Pennsylvania Route 18
5259189
221452614
2008-06-24T15:42:32Z
Lazytiger
55348
bypassed Rand McNally redirect
{{Infobox road
|state=PA
|type=PA
|route=18
|length_mi=205
|length_ref=<ref name=sa>Calculated using DeLorme Street Atlas USA software</ref>
|length_round=0
|established=1928
|direction_a=South
|starting_terminus=[[Image:WV-69.svg|20px]] [[West Virginia Route 69|WV 69]] near Garrison
|junction=[[Image:I-70.svg|20px]] [[Interstate 70 (Pennsylvania)|I-70]] near [[Washington, Pennsylvania|Washington]]<br>[[Image:US 22.svg|20px]] [[U.S. Route 22 (Pennsylvania)|US 22]] near [[Frankfort Springs, Pennsylvania|Frankfort Springs]]<br>[[Image:PA-60.svg|20px]] [[Pennsylvania Route 60|PA 60]] near [[Monaca, Pennsylvania|Monaca]]<br>[[Image:I-76.svg|20px]][[Image:Pennsylvania Turnpike logo.svg|20px]] [[Interstate 76 (Pennsylvania)|I-76]]/[[Pennsylvania Turnpike|PA Tpk]] in [[Big Beaver, Pennsylvania|Big Beaver]]<br>[[Image:PA-60.svg|20px]] [[Pennsylvania Route 60|PA 60]] near [[West Middlesex, Pennsylvania|West Middlesex]]<br>[[Image:no image wide.svg|20px]][[Image:To plate blue.svg|20px]]<br>[[Image:PA-60.svg|20px]][[Image:I-80.svg|20px]] [[Pennsylvania Route 60|PA 60]]/[[Interstate 80 (Pennsylvania)|I-80]] near [[West Middlesex, Pennsylvania|W. Middlesex]]<br>[[Image:I-90.svg|20px]] [[Interstate 90 (Pennsylvania)|I-90]] near [[Platea, Pennsylvania|Platea]]
|direction_b=North
|ending_terminus= [[Image:PA-5.svg|20px]] [[Pennsylvania Route 5|PA 5]] in [[Lake City, Pennsylvania|Lake City]]
|counties=[[Greene County, Pennsylvania|Greene]], [[Washington County, Pennsylvania|Washington]], [[Beaver County, Pennsylvania|Beaver]], [[Lawrence County, Pennsylvania|Lawrence]], [[Mercer County, Pennsylvania|Mercer]], [[Crawford County, Pennsylvania|Crawford]], [[Erie County, Pennsylvania|Erie]]
|previous_type=PA
|previous_route=17
|next_type=US
|next_route=19
}}
'''Pennsylvania Route 18''' is a major north-south highway in [[Western Pennsylvania]] whose southern terminus is at the [[West Virginia]] state line in [[Greene County, Pennsylvania]] near the village of Garrison, while the northern terminus is at [[PA Route 5]] in [[Lake City, Pennsylvania]]. At a length of 205 miles, PA Route 18 is one of the few state routes in [[Pennsylvania]] – north-south ''and'' east-west – to go across the entire length of the state. It also has the distinction of being one of the longest state route in Pennsylvania.
==Route description==
===Greene County===
Traveling northward from the [[West Virginia]] state line, Route 18 winds through rural [[Greene County, Pennsylvania|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, [[Pennsylvania Route 21|PA Route 21]], just west of the village of Rogersville and over 15 miles from the state line. Here the two routes overlap for nearly 6 miles, 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 12 miles to the county line, following along Browns Creek, and passing through the villages of Rees Mill, Sycamore, and Nineveh.
===Washington County===
Route 18 enters [[Washington County, Pennsylvania|Washington County]], and intersects with the eastern terminus of [[Pennsylvania Route 231|PA Route 231]] and turns to the northeast and traveling over 5 miles, passing near the villages of Old Concord and Sparta. Next, the route meets [[Pennsylvania Route 221|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, Pennsylvania|Washington]] nearly 10 miles later. In Washington, Route 18 briefly overlaps with [[U.S. Route 40|US 40]], and the routes head west, intersect with the western terminus of [[Pennsylvania Route 138|PA Route 138]], and then turn northwest. US 40 then leaves the concurrency, and nearly a mile later, Route 18 interchanges with [[Interstate 70 (Pennsylvania)|I-70]], connecting via city streets to the entrance and exit ramps. Before departing the city, 0.4 miles later, the route intersects with the eastern terminus of [[Pennsylvania Route 884|PA Route 884]], turns northward, and passes through the village of Oak Grove. Route 18 passes through the village of Gretna 8.5 miles later and then overlaps with [[Pennsylvania Route 50|PA Route 50]] for 0.5 miles 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, Pennsylvania|Burgettstown]] 7.5 miles later. Route 18 meets [[U.S. Route 22|US 22]] nearly 4 miles north of the borough, and then passes through the village of Florence at Old US 22 before reaching the county line just over 3 miles later.
===Beaver County===
[[Image:Rt18inBF.JPG|thumb|right|300px|Route 18 was recently rerouted around the campus of [[Geneva College]] in [[Beaver Falls, Pennsylvania|Beaver Falls]]. Shown is a new intersection constructed in front of the campus.]]
The route enters the borough of [[Frankfort Springs, Pennsylvania|Frankfort Springs]] as it enters [[Beaver County, Pennsylvania|Beaver County]], and meets the southern terminus of [[Pennsylvania Route 168|PA Route 168]] at the north end of the borough. Passing through nearly 5 miles of state park land, Route 18 eventually meets [[U.S. Route 30|US 30]] in the village of Harshaville. The route then junctions with [[Pennsylvania Route 151|PA Route 151]] at the village of Mechanicsburg about 1.5 miles 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 [[Pennsylvania Route 60|PA Route 60]] about 2 miles west of the borough of [[Monaca, Pennsylvania|Monaca]]. The route enters the borough, turns north-northwest, crosses the Ohio River on the Rochester-Monaca Bridge, and enters the borough of [[Rochester, Pennsylvania|Rochester]]. In Rochester, Route 18 intersects with the [[Pennsylvania Route 51|PA Route 51]]/[[Pennsylvania Route 65|PA Route 65]] overlap, and then [[Pennsylvania Route 68|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, Pennsylvania|New Brighton]], where Route 18 then leaves the concurrency over 2 miles later, crosses the [[Beaver River (Pennsylvania)|Beaver River]], enters the city of [[Beaver Falls, Pennsylvania|Beaver Falls]], and continues northward almost 2 miles. Route 18 briefly joins with [[Pennsylvania Route 588|PA Route 588]], and then intersects with the southern terminus of [[Pennsylvania Route 551|PA Route 551]] 2 miles later, just before leaving the city and entering the borough of [[Big Beaver, Pennsylvania|Big Beaver]]. The route then passes through the borough of [[Homewood, Pennsylvania|Homewood]] about 1.5 miles later, and re-enters Big Beaver, where it interchanges with [[Interstate 76 (Pennsylvania)|I-76]] and The [[Pennsylvania Turnpike]]. Route 18 then passes through the borough of [[Koppel, Pennsylvania|Koppel]] nearly 1.5 miles later, where it intersects with [[Pennsylvania Route 351|PA Route 351]], and then re-enters Big Beaver a third time before leaving Beaver County 1.3 miles later.
===Lawrence County===
{|class="infobox" width="230px"
!style="background: #ccf;"|<big>Communities</big><ref name="rmmap">[[Rand McNally]] Motor Carriers Atlas 2007 Deluxe Edition: Page 89</ref>
|-
|
*[[Washington, Pennsylvania|Washington]]
*[[Burgettstown, Pennsylvania|Burgettstown]]
*[[Frankfort Springs, Pennsylvania|Frankfort Springs]]
*[[Monaca, Pennsylvania|Monaca]]
*[[Rochester, Pennsylvania|Rochester]]
*[[New Brighton, Pennsylvania|New Brighton]]
*[[Beaver Falls, Pennsylvania|Beaver Falls]]
*[[Big Beaver, Pennsylvania|Big Beaver]]
*[[Homewood, Pennsylvania|Homewood]]
*[[Koppel, Pennsylvania|Koppel]]
*[[New Beaver, Pennsylvania|New Beaver]]
*[[Wampum, Pennsylvania|Wampum]]
*[[New Castle, Pennsylvania|New Castle]]
*[[West Middlesex, Pennsylvania|West Middlesex]]
*[[Hermitage, Pennsylvania|Hermitage]]
*[[Clark, Pennsylvania|Clark]]
*[[Greenville, Pennsylvania|Greenville]]
*[[Conneaut Lake, Pennsylvania|Conneaut Lake]]
*[[Conneautville, Pennsylvania|Conneautville]]
*[[Springboro, Pennsylvania|Springboro]]
*[[Albion, Pennsylvania|Albion]]
*[[Cranesville, Pennsylvania|Cranesville]]
*[[Platea, Pennsylvania|Platea]]
*[[Girard, Pennsylvania|Girard]]
*[[Lake City, Pennsylvania|Lake City]]
|}
As the route enters [[Lawrence County, Pennsylvania|Lawrence County]], it also enters the borough of [[New Beaver, Pennsylvania|New Beaver]]. Route 18 then turns northwestward, and passes through the borough of [[Wampum, Pennsylvania|Wampum]] 2 miles later, where it intersects with the western terminus of [[Pennsylvania Route 288|PA Route 288]]. The route re-enters New Beaver, then turns northward before its second intersection with [[Pennsylvania Route 168|PA Route 168]] over 3.5 miles later, near the village of Moravia. Route 18 enters the city of [[New Castle, Pennsylvania|New Castle]] nearly 4 miles later as it crosses the [[Mahoning River]], and then meets [[Pennsylvania Route 108|PA Route 108]]. The two join and turn east, then northeast through the village of Mahoningtown, situated between the Mahoning and [[Shenango River|Shenango]] rivers. The concurrency then passes under [[U.S. Route 422 (Pennsylvania)|US 422]] about 0.8 miles later before turning eastward and crossing the Shenango River. The concurrency then intersects 1.3 miles later with PA Route 168, and the three routes overlap for 0.9 miles, heading northward. Routes 108 and 168 then leave the concurrency, and Route 18 continues northward. The route is then joined with [[U.S. Route 422 Business (New Castle, Pennsylvania)|Business US 422]] near downtown New Castle for nearly 0.5 miles. 