| State: | PA |
| Type: | PA |
| Route: | 18 |
| Length Mi: | 205 |
| Length Ref: | [1] |
| Length Round: | 0 |
| Map Custom: | yes |
| Map Notes: | Route of PA 18 highlighted in red |
| Tourist: | Crawford Lakelands Scenic Byway |
| Direction A: | South |
| Terminus A: | near Garrison |
| Junction: | in Washington near Washington near Frankfort Springs near Harshaville near Monaca in Big Beaver near West Middlesex near West Middlesex near Platea near Girard |
| Direction B: | North |
| Terminus B: | in Lake City |
| Counties: | Greene, Washington, Beaver, Lawrence, Mercer, Crawford, Erie |
| Previous Type: | PA |
| Previous Route: | 17 |
| Next Type: | US |
| Next Route: | 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 205miles, 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.
Traveling northward from West Virginia Route 69 at the West Virginia state line, Route 18 winds through rural Greene County, passing through the villages of Garrison, New Freeport, Nettle Hill, White Cottage, Woodruff, and Holbrook, before making its first junction with another state highway, PA Route 21, just west of the village of Rogersville and over 15miles from the state line. Here the two routes overlap for nearly 6miles, winding east-northeast through Rogersville and the village of East View, crossing the South Fork of Ten Mile Creek numerous times before reaching the village of West Waynesburg. At this point, Route 18 leaves the concurrency and turns northwest, traveling 12miles to the county line, following along Browns Creek, and passing through the villages of Rees Mill, Sycamore, and Nineveh.
Route 18 enters Washington County, and intersects with the eastern terminus of PA Route 231 and turns to the northeast and traveling over 5miles, passing near the villages of Old Concord and Sparta. Next, the route meets PA Route 221, and the two overlap for just over a mile, heading northwest through the village of Prosperity. After the village, Route 18 leaves the concurrency and heads northward through the villages of Van Buren, Lagonda, and Gabby Heights as it approaches the city of Washington nearly 10miles later. In Washington, Route 18 briefly overlaps with US 40, and the routes head west, intersect with the western terminus of PA Route 136, and then turn northwest. US 40 then leaves the concurrency, and nearly a mile later, Route 18 interchanges with I-70, connecting via city streets to the entrance and exit ramps. Before departing the city, 0.4miles later, the route intersects with the eastern terminus of PA Route 844, turns northward, and passes through the village of Oak Grove. Route 18 passes through the village of Gretna 8.5miles later and then overlaps with PA Route 50 for 0.5miles a couple miles west of the village of Hickory before continuing north-northwest. The route then passes by the village of Atlasburg and through the village of Slovan before reaching the borough of Burgettstown 7.5miles later. Route 18 meets US 22 nearly 4miles north of the borough, and then passes through the village of Florence at Old US 22 before reaching the county line just over 3miles later.
The route enters the borough of Frankfort Springs as it enters Beaver County, and meets the southern terminus of PA Route 168 at the north end of the borough. Passing through nearly 5miles of state park land, Route 18 eventually meets US 30 in the village of Harshaville. The route then junctions with PA Route 151 at the village of Mechanicsburg about 1.5miles later, and then passes through the village of McCleary. As Route 18 approaches the Ohio River, it turns east-northeast before its first interchange with I-376 about 2miles west of the borough of Monaca. The route enters the borough, turns north-northwest, crosses the Ohio River on the Rochester-Monaca Bridge, and enters the borough of Rochester. In Rochester, Route 18 intersects with the PA Route 51/PA Route 65 overlap, and then PA Route 68 before turning northwest, west, then north-northwest. It then merges with PA Route 65 along the east bank of the Beaver River. The concurrency enters the borough of New Brighton, where Route 18 then leaves the concurrency over 2miles later, crosses the Beaver River, enters the city of Beaver Falls, and continues northward almost 2miles. Route 18 briefly joins with PA Route 588, and then intersects with the southern terminus of PA Route 551 2miles later, just before leaving the city and entering the borough of Big Beaver. The route then passes through the borough of Homewood about 1.5miles later, and re-enters Big Beaver, where it interchanges with I-76 and The Pennsylvania Turnpike. Route 18 then passes through the borough of Koppel nearly 1.5miles later, where it intersects with PA Route 351, and then re-enters Big Beaver a third time before leaving Beaver County 1.3miles later.
As the route enters Lawrence County, it also enters the borough of New Beaver. Route 18 then turns northwestward, and passes through the borough of Wampum 2miles later, where it intersects with the western terminus of PA Route 288. The route re-enters New Beaver, then turns northward before its second intersection with PA Route 168 over 3.5miles later, near the village of Moravia. Route 18 enters the city of New Castle nearly 4miles later as it crosses the Mahoning River, and then meets PA Route 108. The two join and turn east, then northeast through the village of Mahoningtown, situated between the Mahoning and Shenango rivers. The concurrency then passes under US 422 about 0.8miles later before turning eastward and crossing the Shenango River. The concurrency then intersects 1.3miles later with PA Route 168, and the three routes overlap for 0.9miles, heading northward. Routes 108 and 168 then leave the concurrency, and Route 18 continues northward. The route is then joined with Business US 422 near downtown New Castle for nearly 0.5miles. Business US 422 then leaves westward and Route 18 continues northward out of the city. Route 18 passes through the village of Walmo, and then intersects 4miles north of New Castle with Mitchell Rd., which carries traffic to I-376 parallel to and west of Route 18. From here, PA 18 heads into a rural area of northern Lawrence County that is home to an Amish community.[2] Over 1.6miles later, the route intersects with the southern terminus of PA 158 south of the borough of New Wilmington, and 2.3miles later with PA 208 west of the borough just before exiting Lawrence County 0.5miles north of the intersection.
