Editing Pennsylvania Turnpike (section)

===Original mainline===
After the Irwin interchange, the turnpike widens to six lanes and heads into rural areas west of [[Greensburg, Pennsylvania|Greensburg]]. Curving southeast, it reaches [[New Stanton, Pennsylvania|New Stanton]] and an interchange for [[Interstate 70 in Pennsylvania|I-70]], [[U.S. Route 119 in Pennsylvania|US&nbsp;119]], and the southern terminus of PA&nbsp;66 (Amos K. Hutchinson Bypass). The road returns to four lanes there, and I-70 is concurrent with I-76. After New Stanton it passes over the [[Southwest Pennsylvania Railroad]]'s Radebaugh Subdivision line and winds southeast to the exit for [[Pennsylvania Route 31|PA&nbsp;31]] in [[Donegal, Pennsylvania|Donegal]], which accesses [[Pennsylvania Route 711|PA&nbsp;711]].<ref name=patpmap/><ref name=gm/> East of Donegal, the turnpike crosses the [[Laurel Hill (Pennsylvania)|Laurel Hill]] cut, and soon after enters [[Somerset County, Pennsylvania|Somerset County]].<ref name=gm/><ref name=adc/>

It continues southeast to [[Somerset, Pennsylvania|Somerset]] and an interchange with [[Pennsylvania Route 601|PA&nbsp;601]] accessing [[U.S. Route 219 in Pennsylvania|US&nbsp;219]] and [[Johnstown, Pennsylvania|Johnstown]] before crossing CSX's [[S&C Subdivision]] rail line. East of Somerset, the highway passes north of the [[Somerset Wind Farm]] before reaching [[Allegheny Mountain (Pennsylvania)|Allegheny Mountain]]<ref name=patpmap/><ref name=gm/> and its [[Allegheny Mountain Tunnel|tunnel]].<ref name=ptc1981/><ref name=patpmap/><ref name=gm/> The turnpike then winds down the mountain at a three-percent grade (its steepest)<ref name=gm/><ref name=dakelman63/><ref name=dakelman29/> into [[Bedford County, Pennsylvania|Bedford County]] through a valley.<ref name=adc/> In [[Bedford, Pennsylvania|Bedford]], an exit for [[U.S. Route 220 Business (Bedford, Pennsylvania)|US&nbsp;220&nbsp;Business]] (US&nbsp;220&nbsp;Bus.) accesses [[U.S. Route 220 in Pennsylvania|US&nbsp;220]], the southern terminus of [[Interstate 99 in Pennsylvania|I-99]], and [[Altoona, Pennsylvania|Altoona]].<ref name=patpmap/><ref name=gm/>

[[File:Breezewood Exit.jpg|thumb|alt=Two lanes of a four-lane highway, with two overhead signs|Eastbound at the Breezewood interchange, where I-70 splits from I-76]]

It passes through [[The Narrows (Pennsylvania)|the Narrows]], a {{convert|650|ft|m|adj=mid|-wide}} gap in [[Evitts Mountain]] east of Bedford, with US&nbsp;30 and the [[Raystown Branch Juniata River]].<ref name=gm/><ref name=dakelman63>{{harvp|Dakelman|Schorr|2004|p=63|ps=.}}</ref> The turnpike winds through a valley south of the river before traversing Clear Ridge Cut near [[Everett, Pennsylvania|Everett]].<ref name=patpmap/><ref name=gm/><ref name=dakelman31>{{harvp|Dakelman|Schorr|2004|p=31|ps=.}}</ref> In [[Breezewood, Pennsylvania|Breezewood]], I-70 leaves the turnpike at an interchange with US&nbsp;30 with some of the only [[traffic light]]s on an interstate highway.<ref name=patpmap/><ref name=gm/>

The turnpike then heads northeast across [[Rays Hill]] into [[Fulton County, Pennsylvania|Fulton County]],<ref name=gm/><ref name=adc/> continuing east across [[Sideling Hill]] to an interchange with [[U.S. Route 522|US&nbsp;522]] in [[Fort Littleton, Pennsylvania|Fort Littleton]] and paralleling US&nbsp;522 before curving east into [[Huntingdon County, Pennsylvania|Huntingdon County]].<ref name=gm/><ref name=adc/> It goes under [[Tuscarora Mountain]] through a [[Tuscarora Mountain Tunnel|tunnel]] into [[Franklin County, Pennsylvania|Franklin County]],<ref name=ptc1981/><ref name=gm/><ref name=adc/> curving northeast into a valley to the [[Pennsylvania Route 75|PA&nbsp;75]] exit in [[Willow Hill, Pennsylvania|Willow Hill]].<ref name=patpmap/><ref name=gm/>

The road then passes under Kittatinny Mountain through the [[Kittatinny Mountain Tunnel]] before entering the [[Blue Mountain Tunnel|tunnel]] under [[Blue Mountain (Pennsylvania)|Blue Mountain]].<ref name=ptc1981/><ref name=patpmap/><ref name=gm/> The turnpike heads northeast along the base of Blue Mountain to an exit for [[Pennsylvania Route 997|PA&nbsp;997]]<ref name=patpmap/><ref name=gm/> and enters [[Cumberland County, Pennsylvania|Cumberland County]], heading east through the [[Cumberland Valley]] on a stretch known as "the straightaway".<ref name=gm/><ref name=adc/><ref name=dakelman64>{{harvp|Dakelman|Schorr|2004|p=64|ps=.}}</ref> It then reaches [[Carlisle, Pennsylvania|Carlisle]] and an interchange with [[U.S. Route 11 in Pennsylvania|US&nbsp;11]], accessing [[Interstate 81 in Pennsylvania|I-81]].<ref name=patpmap/><ref name=gm/>