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Interstate 180
I-180 highlighted in red
Route information
Auxiliary route of I-80
Maintained by PennDOT
Length	28.85 mi[1] (46.43 km)
Existed	1984–present
Major junctions
West end	Future I‑99 / US 15 / US 220 in Williamsport
	US 15 in Williamsport PA 87 in Montoursville US 220 near Pennsdale PA 405 near Muncy
East end	I-80 / PA 147 near Milton
Location
Counties	Lycoming, Northumberland
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Pennsylvania State Route System Interstate US State Scenic Byways Legislative ← PA 179 PA 180 →

Interstate 180 (I-180) is a spur highway that connects Williamsport, Pennsylvania to Interstate 80 near Milton, Pennsylvania. The length of the highway is 28.85 miles (46.43 km). It was also the designation of present-day Interstate 176 between Morgantown, Pennsylvania and Reading, when the Pennsylvania Turnpike 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

Looking west from the Carl E. Stotz Memorial Little League Bridge in Williamsport

I-180 begins along the banks of the West Branch Susquehanna River in Williamsport, 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 and the freeway continues as Pennsylvania Route 147.

History

Exit list

County	Location	mi[2]	km	Exit	Destinations	Notes
Lycoming	Williamsport			–	Future I‑99 south / US 220 south to I-80 – Lock Haven	Continuation beyond western terminus
		28.84	46.41	29	Future I‑99 north / US 15 north – Mansfield
		27.9	44.9	28	Maynard Street	Serves Pennsylvania College of Technology
		27.7	44.6	27B	Via Bella, Hepburn Street	Eastbound exit and westbound entrance
		26.8	43.1	27A	US 15 south (Market Street) – Lewisburg	Single-point urban interchange
		26.5	42.6	26	Via Bella, Basin Street	Westbound exit and eastbound entrance
	Loyalsock	25.3	40.7	25	Commerce Park, Faxon
		24.1	38.8	23B	Warrensville, Montoursville	Eastbound exit
		23.8	38.3	23A	East Third Street	Eastbound exit and entrance; Serves Williamsport Regional Airport
		23.7	38.1	23	East Third Street, Warrensville	Westbound exit; Supplemental westbound entrance from Broad Street
	Montoursville	21.7	34.9	21	PA 87 north (Loyalsock Avenue)	PA 87 begins north, Loyalsock Avenue south
		20.4	32.8	20	Fairfield Road
	Muncy Township	16.9	27.2	17	Lycoming Mall Road
		15.5	24.9	15	US 220 north – Halls, Pennsdale	East end of US 220 overlap
	Muncy Creek Township	12.8	20.6	13	PA 405 – Muncy, Hughesville
		10.6	17.1	10	South Main Street	Westbound exit and eastbound entrance
Northumberland	Delaware Township	5.6	9.0	5	PA 54 – Turbotville
		1.1	1.8	1	McEwensville, Watsontown
	Turbot Township	0	0.0		I-80 – Bellefonte, Bloomsburg	I-80 exit 212.
				–	PA 147 south – Milton	Continuation beyond eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

See also

• 
  U.S. Roads portal
  


• 
  Pennsylvania portal
  

References

Route map: