View source for Interstate 79

{{Short description|Interstate Highway in Pennsylvania and West Virginia}}
{{Use mdy dates|date=March 2022}}
{{Use American English|date=June 2022}}
{{Infobox road
|country = USA
|route = 79
|type = I
|map = {{maplink-road}}
|map_custom = yes
|map_notes = I-79 highlighted in red
|length_mi = 343.46
|length_ref = <ref name="fhwa">{{cite web |last=Starks |first=Edward |date=January 27, 2022 |title=Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |access-date=March 31, 2023 |work=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]]}}</ref>
|direction_a = South
|direction_b = North
|established = 1958
|maint = [[West Virginia Division of Highways|WVDOH]] and [[Pennsylvania Department of Transportation|PennDOT]]
|terminus_a = {{jct|state=WV|I|77}} in [[Charleston, West Virginia|Charleston, WV]]
|terminus_b = [[Bayfront Parkway]] in [[Erie, Pennsylvania|Erie, PA]]
|junction = <!-- Major junctions only; Only 5-8 most major intersections and cities belong here; please read [[WP:USRD/STDS]] for more info -->
*{{jct|state=WV|US|33|US|48|US|119}} near [[Weston, West Virginia|Weston, WV]]
*{{jct|state=WV|US|50}} near [[Clarksburg, West Virginia|Clarksburg, WV]]
*{{jct|state=WV|I|68}} near [[Morgantown, West Virginia|Morgantown, WV]]
*{{jct|state=PA|I|70}} near [[Washington, Pennsylvania|Washington, PA]]
*{{jct|state=PA|Toll|576}} near [[Cecil Township, Pennsylvania|Cecil Township, PA]]
*{{jct|state=PA|I|376|US|22|US|30}} near [[Carnegie, Pennsylvania|Carnegie, PA]]
*{{jct|state=PA|I|279}} in [[Franklin Park, Pennsylvania|Franklin Park, PA]]
*{{jct|state=PA|I|76|PATP||US|19}} in [[Cranberry Township, Butler County, Pennsylvania|Cranberry Township, PA]]
*{{jct|state=PA|I|80}} in [[Findley Township, Mercer County, Pennsylvania|Findley Township, PA]]
*{{jct|state=PA|I|90}} in [[McKean Township, Pennsylvania|McKean, PA]]
|states = [[West Virginia]], [[Pennsylvania]]
|counties = '''WV:''' [[Kanawha County, West Virginia|Kanawha]], [[Roane County, West Virginia|Roane]], [[Clay County, West Virginia|Clay]], [[Braxton County, West Virginia|Braxton]], [[Gilmer County, West Virginia|Gilmer]], [[Lewis County, West Virginia|Lewis]], [[Harrison County, West Virginia|Harrison]], [[Marion County, West Virginia|Marion]], [[Monongalia County, West Virginia|Monongalia]]<br>'''PA:''' [[Greene County, Pennsylvania|Greene]], [[Washington County, Pennsylvania|Washington]], [[Allegheny County, Pennsylvania|Allegheny]], [[Butler County, Pennsylvania|Butler]], [[Lawrence County, Pennsylvania|Lawrence]], [[Mercer County, Pennsylvania|Mercer]], [[Crawford County, Pennsylvania|Crawford]], [[Erie County, Pennsylvania|Erie]]
|browse = {{wv browse|previous_type=WV|previous_route=78|route=[[West Virginia State Highways|WV]]|next_type=WV|next_route=80}}
{{pa browse|previous_type=PA 1960|previous_route=78|route=[[Pennsylvania State Route System|PA]]|next_type=PA 1960|next_route=79}}
{{pa browse|previous_type=PA|previous_route=178|route=I-179|next_type=PA|next_route=179}}
}}
'''Interstate&nbsp;79''' ('''I-79''') is an [[Interstate Highway]] in the [[Eastern United States]], designated from [[Interstate 77|I-77]] in [[Charleston, West Virginia]], north to [[Pennsylvania Route 5]] (PA&nbsp;5) and [[Pennsylvania Route 290|PA&nbsp;290]] in [[Erie, Pennsylvania]]. It is a primary thoroughfare through western [[Pennsylvania]] and [[West Virginia]] and makes up part of an important corridor to [[Buffalo, New York]], and the [[Canada–United States border]]. Major metropolitan areas connected by I-79 include [[Charleston metropolitan area, West Virginia|Charleston]] and [[Morgantown metropolitan area|Morgantown]] in West Virginia and [[Greater Pittsburgh]] and Erie in Pennsylvania.

In West Virginia, I-79 is known as the '''Jennings Randolph Expressway''', named for [[Jennings Randolph|the West Virginia representative and senator]]. In [[North Central West Virginia|the three most northern counties]], it is signed as part of the High Tech Corridor. For most of its Pennsylvania stretch, it is known as the '''Raymond P. Shafer Highway''', named for [[Raymond P. Shafer|the 39th Pennsylvania governor]].

==Route description==
{{lengths table|length_ref=<ref name="fhwa" />}}
|-
|{{abbr|WV|West Virginia}}
|{{convert|160.52|mi|km|disp=table}}
|-
|{{abbr|PA|Pennsylvania}}
|{{convert|182.94|mi|km|disp=table}}
|-
|'''Total'''
|{{convert|343.46|mi|km|disp=table}}
|}
Except at its northern end, I-79 is located on the [[Allegheny Plateau]]. Despite the somewhat rugged terrain, the road is relatively flat. Most of the highway is at an elevation of about {{convert|1000|to|1200|ft|m}} above [[sea level]], with some lower areas near both ends and higher areas near [[Sutton, West Virginia]]. In the hillier areas, this flatness is achieved by curving around hills, along ridges, and in or partway up river valleys.<ref name=topos>[[United States Geological Survey]] [[topographic map]]s and aerial photos, accessed via [[Terraserver-USA]]</ref> From Sutton north, I-79 generally parallels the path of [[U.S. Route&nbsp;19]] (US&nbsp;19).

===West Virginia===
{{expand section|date=April 2022}}
<!--
[[File:2017-07-24 09 41 34 View north along Interstate 79 (Jennings Randolph Highway) just north of Exit 67 (U.S. Route 19, West Virginia State Route 15, Flatwoods) in Flatwoods, Braxton County, West Virginia.jpg|thumb|left|I-79 north of [[U.S. Route 19|US&nbsp;19]] at [[West Virginia Route 15]] in [[Flatwoods, West Virginia]]]]
[[File:Weston WV aerial 2021.jpg|thumb|Aerial view of I-79 and surrounding terrain as it approaches [[Weston, West Virginia]], from the south]]
-->
I-79 begins at a modified [[full Y interchange]] with [[Interstate 77|I-77]] along the northwest bank of the [[Elk River (West Virginia)|Elk River]] just northeast of [[Charleston, West Virginia|Charleston]]. (Instead of the expected treatment of I-77 as the primary route at this interchange, the following traffic movements are found: northbound I-77 through traffic curves to the left, while traffic to northbound I-79 exits right; southbound I-77 through traffic curves to the right and merges on the right with traffic from southbound I-79, while traffic to northbound I-79 both exits and merges on the left; southbound I-79 traffic merges on the left with traffic from southbound I-77, while traffic to northbound I-77 both exits and merges on the left.) For its first {{convert|67|mi|km}} to a point just south of [[Flatwoods, West Virginia|Flatwoods]], I-79 is located in the [[drainage basin|watershed]] of the Elk River, which drains into the [[Kanawha River]]. It crosses the Elk River at [[Frametown, West Virginia|Frametown]] and again at [[Sutton, West Virginia|Sutton]] and never strays more than about {{convert|15|to|20|mi|km}} from it.<ref name=topos/><ref name=watersheds>[[National Atlas of the United States]], [http://nationalatlas.gov/atlasftp.html#hucs00m Hydrologic Units (Watersheds) GIS data]{{webarchive|url=https://web.archive.org/web/20130504145622/http://www.nationalatlas.gov/atlasftp.html|date=May 4, 2013}}</ref>

