Interstate 180 (Pennsylvania)

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Interstate 180

I-180 highlighted in red
Route information
Auxiliary route of I-80
Maintained by PennDOT
Length28.84 mi[1] (46.41 km)
ExistedJanuary 1984[2]–present
NHSEntire route
Major junctions
West end Future I-99 / US 15 / US 220 in Williamsport
Major intersections US 15 in Williamsport

PA 87 in Montoursville
US 220 near Pennsdale

PA 405 near Muncy
East end I-80 / PA 147 near Milton
CountryUnited States
CountiesLycoming, Northumberland
Highway system
PA 179 PA 180

Interstate 180 (I-180) is a spur highway in Pennsylvania that connects Williamsport to I-80 near Milton. The length of the highway is 28.84 miles (46.41 km). It was also the designation of present-day I-176 between Morgantown 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 (US 15) and US 220. The highway begins running concurrently along these routes.

I-180 westbound just west of PA 54 in Delaware Township

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 at an interchange with I-80, and the freeway continues as Pennsylvania Route 147 (PA 147).


I-180 was designated in January 1984 and was signed concurrently with US 220 between US 15 in Williamsport and Pennsdale and replaced PA 147 between US 220 in Pennsdale and I-80 near Milton.[2]

Exit list


Future I-99 south / US 220 south to I-80 – Lock Haven
Continuation beyond western terminus

Future I-99 north / US 15 north – Mansfield
West end of concurrency with US 15
27.944.928Maynard StreetAccess to Pennsylvania College of Technology
27.744.627BHepburn Street / Via BellaEastbound exit and westbound entrance; access to Lycoming College and Peter J. McGovern Little League Museum
US 15 south (Market Street) – Lewisburg
East end of concurrency with US 15; single-point urban interchange
26.542.626Basin Street / Via BellaWestbound exit and eastbound entrance; access to Lycoming College and Peter J. McGovern Little League Museum
24.038.623 Third Street / Warrensville Road – Warrensville, MontoursvilleSigned as exits 23B (Warrensville Road) and 23A (Third Street) eastbound; access to Williamsport Regional Airport
PA 87 north / Loyalsock Avenue
PA 87 begins north, Loyalsock Avenue south; access to Williamsport Regional Airport
20.432.820Fairfield Road
Muncy Township16.927.217Lycoming Mall Road
US 220 north – Halls, Pennsdale
East end of US 220 concurrency
Muncy Creek Township12.820.613 PA 405 – Muncy, Hughesville
10.617.110Main StreetWestbound exit and eastbound entrance
NorthumberlandDelaware Township5.69.05 PA 54 – Turbotville
1.11.81McEwensville, Watsontown
Turbot Township00.0 I-80 – Bellefonte, BloomsburgI-80 exit 212

PA 147 south – Milton
Continuation beyond eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved July 3, 2022.
  2. ^ a b "Section of Rt. 147 Becomes Rt. 180". The Daily Item. Sunbury, Pennsylvania. January 5, 1984. p. 9. Retrieved April 18, 2019 – via
  3. ^ Google (25 November 2017). "Interstate 180 (Pennsylvania)" (Map). Google Maps. Google. Retrieved 25 November 2017.

External links