Interstate 70 in Pennsylvania

Interstate 70
Wikimedia | © OpenStreetMap I-70 highlighted in red
Route information
Maintained by PennDOT and PTC
Length	167.92 mi[1] (270.24 km)
Major junctions
West end	I-70 at the West Virginia state line
	I-79 / US 40 / US 19 / PA 18 in Washington PA Turnpike 43 in Fallowfield Township PA 51 in Rostraver Township I-76 Toll / Penna Turnpike / US 119 / PA Turnpike 66 in New Stanton US 219 near Somerset I-99 / US 30 / US 220 in Bedford I-76 Toll / Penna Turnpike / US 30 in Breezewood US 522 near Warfordsburg
East end	I-70 / US 522 at the Maryland state line
Location
Counties	Washington, Westmoreland, Somerset, Bedford, Fulton
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Pennsylvania State Route System Interstate US State Scenic Byways Legislative ← PA 69 → PA 70 ← PA 125 PA 126 → PA 127

In the U.S. state of Pennsylvania, Interstate 70 (I-70) runs east–west across the southwest part of the state serving the southern fringe of the Pittsburgh metropolitan area. About half of the route is concurrent with I-76 on the Pennsylvania Turnpike. This is the oldest segment of I-70 in Pennsylvania, having been completed in 1940, and is only one of two segments of I-70 that are tolled, with the other being the Kansas Turnpike. I-70 is one of only a few Interstate Highways to have a traffic signal—in this case, with U.S. Route 30 (US 30) in Breezewood, where it leaves the Pennsylvania Turnpike and heads toward Maryland.^[2]

Route description[]

Two segments of I-70 in Pennsylvania are not designed to modern Interstate standards: a 37-mile segment from Washington to New Stanton, and the aforementioned half-mile signalized segment in Breezewood.

West Virginia to Washington[]

I-70 enters Pennsylvania from West Virginia, coming into Donegal Township, Washington County. The highway continues northeast as a four-lane freeway with a standard-sized median up to Interstate Highway standards through rural areas of woodland and farmland, coming to its first junction at a partial cloverleaf interchange with (PA 3023), to the southeast of unincorporated village of West Alexander. Past this junction, the freeway begins to parallel US 40 on the northwest side of the road, before it enters a series of winding curves. From here, I-70 heads east to meet a weigh station and a welcome center in the eastbound direction, as well as an interchange with connecting to PA 231 via US 40 in the borough of Claysville.^[3]

I-70 through Buffalo Township in Washington County

The freeway curves to a more east-northeasterly direction, where it briefly passes through the borough limits of Claysville, before briefly re-entering Donegal Township. I-70 enters Buffalo Township, where it soon meets a pair of right-in/right-out ramps connecting to PA 221, that serves the unincorporated village of Taylorstown to the northeast, in adjacent Blaine Township. The freeway comes into North Franklin Township before crossing into Canton Township at its partial interchange with US 40 which lacks a westbound entrance; the interchange is adjacent to the Washington Crown Center shopping mall located to the southwest of the interchange. From here, I-70 crosses over an abandoned portion of the Allegheny Valley Railroad's W&P Subdivision line, and enters mixed areas of development on the outskirts of the city of Washington, which is also the county seat of Washington County. After passing through an interchange with Sheffield Avenue serving the industrial and commercial area of , the freeway enters the city limits of Washington, where it comes to a pair of right-in/right-out ramps that connect to PA 18. A short distance later, I-70 enters South Strabane Township and reaches its western junction with I-79 at a directional interchange, which heads north towards the city of Pittsburgh.^[3]

I-70 (on top) merges with I-79 going through Washington, Pennsylvania, shown in 2008 before reconstruction and flyover construction