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 4 miles north of New Castle with Mitchell Rd., which carries traffic to [[Pennsylvania Route 60|PA 60]] parallel to and west of Route 18. Over 1.6 miles later, the route intersects with the southern terminus of [[Pennsylvania Route 158|PA 158]] south of the borough of [[New Wilmington, Pennsylvania|New Wilmington]], and 2.3 miles later with [[Pennsylvania Route 208|PA 208]] west of the borough just before exiting Lawrence County 0.5 miles north of the intersection.
===Mercer County===
Upon entering [[Mercer County, Pennsylvania|Mercer County]], the route winds northwesterly a few miles before turning west, where it has its second interchange with PA Route 60 4.5 miles later. Route 18 then turns northwesterly again, intersecting with the northern terminus of [[Pennsylvania Route 551|PA Route 551]] 0.4 miles later, and enters the borough of [[West Middlesex, Pennsylvania|West Middlesex]] a mile after that. Here, the route intersects with [[Pennsylvania Route 318|PA Route 318]]. Turning northward, the route then passes under [[Interstate 80 (Pennsylvania)|I-80]] and has its third and final interchange with PA Route 60 immediately after (Route 18 traffic interchanges with I-80 via this PA Route 60 interchange). Route 18 then enters the city of [[Hermitage, Pennsylvania|Hermitage]], intersects with the southern terminus of [[Pennsylvania Route 518|PA Route 518]] a mile north of PA Route 60 at the village of Bobby’s Corners, and continues about 2 miles before intersecting with [[U.S. Route 62|US 62]] and then [[U.S. Highway 62 Business (Sharon, Pennsylvania)|Business US 62]] less than 0.3 miles later. Over 1.5 miles 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, Pennsylvania|Sharpsville]] before leaving Hermitage. The route enters the borough of [[Clark, Pennsylvania|Clark]] about 2.2 miles later, where it intersects with the northern terminus of [[Pennsylvania Route 258|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, Pennsylvania|Greenville]] 8 miles north of Clark. In Greenville, Route 18 intersects with the northern terminus of [[Pennsylvania Route 846|PA Route 846]] just before its junction with [[Pennsylvania Route 358|PA Route 358]]. Here, the two routes overlap, heading eastward, and cross the [[Shenango River]] once again, before intersecting about 0.5 miles later with [[Pennsylvania Route 58|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 4.5 miles before passing through the village of Osgood, and leaves Mercer County less than a mile later.
===Crawford County===
After entering [[Crawford County, Pennsylvania|Crawford County]], Route 18 then passes through the village of Adamsville about 2 miles north of the county line, and, over 2.5 miles later, enters the village of Hartstown, where it joins [[U.S. Route 322|US 322]], heading east-northeast. They travel over 5 miles to the borough of [[Conneaut Lake, Pennsylvania|Conneaut Lake]], where they join with [[U.S. Route 6|US 6]]/[[Pennsylvania Route 285|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 3.5 miles north of the borough, Route 18 intersects with the northern terminus of [[Pennsylvania Route 618|PA Route 618]] near [[Conneaut Lake Park]], and then passes through the village of Harmonsburg. About 7.5 miles later, the route is joined by [[Pennsylvania Route 198|PA Route 198]], and the concurrency enters the borough of [[Conneautville, Pennsylvania|Conneautville]]. In the borough, Route 198 leaves the concurrency nearly 0.9 miles later, and Route 18 continues northward, passing through the borough of [[Springboro, Pennsylvania|Springboro]] just over 3 miles north of Conneautville.
