Pennsylvania Route 18

Pennsylvania Route 18 marker
Pennsylvania Route 18
Map
Route of PA 18 highlighted in red
Route information
Maintained by PennDOT
Length205 mi[1] (330 km)
Tourist
routes
Crawford Lakelands Scenic Byway
Major junctions
South end WV 69 near Garrison
Major intersections US 40 in Washington
I-70 near Washington
US 22 near Frankfort Springs
US 30 near Harshaville
I-376 near Monaca
I-76 / Penna Turnpike in Big Beaver
I-376 near West Middlesex
I-80 / I-376 / PA 760 near West Middlesex
I-90 near Platea
US 20 near Girard
North end PA 5 in Lake City
Location
CountryUnited States
StatePennsylvania
CountiesGreene, Washington, Beaver, Lawrence, Mercer, Crawford, Erie
Highway system
PA 17 US 19

Pennsylvania Route 18 (PA 18) is a major north–south highway in Western Pennsylvania whose southern terminus is at West Virginia Route 69 (WV 69) at the state line in Greene County near the village of Garrison, while the northern terminus is at PA 5 in Lake City. At a length of 205 miles (330 km), PA 18 is the only state route in Pennsylvania — north–south or east–west — to traverse the entire state. It also has the distinction of being the longest state route in Pennsylvania.

  1. ^ Calculated using DeLorme Street Atlas USA software