Upon entering Mercer County, the route winds northwesterly a few miles before turning west, where it has its second interchange with I-376 4.5miles later. Route 18 then turns northwesterly again, intersecting with the northern terminus of PA Route 551 0.4miles later, and enters the borough of West Middlesex a mile after that. Here, the route intersects with PA Route 318. Turning northward, the route then passes under I-80 and has an interchange with PA Route 760 immediately after (Route 18 traffic interchanges with I-80 via this PA Route 760 interchange). Route 18 then enters the city of Hermitage, intersects with the southern terminus of PA Route 518 a mile north of PA Route 760 at the village of Bobby's Corners, and continues about 2miles before intersecting with US 62 and then Business US 62 less than 0.3miles later. Over 1.5miles after that, the route intersects with the northern terminus of PA Route 518 at the village of Lamont's Corners east of the borough of Sharpsville before leaving Hermitage. The route enters the borough of Clark about 2.2miles later, where it intersects with the northern terminus of PA Route 258. Route 18 then crosses the Shenango River Reservoir, then passes near the villages of Transfer, Reynolds Heights, and Shenango before entering the borough of Greenville 8miles north of Clark. In Greenville, Route 18 intersects with the northern terminus of PA Route 846 just before its junction with PA Route 358. Here, the two routes overlap, heading eastward, and cross the Shenango River once again, before intersecting about 0.5miles later with PA Route 58, which joins the concurrency for about a quarter mile. Routes 18 and 58 then leave Route 358 and head northward. Less than a half mile later, Route 18 leaves the concurrency, turning northeastward, then northward, leaving Greenville. The Route continues through rural northern Mercer County about 4.5miles before passing through the village of Osgood, and leaves Mercer County less than a mile later.
After entering Crawford County, Route 18 then passes through the village of Adamsville about 2miles north of the county line, and, over 2.5miles later, enters the village of Hartstown, where it joins US 322, heading east-northeast. They travel over 5miles to the borough of Conneaut Lake, where they serve Conneaut Lake Park and join with US 6/PA Route 285, heading east. Route 285 leaves the concurrency one block later, and the remaining routes continue eastward out of the borough, nearly a mile later, where Route 18 then leaves the concurrency and heads northward. About 3.5miles north of the borough, Route 18 intersects with the northern terminus of PA Route 618 near Conneaut Lake Park, and then passes through the village of Harmonsburg. About 7.5miles later, the route is joined by PA Route 198, and the concurrency enters the borough of Conneautville. In the borough, Route 198 leaves the concurrency nearly 0.9miles later, and Route 18 continues northward, passing through the borough of Springboro just over 3miles north of Conneautville.
Over 3.5miles north of Springboro, the route crosses into Erie County, and enters the borough of Albion nearly 3miles later. Here, Route 18 joins US 6N eastward about 1.5miles, leaving the borough, where Route 18 turns northward. A mile later, the route passes through the borough of Cranesville, and then enters the borough of Platea about 3miles later, where it interchanges with I-90. Just over 2miles northward, Route 18 joins US 20 eastward into the borough of Girard for 1miles, before leaving the concurrency and turning northward. Upon exiting Girard, the route enters the borough of Lake City, where it terminates at PA Route 5 near the shore of Lake Erie.
| State: | PA |
| Type: | PA-Truck |
| Route: | 18 |
| Location: | Washington, Pennsylvania |
Pennsylvania Route 18 Truck is a truck route of PA 18 that is located near Washington, Pennsylvania.
The westbound exits and entrances of I-70 lead to a narrow street (called East Wylie Avenue) connecting to PA 18, thus making it harder for trucks to access PA 18. So, it follows I-70 west. It exits at exit 16, following Sheffield Street. Then, it creates a U-Turn back onto I-70 east and exits off PA 18.
| State: | PA |
| Type: | PA-Truck |
| Route: | 18 |
| Location: | New Castle, Pennsylvania |
| Formed: | 2013 |
| Deleted: | 2018 |
Pennsylvania Route 18 Truck was a truck route around a weight-restricted bridge over the Shenango River that existed from 2013 to about 2018. The bridge along Mahoning Avenue was prohibited to trucks over 30 tons, necessitating the route.[4] The route followed PA 108, I-376, US 422, and PA 168. In 2018, the bridge underwent rehabilitation, including the replacement of bearings, and substructure and steel repairs, among other fixes.[5] As a result, the route was deleted upon reconstruction.[6]
| State: | PA |
| Type: | PA-Bus |
| Route: | 18 |
| Location: | West Middlesex, Pennsylvania |
| Formed: | 1970 |
| Deleted: | 1978 |
Pennsylvania Route 18 Business was a business route of PA 18 that was established in 1970 when PA 18 was shifted onto the a part of the Beaver Valley Expressway from Exit 2 (PA 18) to the PA 760/PA 18 interchange near West Middlesex, Pennsylvania. PA 18 Business followed New Castle Road and Sharon Road through the town of West Middlesex. The route was removed in 1978 when mainline PA 18 was rerouted on its old alignment, removing the need for the business route.