The freeway turns southeast through the interchange and begins a concurrency with I-79. A jersey barrier takes over in the highway's median as it comes to a diverging diamond interchange with US 19 in a commercial area surrounded by strip malls. A short distance later, I-70/I-79 comes to a partial cloverleaf interchange with PA 136 to the northeast of the borough limits of East Washington, that provides access to Washington & Jefferson College; a park and ride lot is located in the northeastern corner of the interchange. Past PA 136, the freeway heads back into rural areas with scattered residences, before reaching the eastern split between I-70 and I-79 at a directional interchange. I-79 turns south towards the city of Morgantown, West Virginia, while I-70 continues east along the original roadway towards the borough of New Stanton in Westmoreland County.^[3]

Washington to New Stanton[]

East of I-79, I-70 downgrades to an expressway substandard of modern Interstate standards. This section of I-70 (old I-70S) has several dated design features. The median narrows to the point that there are no shoulders between the median barrier and the passing lanes on both sides. On- and off-ramps at many of the interchanges are substandard in both length and geometry, which requires vehicles to decelerate in the travel lanes before entering the off-ramps, and also necessitates the use of stop signs on the on-ramps instead of yield signs. Several overpasses do not meet minimum clearance requirements, which has resulted in damage to, and from, overheight trucks. Total reconstruction efforts are ongoing that will upgrade most of this segment of I-70 and its interchanges to modern Interstate standards, and various projects are scheduled through the early 2020s.^{[citation needed]}

The first interchange that the freeway meets past I-79 is with PA 519, where the route crosses into Somerset Township. I-70 continues through areas of rural farmland with surroundings of wooded rolling hills, and turns to the east-southeast, coming to interchanges with south of the hamlet of , and McIllvaine Road southeast of the hamlet of , in adjacent Nottingham Township, before reaching the borough limits of Bentleyville at the PA 917 interchange, which only contains an eastbound exit and westbound entrance. Shortly afterward, the expressway crosses over Norfolk Southern Railway's and meets modified right-in/right-out ramps to Wilson Road, which provides complete access to PA 917 and the center of Bentleyville to and from both directions. Following Bentleyville, I-70 enters Fallowfield Township, where it has a complete diamond interchange with PA 481, a westbound exit and eastbound entrance to Twin Bridges Road to the northeast of the hamlet of Lover, and a full cloverleaf interchange with the Mon–Fayette Expressway (PA 43), as the route descends into the valley of the Monongahela River. From here, the expressway curves east-northeast into the borough of Twilight, before crossing into the borough of Speers at the interchange with Maple Drive/Twilight Hollow Road. At this point, I-70 meets PA 88 at a pair of right-in/right-out ramps, prior to crossing over the Monongahela River, as well Norfolk Southern Railway's Mon Line and CSX Transportation's Mon Subdivision on the Belle Vernon Bridge, where the route leaves both Speers and Washington County.^[3]

Beyond the Belle Vernon Bridge, the route enters Westmoreland County within Rostraver Township. Here, it has a partial cloverleaf interchange with PA 906, before it crosses into the borough of North Belle Vernon and interchanges with Fayette Street, to the northeast of the borough center. From this point, the expressway heads back into Rostraver Township where it meets PA 201 at a partial cloverleaf interchange northeast of the community of Lynnwood-Pricedale that also provides access to PA 837. I-70 continues through wooded areas with nearby development, reaching an interchange with north of the hamlet of Arnold City in adjacent Washington Township, Fayette County, before coming to a cloverleaf interchange with PA 51 as the route begins to enter the valley of the Youghiogheny River. Past PA 51, the route crosses the Smithton High Level Bridge over the Youghiogheny River and CSX Transportation's Keystone Subdivision, where it enters South Huntingdon Township. From here, I-70 interchanges with north of the borough of Smithton, PA 31 at cloverleaf to the northwest of the Pittsburgh Renaissance Festival grounds, and to the southeast of the unincorporated village of Yukon, before it comes into Sewickley Township. In this area, the expressway has an interchange with Waltz Mill Road to the south of the borough of Madison, before it passes through Hempfield Township prior to entering New Stanton. Within the borough limits, I-70 has a dumbbell interchange with , before it exits the mainline expressway at a trumpet interchange, to come to a toll plaza for the New Stanton interchange on the Pennsylvania Turnpike (I-76). At this point, the mainline expressway continues east to a cloverleaf junction between US 119 and the southern terminus of PA 66. I-70 itself passes through the toll plaza and comes to another trumpet interchange, where the Interstate merges onto the eastbound turnpike that heads toward the city of Harrisburg, the state capital of Pennsylvania. In the opposite direction, the Pennsylvania Turnpike heads northwest towards Pittsburgh, then becomes the Ohio Turnpike, which continues towards Cleveland.^[3]