===Pennsylvania===
[[File:2022-05-14 11 27 49 View north along Interstate 79 just north of Exit 7 in Whiteley Township, Greene County, Pennsylvania.jpg|thumb|left|I-79 northbound past exit&nbsp;7 in [[Whiteley Township, Pennsylvania]]]]
I-79 enters [[Pennsylvania]] from [[Morgantown, West Virginia]]. South of [[Washington, Pennsylvania|Washington]], it traverses mostly rural [[Greene County, Pennsylvania|Greene County]].

Between milemarkers&nbsp;34 and 38, I-79 [[concurrency (road)|overlaps]] [[Interstate 70|I-70]] in the Washington area before heading north toward [[Pittsburgh]].

I-79 is carried over the [[Ohio River]] by the [[Neville Island Bridge]], approximately {{convert|8|mi|km|spell=in}} northwest of Pittsburgh.

[[Interstate 279|I-279]] merges into I-79 in [[Franklin Park, Pennsylvania|Franklin Park]], just south of [[Wexford, Pennsylvania|Wexford]] between mile markers 71 and 72.

The freeway into Pittsburgh requires drivers to use [[Interstate 376|I-376]] while I-79 completely bypasses the city. Beyond the Pittsburgh area, I-79 traverses more rural areas in [[Butler County, Pennsylvania|Butler]], [[Lawrence County, Pennsylvania|Lawrence]], [[Mercer County, Pennsylvania|Mercer]], [[Crawford County, Pennsylvania|Crawford]], and [[Erie County, Pennsylvania|Erie]] counties before arriving at its termination point in [[Erie, Pennsylvania|Erie]]. In Erie, [[Interstate 90|I-90]] connects from I-79 to [[Buffalo, New York]], and the Canadian border.

Around milemarker&nbsp;100 on the northbound side are two [[ghost ramp]]s that were specifically built for the [[Boy Scouts of America]] in order to have access to [[Moraine State Park]] without having to travel on [[U.S. Route&nbsp;422|US&nbsp;422]] for the [[1973 National Scout Jamboree|1973]] and [[1977 National Scout Jamboree|1977]] National Scout Jamborees, which were held at Moraine. The ramps were permanently closed after the 1977 event but remain visible under encroaching vegetation.<ref>{{cite web |url = https://www.gribblenation.com/papics/ghostramps/ramps.html |title = Ghost Ramps |website = Gribblenation.com |date = June 5, 2005 |access-date = August 8, 2017 }}{{self-published inline|certain=yes|date=March 2022}}</ref><ref>{{Google maps|url=https://maps.google.com/maps?q=40.972705,-80.132024&hl=en&sll=41.068419,-80.057381&sspn=0.036691,0.077162&t=h&z=16 |title=Ghost ramps around the 100 mile marker |access-date=August 8, 2017}}</ref>

==History==
{{Redirect|I-179|the submarine|Japanese submarine I-179|the identification card formerly issued by the United States Immigration and Naturalization Service|Identity documents in the United States}}
[[File:Interstate7079Washington.jpg|thumb|left|I-79 merging with [[Interstate 70|I-70]] in [[Washington, Pennsylvania]]]]
The [[Pennsylvania General Assembly]] authorized the [[Pennsylvania Turnpike Commission]] to build two extensions in the 1950s. The Northwestern Extension, authorized in 1953, was to stretch from the main [[Pennsylvania Turnpike]] north to [[Erie, Pennsylvania|Erie]] and would have included a lateral connection between [[Ohio]] and [[New York (state)|New York]], what was later built as [[Interstate 90|I-90]].<ref>Pennsylvania Turnpike Northwestern Extension Act, P.L. 706, No. 229, passed July 28, 1953</ref> The Southwestern Extension, authorized in 1955, was to run south from the main line near [[Pittsburgh]] to [[West Virginia]], where it connects with an extension of the [[West Virginia Turnpike]].<ref>Pennsylvania Turnpike Southwestern Extension Act, P.L. 174, No. 52, passed June 14, 1955</ref> Except for the section between Washington and [[Greater Pittsburgh]], which was included as part of [[Interstate 70|I-70]],<ref>{{cite map |author = Public Roads Administration |url = https://commons.wikimedia.org/wiki/File:Interstate_Highway_plan_August_14,_1957.jpg |title = Official Route Numbering for the National System of Interstate and Defense Highways, as adopted by the American Association of State Highway Officials |date = August 14, 1957 |scale = Scale not given |location = Washington, DC |publisher = Public Roads Administration |via = [[Wikimedia Commons]] }}</ref> the first portion of I-79 to be added to the plans was north from Pittsburgh to Erie, along the [[U.S. Route 19|US&nbsp;19]] corridor.

{{Infobox road small
|state=PA
|type=I 1957
|route= 179
|location=[[Erie, Pennsylvania|Erie]]
|formed=November 12, 1958
|deleted=1968
}}
{{Infobox road small
|state=PA
|type=I
|route=279
|location=[[Pittsburgh]]
|formed=September 16, 1989
|length_mi=13.32
}}
In September 1955, two short urban portions were designated:<ref>{{cite map |author = Bureau of Public Roads |date = September 1955 |map = Erie |map-url = https://commons.wikimedia.org/wiki/File:Erie,_Pennsylvania_1955_Yellow_Book.jpg |title = General Location of National System of Interstate Highways Including All Additional Routes at Urban Areas Designated in September 1955 |scale = Scale not given |location = Washington, DC |publisher = Government Printing Office |page = 74 |oclc = 4165975 |via = Wikimedia Commons }}</ref><ref>{{cite map |author = Bureau of Public Roads |date = September 1955 |map = Pittsburgh and environs |map-url = https://en.wikipedia.org/wiki/File:Pittsburgh,_Pennsylvania_1955_Yellow_Book.jpg |title = General Location of National System of Interstate Highways Including All Additional Routes at Urban Areas Designated in September 1955 |scale = Scale not given |location = Washington, DC |publisher = Government Printing Office |page = 77 |oclc = 4165975 |via = Wikimedia Commons }}</ref>
* I-179: A spur from I-90 north to Erie, currently absorbed into I-79.<ref>{{cite web |url = https://www.kurumi.com/roads/3di/ix79.html |title = 3-digit Interstates from I-79 |work = kurumi.com }}{{self-published inline|certain=yes|date=March 2022}}</ref>
* [[Interstate 279|I-279]]: A western bypass of Pittsburgh, connecting I-70 with I-80S (now [[Interstate 76 (Ohio–New Jersey)|I-76]]); it and I-79 later swapped designations.

The number&nbsp;79 was assigned in 1958,<ref>{{cite map |author = Bureau of Public Roads |url = https://commons.wikimedia.org/wiki/File:Interstate_Highway_plan_June_27,_1958.jpg |title = Official Route Numbering for the National System of Interstate and Defense Highways, as adopted by the American Association of State Highway Officials |date = June 27, 1958 |scale = Scale not given |location = Washington, DC |publisher = Bureau of Public Roads |via = Wikimedia Commons }}</ref> and an extension south along I-70 to Washington and beyond to [[Charleston, West Virginia|Charleston]] was approved on October 18, 1961.<ref>{{cite news |work = [[Charleston Daily Mail]] |title = Third Route Alters Interstate Picture, SRC Tells Mayors |date = October 20, 1961 }}{{page needed|date=March 2022}}</ref> This extension also paralleled US&nbsp;19 to near [[Sutton, West Virginia|Sutton]], where it turned westerly to reach Charleston. (The part of US&nbsp;19 from Sutton south to [[Interstate 77|I-77]] at [[Beckley, West Virginia]], has since been four-laned as [[Corridor L]] of the [[Appalachian Development Highway System]].)

On December 21, 1967, the first section of I-79 in West Virginia, between exits&nbsp;125 (Saltwell Road) and 132 (South Fairmont), opened to traffic.<ref>{{cite news |work = Charleston Daily Mail |title = 5-Mile I-79 Link Will Open December 21 |date = December 7, 1967 }}{{page needed|date=March 2022}}</ref> This {{convert|5|mi|km|spell=in|adj=on}} section bypassed part of [[West Virginia Route 73]] (WV&nbsp;73) between [[Bridgeport, West Virginia|Bridgeport]] and [[Fairmont, West Virginia|Fairmont]]. Another {{convert|5|mi|km|spell=in}} opened in July 1968, extending the highway on a bypass of downtown Fairmont to exit&nbsp;137 (East Park Avenue).<ref>{{cite news |work = Charleston Daily Mail |title = 5 Miles of I-79 Opens in Marion |date = July 20, 1968 }}{{page needed|date=March 2022}}</ref> It was further extended {{convert|9.5|mi|km}} toward [[Morgantown, West Virginia|Morgantown]] on October 15, 1970, bypassing more of WV&nbsp;73 to exit&nbsp;146 (Goshen Road) south of that city.<ref>{{cite news |work = [[Charleston Gazette]] |title = Gov. Moore Will Open I-79 Segment |date = October 10, 1970 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = Charleston Gazette |title = Moore Opens I-79 Portion, Restates Vow |date = October 16, 1970 }}{{page needed|date=March 2022}}</ref><ref name="RDR">Release Date Report. [[West Virginia Department of Transportation]]. August 2003.</ref>

On June 29, 1970, the swap of I-79 and I-279 was approved. At the same time, I-76 was extended west from [[Downtown Pittsburgh]] over former I-79 to the new location of I-79 west of Pittsburgh, so I-279 only ran north from Downtown Pittsburgh. On December 3, 1971, I-76 was rerouted to [[Pennsylvania Turnpike|bypass Pittsburgh]], and I-279 was extended to I-79 utilizing the former section of I-76.<ref>{{cite web |first = Richard |last = Weingroff |date = June 27, 2017 |publisher = Federal Highway Administration |url = https://www.fhwa.dot.gov/infrastructure/i76.cfm |work = Ask the Rambler |title = Was I-76 Numbered to Honor Philadelphia for Independence Day, 1776? }}</ref> The changes took effect on October 2, 1972.<ref name=1972news>{{cite news |title = Interstates Renumbered |url = https://www.newspapers.com/clip/15491728/interstates_redone_10272_february/ |access-date = November 30, 2017 |work = The Pittsburgh Press |date = February 24, 1972 |page = 8 |via = [[Newspapers.com]] }}</ref>

On June 29, 1973, I-79 was extended from West Virginia exit&nbsp;146 to exit&nbsp;148 ([[Interstate 68|I-68]]), where, at one point, traffic was forced onto the newly opened west end of Corridor E (now I-68) to exit&nbsp;1.<ref>{{cite news |work = Charleston Daily Mail |title = 5 More Miles of I-79 Being Opened Today |date = June 29, 1973 }}{{page needed|date=March 2022}}</ref> A further extension of {{convert|6|mi|km|spell=in}}, including the Uffington Bridge over the [[Monongahela River]] southwest of Morgantown, was opened on August 30, 1973, leading north to exit&nbsp;155 ([[Star City, West Virginia|Star City]]).<ref>{{cite news |work = [[Charleston Gazette]] |title = 6-Mile Stretch of I-79 Open |date = August 31, 1973 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = Charleston Gazette |date = September 5, 1973 }}{{page needed|date=March 2022}}</ref> This completed I-79 from north of Bridgeport to north of Morgantown.

To the south of Bridgeport, the first two sections were both opened on December 22, 1971. One of these ran {{convert|10|mi|km}} from exit&nbsp;51 ([[Frametown, West Virginia|Frametown]]) to exit&nbsp;62 (Sutton), and the other from exit&nbsp;105 ([[Jane Lew, West Virginia|Jane Lew]]) to exit&nbsp;115 ([[Nutter Fort, West Virginia|Nutter Fort]]).<ref>{{cite news |work = [[Dominion News]] |title = Two I-79 Sections Opened |date = December 23, 1971 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = Charleston Daily Mail |title = 40 Miles More of I-79 Open |date = December 23, 1971 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = Charleston Gazette |title = I-79 Mileage Increased to 40 |date = December 23, 1971 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = Dominion News |date = January 23, 1972 }}{{page needed|date=March 2022}}</ref><!--describes the {{convert|40|mi|km}} in use--> On September 19, 1973, another {{convert|7.5|mi|km|adj=on}} stretch was opened, from exit&nbsp;105 (Jane Lew) south to exit&nbsp;99 ([[Weston, West Virginia|Weston]]).<ref>{{cite news |work = Charleston Daily Mail |title = I-79 Segment Opened by Governor Moore |date = September 20, 1973 }}{{page needed|date=March 2022}}</ref>

In 1973, significant portions of the Interstate were completed.<ref name="RDR"/> I-79 opened from exit&nbsp;62 to exit&nbsp;99. Another {{convert|23.9|mi|km}}, from exit&nbsp;67 ([[Flatwoods, West Virginia|Flatwoods]]) north to exit&nbsp;91 ([[Roanoke, West Virginia|Roanoke]]), opened on November 28, 1973, along with the section from exit&nbsp;115 north to exit&nbsp;117 ([[Anmoore, West Virginia|Anmoore]]),<!--or was Anmoore earlier? it was certainly open by then--> completing the route between Frametown and Morgantown except in the Bridgeport area.<ref>{{cite news |work = Charleston Daily Mail |title = More of I-79 to Be Opened Tomorrow |date = November 27, 1973 }}</ref><ref name="AutoXU-25">{{cite news |work = Charleston Gazette |title = Open I-79 Increasing by 25.17 Miles |date = November 28, 1973 }}{{page needed|date=March 2022}}</ref>

A {{convert|5.5|mi|km|adj=on}} extension from exit&nbsp;51 south to exit&nbsp;46 ([[Servia, West Virginia|Servia]]) opened on February 1, 1974,<ref>{{cite news |work = Charleston Gazette |title = Additional Interstates to Open |date = January 30, 1974 }}{{page needed|date=March 2022}}</ref> and County Route&nbsp;11 to [[West Virginia Route 4|WV&nbsp;4]] near [[Duck, West Virginia|Duck]] was widened to handle the increased load.<ref>{{cite news |work = Charleston Gazette |title = Highway Project Bids to Be Opened |date = March 8, 1972 }}{{page needed|date=March 2022}}</ref><!--completion date set for August 30, 1973--> On the same day, two lanes opened from exit&nbsp;155 ([[Osage, West Virginia|Osage]]) north to the state line.{{Citation needed|date=July 2007}}<!--article says Osage to PA; later article says four lanes will open later-->

On October 16, 1974, two pieces of I-79 were opened: the other two lanes{{Citation needed|date=July 2007}} of the {{convert|6.6|mi|km}} from exit&nbsp;155 to the state line and {{convert|7.1|mi|km}} between exits&nbsp;117 (Anmoore) and 125 (north of Bridgeport). On the same day, the eastern end of [[Corridor D]] and the western end of Corridor E, both connecting to I-79 (at exits&nbsp;119 and 148), were opened. This completed I-79 in West Virginia north of exit&nbsp;46 (Servia);<ref>{{cite news |work = Charleston Gazette |title = Moore Will Open 22 New Miles |date = October 8, 1974 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = Charleston Gazette |title = 22 Miles of Roads Opened |date = October 17, 1974 }}{{page needed|date=March 2022}}</ref><ref>{{cite news |work = [[The Daily Courier (Arizona)|Daily Courier]] |location = Prescott, Arizona |title = W. Va. to Open Over 22 Miles of Highways |date = October 10, 1974 }}{{page needed|date=March 2022}}</ref> it was extended south to exit&nbsp;25 ([[Amma, West Virginia|Amma]]) in late November<ref>{{cite news |work = Charleston Gazette |title = Holiday Travelers to Find I-79 Nonstop from Amma |date = November 28, 1974 }}{{page needed|date=March 2022}}</ref><!--article says Amma to Big Otter&nbsp;— maybe Big Otter to Servia was earlier?--> and to [[U.S. Route 119|US&nbsp;119]] north of [[Clendenin, West Virginia|Clendenin]] (exit&nbsp;19) on November 13, 1975.<ref>{{cite news |work = Charleston Gazette |title = New I-79 Stretch Will Open Today |date = November 13, 1975 }}{{page needed|date=March 2022}}</ref> It was opened from exit&nbsp;19 to exit&nbsp;9 ([[Elkview, West Virginia|Elkview]]) on November 18, 1977,<ref>{{cite news |work = Charleston Daily Mail |date = November 18, 1977 }}{{page needed|date=March 2022}}</ref> and finally completed to I-77 in 1979.<ref name="RDR"/>

On July 25, 1975, I-79 was opened between exits&nbsp;1 and 14 in Pennsylvania.<ref>{{cite news |work = Daily Courier |location = Prescott, Arizona |title = I-79 Opening Today in Greene County |date = July 25, 1975 }}{{page needed|date=March 2022}}</ref> The last piece of I-79 between West Virginia and Erie—the [[Neville Island Bridge]] over the [[Ohio River]]—opened on September 3, 1976.<ref>{{cite news |work = [[Valley Independent]] |title = Interstate 79 opened in Erie |date = September 4, 1976 }}{{page needed|date=March 2022}}</ref> In 1984, the route was extended about {{convert|1|mi|km|spell=in}} further to the north, with the opening of a new segment between [[U.S. Route 20|US&nbsp;20]] and [[Pennsylvania Route 5|PA&nbsp;5]] in Erie.<ref name= "pa highways">{{Cite web |title = Pennsylvania Highways: Interstate 79 |url = https://www.pahighways.com/interstates/I79.html |access-date = March 22, 2022 |website = Pennsylvania Highways }}{{self-published inline|certain=yes|date=March 2022}}</ref>

I-79 was completely rebuilt from the West Virginia state line to Erie from 1991 to 1993. Pavement was rebuilt bridge decks replaced, and rest area rebuilt.<ref>{{cite news |last = Grata |first = Joe |date = March 31, 1991 |title = PennDOT to Restrict I-79 Lanes This Year |url = https://news.google.com/newspapers?id=4JQcAAAAIBAJ&sjid=92MEAAAAIBAJ&pg=6903%2C8477225 |department = Road Report |work = The Pittsburgh Press |page = A14 |via = Google News Archive Search }}</ref>

Milepost based exit numbers were introduced to the Pennsylvania portion in 2001.<ref name= "pa highways"/>

In 2000, construction began on the interchange with the Pennsylvania Turnpike in Cranberry. It was opened to traffic in 2004.<ref name= "pa highways"/>

In late 2008, the missing ramps of the I-79/I-376 interchange (PA&nbsp;60 was designated as the route for southbound traffic seeking to go to [[Pittsburgh International Airport]] and for airport traffic seeking to go northbound on I-79) were completed.<ref>{{cite web |url = https://www.post-gazette.com/local/neighborhoods/2008/08/02/Missing-links-take-shape-at-I-79-Parkway-West/stories/200808020112 |title = 'Missing links' take shape at I-79/Parkway West |work = Pittsburgh Post-Gazette }}</ref>

In June 2009, I-376 was extended west and north of Downtown Pittsburgh, and I-279 was truncated back to the section only running from Downtown Pittsburgh north to I-79.

During 2010, PennDOT undertook a $20.8 million improvement of I-79, Neville Island Bridge as well as other intersections.<ref name=gazette>{{cite news|last=Schmitz|first=Jon|title=Neville Island Bridge project to bring closures, restrictions |url=http://www.post-gazette.com/stories/news/transportation/neville-island-bridge-project-to-bring-closures-restrictions-353997/|publisher=www.post-gazette.com|access-date=11 November 2012|date=18 August 2009}}</ref>

On December 22, 2010, WVDOT competed construction on a new interchange to serve Route 173.<ref name="Fairmont opens">{{cite news |last = Panuska |first = Mallory |title = Gateway Connector opens today |url = http://timeswv.com/local/x1053122549/Gateway-Connector-opens-today |access-date = December 22, 2010 |newspaper = [[Times West Virginian]] |location = Fairmont, West Virginia |date = December 22, 2010 }}</ref>

In 2010, construction began on improvements to exit 88. This was competed in December 2012.

Construction began in 2011 on improvements to the interchange with Interstate 70 in South Strabane. They were competed in Summer 2013.<ref name= "pa highways"/>

In 2020, a new safety system went into effect to better warn motorists about the sharp curvature between the PA 60 interchange and PA 51 interchange.<ref name= "pa highways"/>

Construction of the PA 576 interchange was completed on June 24, 2022.<ref>{{cite news|last=Blazina|first=Ed|title=Pennsylvania Turnpike finishes Southern Beltway, ready to begin Mon-Fayette Expressway|work=Pittsburgh Post-Gazette|date=June 19, 2022|url=https://www.post-gazette.com/news/transportation/2022/06/19/southern-beltway-mon-fayette-expressway-pennsylvania-turnpike/stories/202206160141|accessdate=June 19, 2022}}</ref><ref>{{cite news|title=Southern Beltway fully opens Friday|publisher=KDKA-TV|location=Pittsburgh, PA|date=June 23, 2022|url=https://www.cbsnews.com/pittsburgh/news/full-southern-beltway-opens-friday/|access-date=June 27, 2022}}</ref> This involved construction of a new underpass.

In 2025, WVDOT expects to compete a six-lane widening between Harrison County and the Pennsylvania state line.<ref>{{cite web | title=Work on Interstate 79 widening and bridge projects nearing completion in Harrison, Marion, and Monongalia counties | url=https://transportation.wv.gov/communications/PressRelease/Pages/Work_on_Interstate_79_widening_and_bridge_projects_nearing_completion_in_Harrison_Marion_and_Monongalia_counties.aspx }}</ref>

==Exit list==
{{clear}}
{{jcttop|old|length_ref=<ref name=NHPN>[[Federal Highway Administration]], [https://web.archive.org/web/20020130205232/http://www.fhwa.dot.gov/planning/nhpn/ National Highway Planning Network GIS data] version 2005.08<!-- Mileages with one decimal place need a separate citation.--></ref>|exit_ref=<br><ref name=newexits/>|old_ref=<br><ref name=newexits>{{Cite web |url = http://www.dot.state.pa.us/public/pdf/mileageb.pdf |title = Pennsylvania Exit Numbering |access-date = October 2, 2007 |publisher = Pennsylvania Department of Transportation |archive-date = December 23, 2015 |archive-url = https://web.archive.org/web/20151223153329/http://www.dot.state.pa.us/public/pdf/mileageb.pdf |url-status = dead }}</ref>|state_col=State}}
{{WVint|old
|sspan=37
|county=Kanawha
|cspan=5
|location=Charleston
|lspan=3
|mile=0.000
|exit=—
|old=
|road={{jct|state=WV|I|77|I|64|to2=to|city1=Parkersburg|city2=Charleston}}
|notes=Southern terminus; I-77 exit&nbsp;104; modified [[full Y interchange]]
}}
{{WVint|old
|mile=1.845
|exit=1
|road={{jct|state=WV|US|119|city1=Mink Shoals}}
|notes=Access to Coonskin Park
}}
{{WVint|old
|mile=5.047
|exit=5
|road={{jct|state=WV|US|119|city1=Big Chimney|name1=[[West Virginia Route 114|WV&nbsp;114]]}}
|notes=Northern terminus of WV&nbsp;114}}
{{WVint|old
|location=Pinch
|mile=9.469
|exit=9
|road={{jct|state=WV|CR|43|county1=Kanawha|name1=Frame Road|city1=Elkview}}
}}
{{WVint|old
|location=Clendenin
|mile=19.091
|exit=19
|road={{jct|state=WV|US|119|city1=Clendenin|name1=CR 53}}
}}
{{WVint|old
|county=Roane
|cspan=2
|location=Amma
|mile={{#expr: 19.091 + 6.19}}
|exit=25
|road={{jct|state=WV|CR|29|county1=Roane|city1=Amma}}
}}
{{WVint|old
|location=none
|mile={{#expr: 19.091 + 14.65}}
|exit=34
|road={{jct|state=WV|WV|36|city1=Wallback|city2=Clay}}
}}
{{WVint|old
|county=Clay
|location=none
|mile=39.899
|exit=40
|road={{jct|state=WV|WV|16|city1=Big Otter}}
}}
{{WVint|old
|county=Braxton
|cspan=6
|location=none
|mile={{#expr: 39.899 + 6.20}}
|exit=46
|old=
|road={{jct|state=WV|CR|11|county1=Braxton|name1=Servia Road}}
}}
{{WVint|old
|location=Frametown
|mile=51.569
|exit=51
|old=
|road={{jct|state=WV|WV|4|city1=Frametown}}
}}
{{WVint|old
|location=none
|mile=57.607
|exit=57
|old=
|type=concur
|road={{jct|state=WV|US|19|dir1=south|city1=Beckley|city2=Summersville}}
|notes=Southern end of US&nbsp;19 concurrency; access to [[New River Gorge]]
}}
{{WVint|old
|location=Sutton
|mile=61.465
|exit=62
|road={{jct|state=WV|WV|4|city1=Sutton|city2=Gassaway}}
}}
{{WVint|old
|location=Flatwoods
|mile={{#expr: 61.465 + 5.50}}
|exit=67
|type=concur
|road={{jct|state=WV|US|19|WV|15|dir1=north|name1=[[West Virginia Route 4|WV&nbsp;4]]|city1=Flatwoods}}
|notes=Northern end of US&nbsp;19 concurrency; access to [[Sutton Lake (West Virginia)|Sutton Lake]]
}}
{{WVint|old
|location=Burnsville
|mile=78.909
|exit=79
|old=
|road={{jct|state=WV|WV|5|city1=Burnsville|city2=Glenville}}
|notes=Access to [[Glenville State College]] and [[Burnsville Dam]]
}}
{{jctco|state=WV|county=Gilmer|old}}
{{WVint|old
|county=Lewis
|cspan=4
|location=none
|mile=90.988
|exit=91
|old=
|road={{jct|state=WV|US|19|city1=Stonewall Resort|city2=Roanoke}}
|notes=Access to [[Stonewall Jackson Lake State Park]]
}}
{{WVint|old
|location=Weston
|lspan=2
|mile={{#expr: 90.988 + 4.94}}
|exit=96
|road={{jct|state=WV|CR|30|county1=Lewis|city1=South Weston}}
|notes=Access to [[Stonewall Jackson Lake]] and [[Jackson's Mill]]
}}
{{WVint|old
|mile=98.608
|exit=99
|road={{jct|state=WV|US|33|US|48|US|119|city1=Weston|city2=Buckhannon}}
|notes=Access to [[West Virginia Wesleyan College]] and [[Davis and Elkins College]]
}}
{{WVint|old
|location=Jane Lew
|mile={{#expr: 98.608 + 6.43}}
|exit=105
|road={{jct|state=WV|CR|7|county1=Lewis|city1=Jane Lew}}
|notes=Access to [[Jackson's Mill]]
}}
{{WVint|old
|county=Harrison
|cspan=7
|location=Lost Creek
|mile={{#expr: 98.608 + 11.08}}
|mile2={{#expr: 98.608 + 11.08 + 0.907}}
|exit=110
|old=
|road={{jct|state=WV|WV|270|city1=Lost Creek}}
|notes=Eastern terminus of WV&nbsp;270
}}
{{WVint|old
|location=Stonewood
|mile=115.75
|exit=115
|old=
|road={{jct|state=WV|WV|20|city1=Stonewood|city2=Nutter Fort}}
|notes=Access to [[Alderson Broaddus University]]
}}
{{WVint|old
|location=Clarksburg
|lspan=2
|mile={{#expr: 115.75 + 2.38}}
|exit=117
|old=
|road={{jct|state=WV|WV|58|city1=Anmoore}}
}}
{{WVint|old
|mile={{#expr: 115.75 + 3.88}}
|exit=119
|old=
|road={{jct|state=WV|US|50|city1=Clarksburg|city2=Bridgeport|name1=[[Corridor D]]}}
|notes=Access to [[Salem International University]]
}}
{{WVint|old
|location=Bridgeport
|lspan=2
|mile=121.7
|exit=121
|old=
|road={{jct|state=WV|CR|24|county1=Harrison|name1=Meadowbrook Road}}
|notes=Access to Jeremy's mom's house
}}
{{WVint|old
|mile={{#expr: 115.75 + 8.59}}
|exit=124
|old=
|road={{jct|state=WV|WV|279|US|50|to2=to|dir2=east|extra=airport}}
|notes=Access to [[North Central West Virginia Airport]], [[Tygart Lake State Park]], and United Hospital Center
}}
{{WVint|old
|location=none
|mile={{#expr: 115.75 + 9.61}}
|exit=125
|road={{jct|state=WV|WV|131|city1=Shinnston|name1=Saltwell Road}}
}}
{{WVint|old
|county=Marion
|cspan=6
|location=White Hall
|mile=132.086
|exit=132
|road={{jct|state=WV|US|250|city1=Fairmont|city2=White Hall}}
}}
{{WVint|old
|location=Fairmont
|lspan=5
|mile={{#expr: 132.086 + 1.27}}
|exit=133
|road={{jct|state=WV|CR|64|denom1=1|county1=Marion|name1=Kingmont Road}}
}}
{{WVint|old
|mile={{#expr: 132.086 + 2.84}}
|exit=135
|road={{jct|state=WV|CR|64|county1=Marion|name1=Pleasant Valley Road}}
}}
{{WVint|old
|mile={{#expr: 132.086 + 3.92}}
|exit=136
|road={{jct|state=WV|WV|273|location1=[[Fairmont, West Virginia|Downtown Fairmont]]}}
|notes= Southern terminus of WV&nbsp;273; exit fully opened on December 22, 2010.<ref name="Fairmont opens"/>
}}
{{WVint|old
|mile=136.660
|exit=137
|road={{jct|state=WV|WV|310|name1=East Park Avenue}}
|notes=Access to [[Valley Falls State Park]]
}}
{{WVint|old
|mile={{#expr: 136.660 + 2.13}}
|exit=139
|road={{jct|state=WV|CR|33|county1=Marion|name1=Pricketts Creek Road|city1=East Fairmont}}
|notes=Access to [[Prickett's Fort State Park]]
}}
{{WVint|old
|county=Monongalia
|cspan=5
|location=none
|mile={{#expr: 136.660 + 8.96}}
|exit=146
|road={{jct|state=WV|CR|77|county1=Monongalia|name1=Goshen Road}}
}}
{{WVint|old
|location=Morgantown
|mile=148.766
|exit=148
|road={{jct|state=WV|I|68|dir1=east|location1=[[Cumberland, Maryland|Cumberland]]}}
|notes=Western terminus of I-68; access to [[Mountaineer Field]] and [[Tygart Lake State Park]]
}}
{{WVint|old
|location=none
|mile=152.502
|exit=152
|road={{jct|state=WV|US|19|city1=Westover|city2=Morgantown}}
|notes=Access to [[Granville, West Virginia|Granville]]
}}
{{WVint|old
|location=none
|mile=153.4
|exit=153
|road={{jct|state=WV|CR|46|denom1=7|county1=Monongalia|name1=University Town Centre Drive}}
|notes=Access to Monongalia County Ballpark
}}
{{WVint|old
|location=none
|mile=154.836
|exit=155
|road={{jct|state=WV|WV|7|location1=[[West Virginia University]]}}
|notes=Access to [[Star City, West Virginia|Star City]], [[Osage, West Virginia|Osage]], and [[Mountaineer Field]]
}}
{{jctplace|old
|river=[[Mason–Dixon Line]]
|river_wide=yes
|mile=160.52
|mile2=0.0
|line=yes
|place=West Virginia–Pennsylvania state line
}}
{{PAint|old
|sspan=57
|county=Greene
|cspan=4
|location=Perry Township
|ctdab=Greene
|mile=0.8
|old=1
|exit=1
|road={{jct|state=PA|US|19|to1=To|city1=Mount Morris}}
}}
{{PAint|old
|location=Whiteley Township
|mile=6.8
|old=2
|exit=7
|road=Kirby, [[Garards Fort, Pennsylvania|Garards Fort]]
}}
{{PAint|old
|location=Franklin Township
|ctdab=Greene
|mile=14.0
|old=3
|exit=14
|road={{jct|state=PA|PA|21|city1=Masontown|city2=Waynesburg}}
|notes=Access to [[Waynesburg University]]
}}
{{PAint|old
|location=Washington Township
|ctdab=Greene
|mile=19.4
|old=4
|exit=19
|road={{jct|state=PA|US|19|PA|221|location1=Ruff Creek|city2=Jefferson|countydab2=Greene}}
}}
{{PAint|old
|county=Washington
|cspan=14
|location=West Bethlehem Township
|mile=23.4
|old=5
|exit=23
|road=[[Marianna, Pennsylvania|Marianna]], [[Prosperity, Pennsylvania|Prosperity]]
}}
{{PAint|old
|location=Amwell Township
|lspan=2
|mile=30.6
|old=6
|exit=30
|road={{jct|state=PA|US|19|city1=Amity|countydab1=Washington|city2=Lone Pine}}
}}
{{PAint|old
|mile=32.9
|old=7
|exit=33
|road={{jct|state=PA|US|40|city1=Laboratory}}
}}
{{PAint|old
|location=South Strabane Township
|lspan=6
|mile=34.4
|old=—
|exit=34 (NB)<br>21 (SB)
|type=concur
|road={{jct|state=PA|I|70|dir1=east|city1=New Stanton}}
|notes=Southern end of I-70 concurrency
}}
{{PAint|old
|mile=35.4
|old=8
|exit=20
|road={{jct|state=PA|PA|136|name1=Beau Street}}
|notes=Access to [[Washington & Jefferson College]]
}}
{{PAint|old
|mile=36.4
|old=7
|exit=19
|road={{jct|state=PA|US|19|name1=Murtland Avenue}}
|notes=[[Diverging diamond interchange]]
}}
{{PAint|old
|mile=37.9
|old=—
|exit=18 (NB)<br>38 (SB)
|type=concur
|road={{jct|state=PA|I|70|dir1=west|location1=[[Wheeling, West Virginia|Wheeling]]}}
|notes=Northern end of I-70 concurrency
}}
{{PAint|old
|mile=40.3
|old=8A
|exit=40
|road=[[Meadow Lands, Pennsylvania|Meadow Lands]]
|notes=Was Northbound exit and Southbound entrance until 2013
}}
{{PAint|old
|mile=41.1
|old=8<!--8B northbound-->
|exit=41
|road=Race Track Road
|notes=Access to [[Hollywood Casino at The Meadows]]
}}
{{PAint|old
|location=North Strabane Township
|lspan=2
|mile=43.4
|old=9
|exit=43
|road={{jct|state=PA|PA|519|city1=Eighty Four|city2=Houston}}
}}
{{PAint|old
|mile=45.5
|old=10
|exit=45
|road={{jct|state=PA|PA|980|to1=To|city1=Canonsburg}}
}}
{{PAint|old
|location=Cecil Township
|lspan=3
|mile=48.2
|old=10A
|exit=48
|road=[[Southpointe, Pennsylvania|Southpointe]], [[Hendersonville, Pennsylvania|Hendersonville]]
|notes=Access to [[Pennsylvania Western University, California]]'s Southpointe Campus and to the [[National Cemetery of the Alleghenies]]
}}
{{PAint|old
|old=—
|exit=49
|ospan=2
|espan=2
|type=incomplete
|road={{jct|state=PA|Toll|576|dir1=west|location1=[[Pittsburgh International Airport]]|extra=airport}}
|notes=Northbound exit and southbound entrance; exit 19 on PA&nbsp;576
}}
{{PAint
|mile=50.2
|type=incomplete
|road={{jct|state=PA|Toll|576|location1=[[Pittsburgh International Airport]]|road|to2=yes|Morganza Road|extra=airport}}
|notes=Southbound exit and northbound entrance; PA 576 east not signed; exit 18 on PA 576
}}
{{PAint|old
|county=Allegheny
|cspan=15
|location=Bridgeville
|mile=54.6
|old=11
|exit=54
|road={{jct|state=PA|PA|50|city1=Bridgeville}}
}}
{{PAint|old
|location=South Fayette Township
|mile=55.2
|old=12
|exit=55
|road={{jct|state=PA|PA|50|city1=Heidelberg|city2=Collier Township}}
|notes=Formerly designated as "Heidelberg / Kirwan Heights"
}}
{{PAint|old
|location=Scott Township
|ctdab=Allegheny
|mile=57.4
|old=13
|exit=57
|road=[[Carnegie, Pennsylvania|Carnegie]]
}}
{{PAint|old
|location=Pennsbury Village
|mile=59.3
|old=14
|exit=59
|road={{jct|state=PA|I|376|location1=[[Pittsburgh]]|name1={{jct|state=PA|US|22|US|30|noshield1=yes|noshield2=yes}}|extra=airport|location2=[[Pittsburgh International Airport]]}}
|notes=I-376 exit&nbsp;59; signed as exits&nbsp;59A (east) and 59B (west)
}}
{{PAint|old
|location=Robinson Township
|ctdab=Allegheny
|mile=60.4
|old=16
|exit=60
|road={{jct|state=PA|PA|60|city1=Crafton|city2=Moon Run}}
|notes=Signed as exits&nbsp;60A (south) and 60B (north) southbound
}}
{{PAint|old
|location=Coraopolis
|mile=64.1
|old=17
|exit=64
|type=incomplete
|road={{jct|state=PA|PA|51|city1=Coraopolis|city2=McKees Rocks}}
|notes=No southbound exit}}
{{jctbridge|old
|location_special=[[Ohio River]]
|bridge=[[Neville Island Bridge]]
}}
{{PAint|old
|location=Neville Township
|mile=64.8
|old=18
|exit=65
|type=concur 
|road={{jct|state=PA|Belt|Yellow|to2=To|PA|51|city1=Neville Island}}
|notes=Southern terminus of Yellow Belt concurrency
}}
{{jctbridge|old
|location_special=[[Ohio River]]
|bridge=[[Neville Island Bridge]]
}}
{{PAint|old
|location=Glenfield
|mile=66.5
|old=19
|exit=66
|road={{jct|state=PA|PA|65|city1=Emsworth|city2=Sewickley}}
}}
{{PAint|old
|location=Ohio Township
|mile=68.0
|old=20
|exit=68
|type=concur 
|road={{jct|state=PA|Belt|Yellow|name1=Mount Nebo Road}}
|notes=Northern terminus of Yellow Belt concurrency
}}
{{PAint|old
|location=Franklin Park
|lspan=2
|mile=72.1
|old=21
|exit=72
|type=incomplete
|road={{jct|state=PA|I|279|dir1=south|location1=[[Pittsburgh]]}}
|notes=Southbound exit and northbound entrance; northern terminus of I-279
}}
{{PAint|old
|mile=73.3
|old=22
|exit=73
|road={{jct|state=PA|PA|910|Belt|Orange|city1=Wexford|dir1=east}}
|notes=Western terminus of PA&nbsp;910}}
{{PAint|old
|location=Marshall Township
|lspan=2
|mile=75.7
|old=23
|exit=75
|type=incomplete
|road={{jct|state=PA|Belt|Red|US|19|to2=To|dir2=south|city1=Warrendale}}
|notes=Northbound exit and southbound entrance
}}
{{PAint|old
|mile=75.9
|old=25
|exit=76
|type=incomplete
|road={{jct|state=PA|US|19|dir1=north|location1=[[Cranberry Township, Butler County, Pennsylvania|Cranberry]]}}
|notes=Northbound left exit and southbound entrance
}}
{{PAint|old
|county=Butler
|cspan=9
|location=Cranberry Township
|ctdab=Butler
|lspan=2
|mile=77.2
|old=—
|exit=77
|type=etc
|road={{jct|state=PA|I|76|PATP|city1=Harrisburg|location2=[[Youngstown, Ohio|Youngstown OH]]}}
|notes=I-76 / Penna Turnpike exit&nbsp;28 (Cranberry)
}}
{{PAint|old
|mile=78.7
|old=25
|exit=78
|road={{jct|state=PA|PA|228|city1=Seven Fields|city2=Mars|location3=[[Cranberry Township, Butler County, Pennsylvania|Cranberry]]}}
}}
{{PAint|old
|location=Jackson Township
|ctdab=Butler
|lspan=4
|mile=83.1
|old=26
|exit=83
|type=incomplete
|road={{jct|state=PA|PA|528|city1=Evans City}}
|notes=Northbound exit and southbound entrance
}}
{{PAint|old
|mile=85.5
|old=26
|exit=85
|type=incomplete
|road={{jct|state=PA|PA|528|to1=To|name1=[[U.S. Route 19 in Pennsylvania|US&nbsp;19]] }}
|notes=Southbound exit and northbound entrance
}}
{{PAint|old
|mile=87.3
|old=27
|exit=87
|type=incomplete
|road={{jct|state=PA|PA|68|city1=Zelienople}}
|notes=Northbound exit and southbound entrance
}}
{{PAint|old
|mile=88.7
|old=27
|exit=88
|road={{jct|state=PA|US|19|PA|68|to1=To|city1=Zelienople}}
|notes=Signed as Little Creek Road northbound; promoted as access to [[Seneca Valley School District]]
}}
{{PAint|old
|location=Muddy Creek Township
|mile=95.8
|old=28
|exit=96
|road={{jct|state=PA|PA|488|city1=Portersville|city2=Prospect}}
}}
{{PAint|old
|location=Muddy Creek Township
|mile=99.6
|old=29
|exit=99
|road={{jct|state=PA|US|422|city1=New Castle|city2=Butler}}
|notes=Access to [[Moraine State Park]] and [[McConnells Mill State Park]]
}}
{{PAint|old
|location=Worth Township
|ctdab=Butler
|mile=105.4
|old=30
|exit=105
|road={{jct|state=PA|PA|108|city1=Slippery Rock}}
|notes=Access to [[Slippery Rock University of Pennsylvania]]; interchange partially located in [[Lawrence County, Pennsylvania|Lawrence County]]
}}
{{jctco|state=PA|county=Lawrence|old}}
{{PAint|old
|county=Mercer
|cspan=4
|location=Springfield Township
|ctdab=Mercer
|mile=113.7
|old=31
|exit=113
|road={{jct|state=PA|PA|208|PA|258|city1=Grove City}}
|notes=Access to [[Grove City College]] and [[Westminster College, Pennsylvania|Westminster College]]
}}
{{PAint|old
|location=Findley Township
|mile=116.5
|old=—
|exit=116
|road={{jct|state=PA|I|80|city1=Clarion|city2=Sharon}}
|notes=Signed as exits&nbsp;116A (east) and 116B (west); I-80 exit&nbsp;19
}}
{{PAint|old
|location=Jackson Township
|ctdab=Mercer
|mile=121.1
|old=33
|exit=121
|road={{jct|state=PA|US|62|city1=Mercer|city2=Franklin}}
}}
{{PAint|old
|location=New Vernon Township
|mile=130.6
|old=34
|exit=130
|road={{jct|state=PA|PA|358|city1=Greenville|city2=Sandy Lake}}
|notes=Access to [[Thiel College]]
}}
{{PAint|old
|county=Crawford
|cspan=3
|location=Greenwood Township
|ctdab=Crawford
|mile=141.5
|old=35
|exit=141
|road={{jct|state=PA|PA|285|city1=Geneva|city2=Cochranton}}
}}
{{PAint|old
|location=Vernon Township
|mile=147.4
|old=36
|exit=147
|road={{jct|state=PA|US|6|US|19|US|322|city1=Meadville|city2=Conneaut Lake}}
|notes=Signed as exits&nbsp;147A (north/east) and 147B (south/west); access to [[Conneaut Lake Park]] and [[Allegheny College]], to [[Pennsylvania Route 102|PA 102]]
}}
{{PAint|old
|location=Hayfield Township
|mile=153.9
|old=37
|exit=154
|road={{jct|state=PA|PA|198|city1=Conneautville|city2=Saegertown}}
}}
{{PAint|old
|county=Erie
|cspan=7
|location=Washington Township
|ctdab=Erie
|mile=166.5
|old=38
|exit=166
|road={{jct|state=PA|US|6N|city1=Albion|city2=Edinboro}}
|notes= Access to [[Pennsylvania Western University, Edinboro]]
}}
{{PAint|old
|location=McKean Township
|ctdab=Erie
|lspan=2
|mile=174.7
|old=39
|exit=174
|road=[[McKean, Pennsylvania|McKean]]
}}
{{PAint|old
|mile=178.6
|old=—
|exit=178
|road={{jct|state=PA|I|90|location1=[[Buffalo, New York|Buffalo]]|location2=[[Cleveland]]}}
|notes=Signed as exits&nbsp;178A (east) and 178B (west); I-90 exits&nbsp;22; former southern terminus of I-179
}}
{{PAint|old
|location=Millcreek Township
|ctdab=Erie
|mile=180.5
|old=41
|exit=180
|road={{jct|state=PA|US|19|to1=To|location1=Kearsarge}}
|notes=Access to [[Millcreek Mall]] and [[Pennsylvania Route 99|PA&nbsp;99]]
}}
{{PAint|old
|location=Erie
|lspan=3
|mile=182.7
|old=43
|exit=182
|road={{jct|state=PA|US|20|name1=26th Street|extra=airport}}
|notes=Access to [[Erie International Airport]]
}}
{{PAint|old
|mile=183.6
|old=44
|exit=183
|type=incomplete
|road={{jct|state=PA|PA|5|PA|290|dir2=east|name2=12th Street}}
|notes=Northbound exit and southbound entrance; signed as exits&nbsp;183A (east) and 183B (west); access to [[Presque Isle State Park]], [[Waldameer Park]], and [[Gannon University]]; western terminus of PA&nbsp;290
}}
{{PAint|old
|mile=183.8
|old=—
|exit=—
|road=[[Bayfront Parkway]] / Lincoln Avenue
|notes=Northern terminus; [[at-grade intersection]]; former northern terminus of I-179
}}
{{jctbtm|col=9|keys=concur,incomplete}}