===Erie County===
Over 3.5 miles north of Springboro, the route crosses into [[Erie County, Pennsylvania|Erie County]], and enters the borough of [[Albion, Pennsylvania|Albion]] nearly 3 miles later. Here, Route 18 joins [[U.S. Route 6N (Pennsylvania)|US 6N]] eastward about 1.5 miles, leaving the borough, where Route 18 turns northward. A mile later, the route passes through the borough of [[Cranesville, Pennsylvania|Cranesville]], and then enters the borough of [[Platea, Pennsylvania|Platea]] about 3 miles later, where it interchanges with [[Interstate 90 (Pennsylvania)|I-90]]. Just over 2 miles northward, Route 18 joins [[U.S. Route 20 (Pennsylvania)|US 20]] eastward into the borough of [[Girard, Pennsylvania|Girard]] for 1 mile, before leaving the concurrency and turning northward. Upon exiting Girard, the route enters the borough of [[Lake City, Pennsylvania|Lake City]], where it terminates at [[Pennsylvania Route 5|PA Route 5]] near the shore of [[Lake Erie]].
==Major intersections==
{{PAinttop}}
{{PAint
|county=Greene
|cspan=3
|location=Freeport Township
|mile=0.0
|road=[[Image:WV-69.svg|20px]] [[West Virginia Route 69|WV 69]]
|notes=[[West Virginia]] state line.
}}
{{PAint
|location_special=[[Center Township, Greene County, Pennsylvania|Center Township]]
|mile=15.7
|type=mplex
|road=[[Image:PA-21.svg|20px]] [[Pennsylvania Route 21|PA 21]]
|notes=Western terminus of concurrency.
}}
{{PAint
|location_special=[[Franklin Township, Greene County, Pennsylvania|Franklin Township]]
|mile=21.5
|type=mplex
|road=[[Image:PA-21.svg|20px]] [[Pennsylvania Route 21|PA 21]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|county=Washington
|cspan=12
|location=East Finley Township
|mile=33.6
|road=[[Image:PA-231.svg|25px]] [[Pennsylvania Route 231|PA 231]]
|notes=Eastern terminus of PA 231.
}}
{{PAint
|location_special=[[Morris Township, Washington County, Pennsylvania|Morris Township]]
|lspan=2
|mile=38.9
|type=mplex
|road=[[Image:PA-221.svg|25px]] [[Pennsylvania Route 221|PA 221]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|mile=40.1
|type=mplex
|road=[[Image:PA-221.svg|25px]] [[Pennsylvania Route 221|PA 221]]
|notes=Western terminus of concurrency.
}}
{{PAint
|location=Washington
|lspan=5
|mile=50.0
|type=mplex
|road=[[Image:US 40.svg|20px]] [[U.S. Route 40 (Pennsylvania)|US 40]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|mile=50.1
|road=[[Image:PA-136.svg|25px]] [[Pennsylvania Route 136|PA 136]]
|notes=Western terminus of PA 136.
}}
{{PAint
|mile=50.6
|type=mplex
|road=[[Image:US 40.svg|20px]] [[U.S. Route 40 (Pennsylvania)|US 40]]
|notes=Western terminus of concurrency.
}}
{{PAint
|mile=51.5
|road=[[Image:I-70.svg|20px]] [[Interstate 70 (Pennsylvania)|I-70]]
|notes=Exit 17 (I-70).
}}
{{PAint
|mile=51.9
|road=[[Image:PA-844.svg|25px]] [[Pennsylvania Route 844|PA 844]]
|notes=Eastern terminus of PA 844.
}}
{{PAint
|location_special=[[Mount Pleasant Township, Washington County, Pennsylvania|Mount Pleasant Township]]
|lspan=2
|mile=60.4
|type=mplex
|road=[[Image:PA-50.svg|20px]] [[Pennsylvania Route 50|PA 50]]
|notes=Western terminus of concurrency.