Pennsylvania Turnpike concurrency[]

For 86 miles from New Stanton to Breezewood, I-70 shares a concurrency with I-76 along the Pennsylvania Turnpike. I-70 passes through a wind farm in Somerset County, and close to the 9/11 Flight 93 National Memorial in Shanksville. It then has an indirect connection to I-99 in Bedford County before reaching the eastern end of its concurrency with the Turnpike in Breezewood.^[3]

Breezewood to Maryland[]

View east along the non-freeway portion of I-70 and west along US 30 in Breezewood

I-70 splits from the Pennsylvania Turnpike at the Breezewood Interchange in East Providence Township, Bedford County. The turnpike continues east towards Harrisburg and Philadelphia, while I-70 passes through another toll plaza and passes under its own carriageways, before downgrading into another highway substandard of Interstate standards, at a partial trumpet interchange with US 30. Eastbound I-70 merges onto westbound US 30 to form a half-mile wrong-way concurrency through the community of Breezewood. This section of I-70 is one of the few instances of where an Interstate highway follows a road that lacks grade separation and includes traffic signals. I-70 follows US 30 west along a five-lane highway with a center turn lane through commercial areas in Breezewood before it splits from US 30 and turns left onto another freeway alignment. US 30, meanwhile, continues west towards the borough of Everett.^[3]

Beyond US 30, I-70 heads south and becomes a four-lane limited-access freeway that once again conforms to modern Interstate standards. The median widens, before the freeway crosses over its preceding carriageways and under the Pennsylvania Turnpike. Shortly past the turnpike underpass, there is an interchange with South Breezewood Road before I-70 reverse curves to cross Rays Hill, crossing into Fulton County, and coming to a pair of right-in/right-out ramps with the southern terminus of PA 915 in the unincorporated village of Crystal Spring, in Brush Creek Township. The freeway continues through a valley of farmland and comes to an eastbound rest area on the western slope of Town Hill, which the highway crosses at an oblique angle. In the middle of the mountain crossing, I-70 has another pair of right-in/right-out ramps with the northern terminus of PA 643, and then descends along the length of its eastern slope into another rural valley. Within this valley, the freeway enters Union Township, turns generally more southeast and interchanges with the northern terminus of PA 731, east of the unincorporated village of .^[3]

Past PA 731, I-70 crosses Sideling Hill and comes into Bethel Township. The route heads through forested and mountainous surroundings in the watershed of Tonoloway Creek, before coming to an interchange with the northern/western end of the highway's concurrency with US 522 in the unincorporated town of Warfordsburg. Southbound US 522 merges onto eastbound I-70 and the two routes run concurrent across the Mason-Dixon line into Washington County, Maryland.^[3]

History[]

By 1947, present Interstate 70 across Pennsylvania was included in the planned Interstate Highway System. The route from West Virginia split at Washington, with one branch heading northeast to meet the Pennsylvania Turnpike near Pittsburgh and the other heading east, bypassing Pittsburgh to the south (via a planned bypass of Pennsylvania Route 71) to the New Stanton interchange. The piece south from the Breezewood interchange into Maryland was also in the network.^[4] The route between US 30 in Breezewood and US 522 in Warfordsburg was originally known as Pennsylvania Route 126. In 1957, preliminary numbers were assigned; the longer route via Pittsburgh (now Interstate 79 and Interstate 376) became the main line of I-70, while the southern bypass (now I-70) became Interstate 70S.^[5] The section of present-day I-70 between PA 519 near Washington and New Stanton was built as a four-lane divided highway known as the "Express Highway"; this road was assigned the temporary PA 71 Alternate designation in 1957 and would be designated as I-70S following the completion of additional connecting roads in the Interstate Highway System.^[6][7] On July 15, 1960, I-70 was designated onto the Penn-Lincoln Parkway.^[8] A southern extension of Interstate 79 (which had previously only run from Erie south to Pittsburgh) to Charleston, West Virginia in 1963 resulted in changes to I-70. On February 26, 1964, as part of the formation of Interstate 76 (east of downtown Pittsburgh), AASHTO approved a rerouting of I-70 along I-70S. The former I-70 became I-79 from Washington to downtown Pittsburgh and I-76 to and along the Turnpike to New Stanton.^[9] This brought the routing of I-70 to its present form.

Future[]

In 2011, PennDOT began preliminary work for a total reconstruction of I-70 between the West Virginia state line and New Stanton. Approximately $500 million will be spent on this 58-mile segment of highway in order to improve it to modern Interstate standards, half of which will be spent redesigning eight interchanges. Other planned improvements include six overpass replacements, a new roadbed, a wider median, electronic ITS signage, and widening the I-70/I-79 concurrency in Washington to six lanes.^[10]

Two noteworthy interchange projects will occur in conjunction with the I-70/I-79 widening. Underway is a reconfiguration of the east/south split between I-70 and I-79, which will eliminate the one-lane, low-speed loop ramp from I-79 northbound to I-70 westbound, replacing it with a two-lane, high-speed flyover ramp.^[11] Preliminary design work has also been completed for a redesigned interchange between I-70/I-79 and Murtland Avenue (U.S. 19), and involves replacing the existing substandard cloverleaf in favor of the first diverging diamond interchange in Pennsylvania.^[12]

Exit list[]

County	Location[13]	mi[14]	km	Old exit [15]	New exit [15]	Destinations	Notes
Washington	Donegal Township	0.000	0.000	–	–	I-70 west – Wheeling	Continuation into West Virginia
		0.776	1.249	1	1	West Alexander
		5.648	9.090	2	6	To PA 231 – Claysville
	Buffalo Township	10.964	17.645	3	11	PA 221 – Taylorstown
	North Franklin–Canton township line	14.940	24.044	4	15	US 40 (Chestnut Street)
	Canton Township	16.027	25.793	5	16	Jessop Place
	Washington	16.451	26.475	6	17	PA 18 (Jefferson Avenue)
	South Strabane Township	17.546	28.238	–	18	I-79 north – Pittsburgh	Western end of I-79 overlap; exit 38 southbound
		18.597	29.929	7	19	US 19 (Murtland Avenue)	Diverging diamond interchange
		18.945	30.489	8	20	PA 136 (Beau Street)
		21.083	33.930	–	21	I-79 south – Morgantown	Eastern end of I-79 overlap; exit 34 northbound; also signed for Waynesburg
	Somerset Township	24.643	39.659	9	25	PA 519 – Eighty Four, Glyde
		27.503	44.262	10	27
		30.592	49.233	11	31
	Somerset Township–Bentleyville line	32.421	52.177	12A	32A	PA 917 – Ginger Hill	Eastbound exit and westbound entrance
	Bentleyville–Fallowfield Township line	32.780	52.754	12B	32B	To PA 917 – Bentleyville	Also signed for Ginger Hill at westbound exit
	Fallowfield Township	35.201	56.651	13	35	PA 481 – Monongahela, Centerville
		36.396	58.574	14	36	Lover	Westbound exit and eastbound entrance
		37.555– 37.571	60.439– 60.465	15A	37A	PA Turnpike 43 south – California	Brownsville posted on supplemental signage; E-ZPass or toll-by-plate
				15B	37B	PA Turnpike 43 north – Pittsburgh	E-ZPass or toll-by-plate
	Twilight–Speers line	39.877	64.176	16	39	Speers
	Speers	40.248	64.773	17	40	PA 88 – Charleroi, Allenport
Monongahela River		40.697	65.495	Belle Vernon Bridge
Westmoreland	Rostraver Township	40.776	65.623	18	41	PA 906 – Belle Vernon, Monessen	The eastbound exit and entrance ramps are located partially within the limits of Belle Vernon in Fayette County
	North Belle Vernon	41.528	66.833	19	42	North Belle Vernon
	Rostraver Township	42.083	67.726	19A	42A	Monessen	Westbound exit only
		42.742	68.787	20	43	PA 201 to PA 837 – Donora, Fayette City	Signed as exits 43A (south) and 43B (north) westbound
		44.216	71.159	21	44	Arnold City
		46.478	74.799	22A	46A	PA 51 south – Uniontown
				22B	46B	PA 51 north – Pittsburgh
	South Huntingdon Township	48.957	78.789	23	49	Smithton
		51.257	82.490	24A	51A	PA 31 east – Mount Pleasant
				24B	51B	PA 31 west – West Newton
		53.203	85.622	25	53	Yukon
	Sewickley Township	53.923	86.781	25A	54	Madison
	New Stanton	56.978	91.697	26A & 26B	57	New Stanton	Rebuilt interchange combining former exits 57B (Hunker) and 57A (New Stanton)
		57.564	92.640	–	–	US 119 / PA Turnpike 66 north – Greensburg, Connellsville, Delmont	I-70 exits via exit 58 to toll plaza eastbound; Delmont not signed eastbound
		57.765	92.964	Western end of toll road (E-ZPass or toll-by-plate)
		57.992	93.329	–	–	I-76 Toll west / Penna Turnpike west – Pittsburgh, Cleveland	Western end of I-76/Penna. Tpk. overlap; I-70 exits turnpike via exit 75 westbound; New Stanton Interchange
	Donegal	73.292	117.952	9	91	PA 31 / PA 711 – Ligonier, Uniontown	Donegal Interchange
Somerset	Somerset Township	92.512	148.884	10	110	US 219 – Somerset, Johnstown	Access via PA 601; Somerset Interchange
	Berlin	105.302– 106.502	169.467– 171.398	Allegheny Mountain Tunnel
Bedford	Bedford Township	128.102	206.160	11	146	I-99 / US 220 – Bedford, Altoona, Johnstown	Access via US 220 Bus.; Bedford signed eastbound; Johnstown signed westbound; Bedford Interchange
	East Providence Township	144.102	231.910	–	–	I-76 Toll east / Penna Turnpike east – Harrisburg, Philadelphia	Eastern end of I-76/Penna. Tpk. overlap; I-70 exits turnpike via exit 161 eastbound; Breezewood Interchange
		144.402	232.392	Eastern end of toll road (E-ZPass or toll-by-plate)
		146.706	236.100	Western end of at-grade section
				–	–	US 30 east – McConnellsburg, Chambersburg, Gettysburg	Eastern end of US 30 overlap; McConnellsburg signed westbound, Chambersburg and Gettysburg signed eastbound
		147.000	236.574	–	–	US 30 west – Breezewood, Everett	Western end of US 30 overlap
				Eastern end of at-grade section
		148.465	238.931	29	149	South Breezewood	No westbound entrance
Fulton	Brush Creek Township	150.948	242.927	30	151	PA 915 – Crystal Spring
		155.510	250.269	31	156	PA 643 –
	Union Township	163.007	262.334	32	163	PA 731 south –
	Bethel Township	167.724	269.926	33	168	US 522 north – Warfordsburg	Western end of US 522 overlap
		170.281	274.041	–	–	I-70 east / US 522 south – Hancock	Continuation into Maryland
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Electronic toll collection       Incomplete access

See also[]

•  U.S. Roads portal
•  Pennsylvania portal

References[]

External links[]

Route map:

Interstate 70
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