==Auxiliary routes==
*[[Interstate 179|I-179]] was a spur from [[Interstate 90|I-90]] north to Erie, now absorbed into I-79
*[[Interstate 279|I-279]] heads southeast from I-79 in [[Pittsburgh]]'s northern suburbs to [[Interstate 376|I-376]] in [[Downtown Pittsburgh]].
*[[Interstate 579|I-579]] heads south from I-279 in Pittsburgh's [[North Side (Pittsburgh)|North Side]] to the [[Liberty Bridge (Pittsburgh)|Liberty Bridge]] and the [[Boulevard of the Allies]] just east of Downtown Pittsburgh.

==See also==
*{{Portal-inline|U.S. Roads}}
*{{Portal-inline|Pennsylvania}}

==References==
{{Reflist}}

==External links==
{{Commons category|Interstate 79}}
{{AttachedKML|display=title,inline}}
* [https://www.aaroads.com/interstate-guide/i-079/ Interstate Guide – I-79]
* [https://www.aaroads.com/guides/i-079-wv/ I-79 in West Virginia at AARoads.com]
* [https://www.aaroads.com/guides/i-079-pa/ I-79 in Pennsylvania at AARoads.com]
* [https://www.pahighways.com/interstates/I79.html Pennsylvania Highways: I-79]
* [https://www.alpsroads.net/roads/wv/i-79/ West Virginia Roads - I-79]
* [https://www.alpsroads.net/roads/pa/i-79/ Pennsylvania Roads - I-79]
* [https://news.google.com/newspapers?id=yBwcAAAAIBAJ&sjid=jlAEAAAAIBAJ&pg=6666%2C363006 1971 Pittsburgh Press article detailing I-79 progress]
* {{OSM relation|899037}}

{{interstates}}
{{I-79 aux}}
{{Pennsylvania Turnpike Commission}}
{{Authority control}}

[[Category:Interstate 79| ]]
[[Category:Interstate Highway System|79]]
[[Category:Interstate Highways in Pennsylvania|79]]
[[Category:Interstate Highways in West Virginia|79]]
[[Category:Charleston, West Virginia]]
[[Category:Transportation in Kanawha County, West Virginia]]
[[Category:Transportation in Roane County, West Virginia]]
[[Category:Transportation in Clay County, West Virginia]]
[[Category:Transportation in Braxton County, West Virginia]]
[[Category:Transportation in Gilmer County, West Virginia]]
[[Category:Transportation in Lewis County, West Virginia]]
[[Category:Transportation in Harrison County, West Virginia]]
[[Category:Transportation in Marion County, West Virginia]]
[[Category:Transportation in Monongalia County, West Virginia]]
[[Category:Transportation in Greene County, Pennsylvania]]
[[Category:Transportation in Washington County, Pennsylvania]]
[[Category:Transportation in Allegheny County, Pennsylvania]]
[[Category:Transportation in Butler County, Pennsylvania]]
[[Category:Transportation in Lawrence County, Pennsylvania]]
[[Category:Transportation in Mercer County, Pennsylvania]]
[[Category:Transportation in Crawford County, Pennsylvania]]
[[Category:Transportation in Erie County, Pennsylvania]]