}}
{{PAint
|mile=60.9
|type=mplex
|road=[[Image:PA-50.svg|20px]] [[Pennsylvania Route 50|PA 50]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|location_special=[[Hanover Township, Washington County, Pennsylvania|Hanover Township]]
|lspan=2
|mile=72.3
|road=[[Image:US 22.svg|20px]] [[U.S. Route 22 (Pennsylvania)|US 22]]
}}
{{PAint
|mile=72.8
|type=decomd
|road=[[Image:US 22.svg|20px]] [[U.S. Route 22 (Pennsylvania)|US 22]]
|notes=Former alignment of US 22.
}}
{{PAint
|county=Beaver
|cspan=13
|location=Frankfort Springs
|mile=76.5
|road=[[Image:PA-168.svg|25px]] [[Pennsylvania Route 168|PA 168]]
|notes=Southern terminus of PA 168.
}}
{{PAint
|location_special=[[Hanover Township, Beaver County, Pennsylvania|Hanover Township]]
|mile=81.4
|road=[[Image:US 30.svg|20px]] [[U.S. Route 30 (Pennsylvania)|US 30]]
}}
{{PAint
|location=Raccoon Township
|mile=82.9
|road=[[Image:PA-151.svg|25px]] [[Pennsylvania Route 151|PA 151]]
}}
{{PAint
|location_special=[[Potter Township, Beaver County, Pennsylvania|Potter Township]]
|mile=93.3
|road=[[Image:PA-60.svg|20px]] [[Pennsylvania Route 60|PA 60]]
|notes=Exit 12 (PA 60).
}}
{{PAint
|location=Monaca
|mile=96.6
|road=[[Rochester-Monaca Bridge|Monaca-Rochester Bridge]]
|
}}
{{PAint
|location=Rochester
|lspan=2
|mile=96.8
|road=[[Image:PA-51.svg|20px]] [[Image:PA-65.svg|20px]]<br>[[Pennsylvania Route 51|PA 51]] - [[Pennsylvania Route 65|PA 65]]
|
}}
{{PAint
|mile=97.0
|road=[[Image:PA-68.svg|20px]] [[Pennsylvania Route 68|PA 68]]
}}
{{PAint
|location=Rochester Township
|mile=97.8
|type=mplex
|road=[[Image:PA-65.svg|20px]] [[Pennsylvania Route 65|PA 65]]
|notes=Northbound merging of routes/southern terminus of concurrency.
}}
{{PAint
|location=New Brighton
|mile=100.1
|type=mplex
|road=[[Image:PA-65.svg|20px]] [[Pennsylvania Route 65|PA 65]]
|notes=Northern terminus of concurrency.
}}
{{PAint
|location=Beaver Falls
|lspan=2
|mile=101.9
|road=[[Image:PA-588.svg|25px]] [[Pennsylvania Route 588|PA 588]]
|notes=Forms a concurrency for two blocks.
}}
{{PAint
|mile=103.9
|road=[[Image:PA-551.svg|25px]] [[Pennsylvania Route 551|PA 551]]
|notes=Southern terminus of PA 551.
}}
{{PAint
|location=Big Beaver
|mile=105.8
|road=[[Image:I-76.svg|20px]] [[Image:Pennsylvania Turnpike logo.svg|20px]]<br>[[Interstate 76 (Pennsylvania)|I-76]] - [[Pennsylvania Turnpike|PA Tpk.]]
|notes=Exit 13 (Beaver Valley) (Turnpike).
}}
{{PAint
|location=Koppel
|mile=107.3
|road=[[Image:PA-351.svg|25px]] [[Pennsylvania Route 351|PA 351]]
}}
{{PAint
|county=Lawrence
|cspan=13
|location=Wampum
|mile=110.6
|road=[[Image:PA-288.svg|25px]] [[Pennsylvania Route 288|PA 288]]
|notes=Western terminus of PA 288.
}}
{{PAint
|location=North Beaver Township
|mile=114.3
|road=[[Image:PA-168.svg|25px]] [[Pennsylvania Route 168|PA 168]]
}}
{{PAint
|location=New Castle
|lspan=8
|mile=117.8
|type=mplex
|road=[[Image:PA-108.svg|25px]] [[Pennsylvania Route 108|PA 108]]
|notes=Southern terminus of concurrency.
}}
{{PAint
|mile=118.6
|type=noaccess
|road=[[Image:US 422.svg|25px]] [[U.S. Route 422 (Pennsylvania)|US 422]]
|notes=PA 18/PA 108 concurrency passes under US 422.
}}
{{PAint
|mile=119.9
|type=mplex
|road=[[Image:PA-168.svg|25px]] [[Pennsylvania Route 168|PA 168]]
|notes=Southern terminus of concurrency.
}}
{{PAint
|mile=120.8
|type=mplex
|road=[[Image:PA-108.svg|25px]] [[Image:PA-168.svg|25px]]<br>[[Pennsylvania Route 108|PA 108]] / [[Pennsylvania Route 168|PA 168]]
|notes=Northern terminus of concurrency.
}}
{{PAint
|mile=120.9
|type=mplex
|road=[[Image:No image.svg|2px]][[Image:Business plate.svg|20px]]<br>[[Image:US 422.svg|25px]]<br>[[U.S. Route 422 Business (New Castle, Pennsylvania)|Bus. US 422]]
|notes=Southern terminus of concurrency.
}}
{{PAint
|mile=121.1
|type=decomd
|road=[[Image:US 422.svg|25px]] [[U.S. Route 422 (Pennsylvania)|US 422]]
|notes=Former alignment of US 422
}}
{{PAint
|mile=121.2
|type=mplex
|road=[[Image:No image.svg|2.5px]][[Image:Business plate.svg|20px]][[Image:No image.svg|2.5px]] [[Image:No image.svg|2.5px]]<br>[[Image:US 422.svg|25px]] [[Image:US 224.svg|25px]]<br>[[U.S. Route 422 Business (New Castle, Pennsylvania)|Bus. US 422]]/[[U.S. Route 224|U.S. 224]]
|notes=Northern terminus of concurrency, eastern terminus of [[U.S. Route 224]].<ref>http://www.transportation.org/sites/route/docs/Signed%20AASHTO%20Application%20for%20US%20224.pdf</ref>
}}
{{PAint
|mile=121.3
|type=decomd
|road=[[Image:US 224.svg|25px]] [[U.S. Route 224 (Pennsylvania)|US 224]]
|notes=Former eastern terminus of US 224.
}}
{{PAint
|location=Neshannock Township
|mile=125.7
|road=[[Image:To plate.svg|20px]]<br>[[Image:PA-60.svg|20px]]<br>[[Pennsylvania Route 60|PA 60]] (Mitchell Road)
}}
{{PAint
|location_special=[[Wilmington Township, Lawrence County, Pennsylvania|Wilmington Township]]
|lspan=2
|mile=127.3
|road=[[Image:PA-158.svg|25px]] [[Pennsylvania Route 158|PA 158]]
|
}}
{{PAint
|mile=129.6
|road=[[Image:PA-208.svg|25px]] [[Pennsylvania Route 208|PA 208]]
|
}}
{{PAint
|county=Mercer
|cspan=16
|location_special=[[Shenango Township, Mercer County, Pennsylvania|Shenango Township]]
|lspan=3
|mile=131.7
|type=decomd
|road=[[Image:PA-468.svg|25px]] [[Pennsylvania Route 468|PA 468]]
|notes=Decommissioned route.
}}
{{PAint
|mile=134.7
|road=[[Image:PA-60.svg|20px]] [[Pennsylvania Route 60|PA 60]]
|
}}
{{PAint
|mile=135.1
|road=[[Image:PA-551.svg|25px]] [[Pennsylvania Route 551|PA 551]]
|notes=Northern terminus of PA 551.
}}
{{PAint
|location=West Middlesex
|mile=136.2
|road=[[Image:PA-318.svg|25px]] [[Pennsylvania Route 318|PA 318]]
|town=West Middlesex
|
}}
{{PAint
|location_special=[[Shenango Township, Mercer County, Pennsylvania|Shenango Township]]
|lspan=2
|mile=136.9
|type=noaccess
|road=[[Image:I-80.svg|20px]] [[Interstate 80 (Pennsylvania)|I-80]]
|notes=PA 18 passes under I-80.
}}
{{PAint
|mile=137.1
|road=[[Image:no image wide.svg|20px]] [[Image:To plate blue.svg|20px]]<br>[[Image:PA-60.svg|20px]] [[Image:I-80.svg|20px]]<br>[[Pennsylvania Route 60|PA 60]]
|notes=Access to I-80 via PA 60.
}}
{{PAint
|location=Hermitage
|lspan=4
|mile=138.1
|road=[[Image:PA-518.svg|25px]] [[Pennsylvania Route 518|PA 518]]
|notes=Southern terminus of PA 518.
}}
{{PAint
|mile=140.1
|road=[[Image:US 62.svg|20px]] [[U.S. Route 62 (Pennsylvania)|US 62]]
}}
{{PAint
|mile=140.4
|road=[[Image:Business plate.svg|20px]]<br>[[Image:US 62.svg|20px]]<br>[[U.S. Route 62 Business (Sharon, Pennsylvania)|Bus. US 62]]
|notes=Former alignment of US 62.
}}
{{PAint
|mile=142.0
|road=[[Image:PA-518.svg|25px]] [[Pennsylvania Route 518|PA 518]]
|notes=Northern terminus of PA 518.
}}
{{PAint
|location=Clark
|mile=144.2
|road=[[Image:PA-258.svg|25px]] [[Pennsylvania Route 258|PA 258]]
|notes=Northern terminus of PA 258.
}}
{{PAint
|location=Greenville
|lspan=4
|mile=152.8
|road=[[Image:PA-846.svg|25px]] [[Pennsylvania Route 846|PA 846]]
|notes=Northern terminus of PA 846.
}}
{{PAint
|mile=152.9
|type=mplex
|road=[[Image:PA-358.svg|25px]] [[Pennsylvania Route 358|PA 358]]
|notes=Western terminus of concurrency.
}}
{{PAint
|mile=153.4
|type=mplex
|road=[[Image:PA-58.svg|20px]] [[Pennsylvania Route 58|PA 58]]
|notes=PA 58 joins concurrency.
}}
{{PAint
|mile=153.6
|type=mplex
|road=[[Image:PA-358.svg|25px]] [[Pennsylvania Route 358|PA 358]]
|notes=PA 358 leaves concurrency.
}}
{{PAint
|location_special=[[Hempfield Township, Mercer County, Pennsylvania|Hempfield Township]]
|mile=154.0
|type=mplex
|road=[[Image:PA-58.svg|20px]] [[Pennsylvania Route 58|PA 58]]
|town_special=north of [[Greenville, Pennsylvania|Greenville]]
|notes=Northern terminus of concurrency.
}}
{{PAint
|county=Crawford
|cspan=7
|location_special=[[West Fallowfield Township, Crawford County, Pennsylvania|Crawford County]]
|mile=164.1
|type=mplex
|road=[[Image:US 322.svg|25px]] [[U.S. Route 322 (Pennsylvania)|US 322]]
|notes=Western terminus of concurrency.
}}
{{PAint
|location=Conneaut Lake
|lspan=2
|mile=169.4
|type=mplex
|road=[[Image:US 6.svg|20px]] [[Image:PA-285.svg|25px]]<br>[[U.S. Route 6 (Pennsylvania)|US 6]] - [[Pennsylvania Route 285|PA 285]]
|notes=Western terminus of concurrency. US 322/PA 18 concurrency continues.
}}
{{PAint
|mile=169.5
|type=mplex
|road=[[Image:PA-285.svg|25px]] [[Pennsylvania Route 285|PA 285]]
|notes=Eastern terminus of concurrency. US 6/US 322/PA 18 concurrency continues.
}}
{{PAint
|location_special=[[Sadsbury Township, Crawford County, Pennsylvania|Sadsbury Township]]
|mile=170.4
|type=mplex
|road=[[Image:US 6.svg|20px]] [[Image:US 322.svg|25px]]<br>[[U.S. Route 6 (Pennsylvania)|US 6]] - [[U.S. Route 322 (Pennsylvania)|US 322]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|location_special=[[Summit Township, Crawford County, Pennsylvania|Summit Township]]
|mile=173.9
|road=[[Image:PA-618.svg|25px]] [[Pennsylvania Route 618|PA 618]]
|notes=Northern terminus of PA 618.
}}
{{PAint
|location_special=[[Summerhill Township, Crawford County, Pennsylvania|Summerhill Township]]
|mile=181.5
|type=mplex
|road=[[Image:PA-198.svg|25px]] [[Pennsylvania Route 198|PA 198]]
|notes=Southern terminus of concurrency.
}}
{{PAint
|location=Conneautville
|mile=182.3
|type=mplex
|road=[[Image:PA-198.svg|25px]] [[Pennsylvania Route 198|PA 198]]
|notes=Northern terminus of concurrency.
}}
{{PAint
|county=Erie
|cspan=6
|location=Albion
|mile=192.0
|type=mplex
|road=[[Image:US 6N.svg|20px]] [[U.S. Route 6N (Pennsylvania)|US 6N]]
|notes=Western terminus of concurrency.
