvania, USA, and seat of Berks County. Reading is the principal city of the Greater Reading Area and had a population of 88,082 as of the 2010 census, making it the fifth most populated city in the state after Philadelphia, Pittsburgh, Allentown and Erie,...

, when the Pennsylvania Turnpike

Pennsylvania Turnpike

The Pennsylvania Turnpike is a toll highway system operated by the Pennsylvania Turnpike Commission in the Commonwealth of Pennsylvania, United States. The three sections of the turnpike system total . The main section extends from Ohio to New Jersey and is long...

 carried the "I-80S" designation in the 1960s. It is signed as an east–west route for its entire length, even though half of the route runs north–south.

Route description

I-180 begins along the banks of the West Branch Susquehanna River

West Branch Susquehanna River

The West Branch Susquehanna River is one of the two principal branches, along with the North Branch, of the Susquehanna River in the northeastern United States. The North Branch, which rises in upstate New York, is generally regarded as the extension of the main branch, with the shorter West Branch...

 in Williamsport

Williamsport, Pennsylvania

Williamsport is a city in and the county seat of Lycoming County, Pennsylvania in the United States. In 2009, the population was estimated at 29,304...

, at an interchange with U.S. Route 15 and U.S. Route 220. The highway begins its signage, concurrent along these routes.

At exit 27A, US 15 leaves the overlap running south across the Carl E. Stotz Memorial Little League Bridge and I-180 continues eastward, still concurrent with US 220 northbound. From there, I-180 runs along the West Branch Susquehanna River until the highway reaches the eastern suburbs of Williamsport, where US 220 leaves the Interstate via exit 15.

From US 220 to the eastern terminus, I-180 is aligned north–south, though the highway is signed east–west. I-180 terminates interchanging Interstate 80

Interstate 80

Interstate 80 is the second-longest Interstate Highway in the United States, following Interstate 90. It is a transcontinental artery running from downtown San Francisco, California to Teaneck, New Jersey in the New York City Metropolitan Area...

 and the freeway continues as Pennsylvania Route 147

Pennsylvania Route 147

Pennsylvania Route 147 is a north–south route that runs for along the east shore of the Susquehanna River in central Pennsylvania, United States. The northern terminus is at an interchange with Interstate 80 and Interstate 180 in Turbot Township. The southern terminus is at an interchange...

.

Exit list

County	Location	Mile	Exit Exit number An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....	Destinations	Notes
Lycoming Lycoming County, Pennsylvania -Appalachian Mountains and Allegheny Plateau:Lycoming County is divided between the Appalachian Mountains in the south, the dissected Allegheny Plateau in the north and east, and the valley of the West Branch Susquehanna River between these.-West Branch Susquehanna River:The West Branch of the...	Williamsport Williamsport, Pennsylvania Williamsport is a city in and the county seat of Lycoming County, Pennsylvania in the United States. In 2009, the population was estimated at 29,304...		29	N — Mansfield	Freeway continues as US 220 U.S. Route 220 U.S. Route 220 is a long U.S. Route in the eastern United States.US 220 is a spur route of U.S. Route 20 but at present, the two routes do not intersect nor do they connect via other spurs of US 20. The former U. S. Route 120, which was signed in Pennsylvania between 1926 and 1967, intersected...  south for 5 miles (8 km) west
			28	Maynard Street	Pennsylvania College of Technology Pennsylvania College of Technology Pennsylvania College of Technology, or Penn College, is a public college located in Williamsport, Pennsylvania, affiliated with The Pennsylvania State University. As an applied technology college, the school offers certificate, associate and baccalaureate degree programs in more than 100 fields of...
			27B	Via Bella, Hepburn Street	Exit eastbound only, entrance westbound only
			27A	S — Lewisburg Lewisburg, Pennsylvania Lewisburg is a borough in Union County, Pennsylvania, United States, south by southeast of Williamsport and north of Harrisburg. In the past, it was the commercial center for a fertile grain and general farming region. The population was 5,620 at the 2000 census. It is the county seat of Union... Market Street	Single-point urban interchange Single-point urban interchange A single-point urban interchange , also called a single-point interchange or single-point diamond interchange , is a type of highway interchange...
			26	Via Bella, Basin Street	Exit westbound only, entrance eastbound only
	Loyalsock		25	Commerce Park, Faxon
			23A	Warrensville, Montoursville Montoursville, Pennsylvania Montoursville is a borough in Lycoming County, Pennsylvania, in the United States. As of the 2000 census, the borough population was 4,777. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. It was named for Madame Montour, a Native American leader and skilled interpreter...	Eastbound only
			23B	East Third Street	Eastbound, Williamsport Regional Airport Williamsport Regional Airport Williamsport Regional Airport is a public towered airport located east of the central business district of Williamsport, a city in Lycoming County, Pennsylvania, USA...
			23	East Third Street, Warrensville	Westbound only, supplementary west-on from Broad Street
	Montoursville Montoursville, Pennsylvania Montoursville is a borough in Lycoming County, Pennsylvania, in the United States. As of the 2000 census, the borough population was 4,777. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. It was named for Madame Montour, a Native American leader and skilled interpreter...		21		PA 87 begins north, Loyalsock Avenue south
			20	Fairfield Road
	Muncy Township Muncy Township, Pennsylvania Muncy Township is a township in Lycoming County, Pennsylvania, in the United States. The population was 1,059 at the 2000 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area.The unincorporated village of Pennsdale is located here...		17	Lycoming Mall Road
			15
	Muncy Creek Township Muncy Creek Township, Pennsylvania Muncy Creek Township is a township in Lycoming County, Pennsylvania, in the United States. The population was 3,487 at the 2000 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area. The unincorporated village of Clarkstown is located in Muncy Creek...		13
			10	South Main Street	Exit westbound only, entrance eastbound only
Northumberland Northumberland County, Pennsylvania There were 38,835 households out of which 27.30% had children under the age of 18 living with them, 52.40% were married couples living together, 9.60% had a female householder with no husband present, and 34.10% were non-families. 30.20% of all households were made up of individuals and 15.50% had...	Delaware Township Delaware Township, Northumberland County, Pennsylvania Delaware Township is a township in Northumberland County, Pennsylvania, United States. The population was 4,341 at the 2000 census.-Geography:...		5
			1	McEwensville McEwensville, Pennsylvania McEwensville is a borough in Northumberland County, Pennsylvania, United States. The population was 314 at the 2000 census.-Geography:McEwensville is located at .... , Watsontown
	Turbot Township				Freeway continues as PA 147 south for 7 miles (11.3 km)