}}
{{PAint
|location=Elk Creek Township
|mile=193.6
|type=mplex
|road=[[Image:US 6N.svg|20px]] [[U.S. Route 6N (Pennsylvania)|US 6N]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|location_special=[[Girard Township, Erie County, Pennsylvania|Girard Township]]
|lspan=2
|mile=199.2
|road=[[Image:I-90.svg|20px]] [[Interstate 90 (Pennsylvania)|I-90]]
|notes=Exit 9 (I-90).
}}
{{PAint
|mile=201.4
|type=mplex
|road=[[Image:US 20.svg|20px]] [[U.S. Route 20 (Pennsylvania)|US 20]]
|notes=Western terminus of concurrency.
}}
{{PAint
|location=Girard
|mile=202.4
|type=mplex
|road=[[Image:US 20.svg|20px]] [[U.S. Route 20 (Pennsylvania)|US 20]]
|notes=Eastern terminus of concurrency.
}}
{{PAint
|location=Lake City
|mile=205.0
|road=[[Image:PA-5.svg|20px]] [[Pennsylvania Route 5|PA 5]]
}}
{{PAintbtm}}
==Attractions==
*[[Conneaut Lake Park]]
==History==
*'''1927''' The route was signed from [[Beaver Falls, Pennsylvania|Beaver Falls]] to [[Erie, Pennsylvania|Erie]]
*'''1928''' Extended south from Beaver Falls to the [[West Virginia]] state line; also moved to its current alignment between [[Pennsylvania Route 158|PA 158]] and [[Greenville, Pennsylvania|Greenville]] from its previous alignment on current-day PA 158 near [[New Wilmington, Pennsylvania|New Wilmington]] to [[Mercer, Pennsylvania|Mercer]] and [[Pennsylvania Route 58|PA 58]] from Mercer to Greenville.
*'''1963''' Moved from Liberty St., Atlantic Ave., and Washington St. in [[New Castle, Pennsylvania|New Castle]] to its current alignment on Mahoning Ave. and Jefferson St.
*'''1970''' Widened from [[Pennsylvania 518|PA 518]] in [[Hermitage, Pennsylvania|Hermitage]] (north end near [[Sharpsville, Pennsylvania|Sharpsville]]) to [[Clark, Pennsylvania|Clark]], and median installed; also, designation moved to the [[Pennsylvania Route 60|PA 60]] expressway between the [[West Middlesex, Pennsylvania|West Middlesex]] interchange and the end of the Beaver Valley Expressway
*'''1971''' Widened and median installed from [[U.S. Route 62 (Pennsylvania)|US 62]] north to Highland Rd. in Hermitage (then Hickory Township)
*'''1972''' Widening completed from Clark to Shenango (village, near Greenville)
*'''1978''' Designation moved back to current alignment from the PA 60 / Beaver Valley Expressway designation of 1970; Business PA 18 designation through West Middlesex was eliminated
*'''1997''' Widened to 5 lanes from the north PA 60 interchange near West Middlesex to US 62 in Hermitage
*'''2002''' Widening completed from US 62 in Hermitage to PA 518 near Sharpsville<ref name=pah>[http://www.pahighways.com/state/PA1-50.html#PA18 Pennsylvania Highways - Pennsylvania Route 18]</ref>
*'''2008''' Rerouted away from Geneva College in Beaver Falls to make the campus more safe for students.
==See also==
===Spur routes===
*[[Pennsylvania Route 218|PA 218]] from the [[West Virginia]] state line in [[Greene County, Pennsylvania|Greene County]] to [[Waynesburg, Pennsylvania|Waynesburg]] (does not intersect with parent route)
*[[Pennsylvania Route 318|PA 318]] from the [[Ohio]] state line west of [[West Middlesex, Pennsylvania|West Middlesex]] to [[Mercer, Pennsylvania|Mercer]]
*[[Pennsylvania Route 418|PA 418]] from [[Wheatland, Pennsylvania|Wheatland]] to [[Hermitage, Pennsylvania|Hermitage]] (does not intersect with parent route)
*[[Pennsylvania Route 518|PA 518]] in Hermitage
*[[Pennsylvania Route 618|PA 618]] near [[Conneaut Lake, Pennsylvania|Conneaut Lake]]
*[[Pennsylvania Route 718|PA 718]] from west of West Middlesex to the Ohio state line north of [[Sharon, Pennsylvania|Sharon]] (does not intersect with parent route)
==References==
{{Reflist}}
==External links==
*[http://www.pahighways.com/state/PA1-50.html Pennsylvania Highways: PA 1 - 50]
*[http://www.state-ends.com/paends/state/18.html PA State Route 18 Ends]
[[Category:State highways in Pennsylvania|018]]