Interstate 70 in Pennsylvania

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Interstate 70 Main route of the Interstate Highway System
Length:	167.92 mi[1] (270.24 km)
West end:	I-70 at the West Virginia state line
Major junctions:	I-79 in Washington PA 43 in Fallowfield Twp I-76 in New Stanton
East end:	I-70 at the Maryland state line
Pennsylvania State Routes < PA 69 PA 70 > Legislative

Interstate 70 runs east-west across the southwest part of the U.S. state of Pennsylvania. About half of the route is concurrent with Interstate 76 along the Pennsylvania Turnpike. I-70 is one of only a few Interstate Highways to have a traffic signal - in this case, with U.S. Route 30 at Breezewood, where it leaves the Turnpike and heads south towards Maryland. The portion of I-70 between Washington, Pennsylvania and New Stanton, Pennsylvania falls well below interstate highway standards.

I-70 crosses the Monongahela River on the Belle Vernon Bridge and the Youghiogheny River on the Smithton High Level Bridge.

[edit] 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.^[2] In 1957, preliminary numbers were assigned; the longer route via Pittsburgh (now Interstate 79, Interstate 279 and Interstate 376) became the main line of I-70, while the southern bypass (now I-70) became Interstate 70S.^[3] 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), AASHO 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.^[4] This brought the routing of I-70 to its present form.

[edit] Exit list

County	Municipality	SR	#		Destinations	Notes
			Old
Interstate 70 continues into Ohio
Washington	Donegal Township	8002	1	1	West Alexander (State Route 3023)
		8006	2	6	Pennsylvania Route 231 - Claysville (State Route 3024)
	Buffalo Township	8008	3	11	Pennsylvania Route 221 - Taylorstown (State Route 3008; State Route 3030)
	North Franklin Township	8010	4	15	U.S. Route 40 - Chestnut Street
	Canton Township	8012	5	16	Jessop Place (State Route 4030)
	Washington	8014	6	17	Pennsylvania Route 18 - Jefferson Avenue (State Route 4032)
	South Strabane Township	8016		18	Interstate 79 north - Pittsburgh	I-79 joins eastbound and splits westbound
		8018	7	19	U.S. Route 19 - Murtland Avenue	split into 19A and 19B
		8020	8	20	Pennsylvania Route 136 - Beau Street (State Route 1014)
		8011		21	Interstate 79 south - Morgantown, WV	I-79 joins westbound and splits eastbound
	Somerset Township	8022	9	25	Pennsylvania Route 519 - Eighty Four; Glyde
		8024	10	27	Dunningsville (State Route 1055; State Route 2017)
		8026	11	31	Kammerer (State Route 1093)
		8028	12A	32A	Pennsylvania Route 917 - Ginger Hill
	Bentleyville	8030	12B	32B	to Pennsylvania Route 917 south - Bentleyville (State Route 2040; State Route 2044)
	Fallowfield Township	8032	13	35	Pennsylvania Route 481 - Monongahela; Centerville
		8034	14	36	Lover (State Route 2037)	westbound exit and eastbound entrance
		8044	15	37	Pennsylvania Route 43 - California; Pittsburgh	split into 37A and 37B
	Speers	8036	16	39	Speers (State Route 2027)
		8052	17	40	Pennsylvania Route 88 - Charleroi; Allenport
Westmoreland	Rostraver Township	8014	18	41	Pennsylvania Route 906 - Belle Vernon; Monessen
	North Belle Vernon	8016	19	42	North Belle Vernon (State Route 3007)
	Rostraver Township	9103	19A	42A	Monessen (State Route 3003)	westbound exit and eastbound entrance
		8018 8020	20	43	Pennsylvania Route 201 to Pennsylvania Route 837 - Donora; Fayette City (to State Route 3013)	split into 43A and 43B westbound
		8022	21	44	Arnold City (State Route 3011)
		8024	22	46	Pennsylvania Route 51 - Uniontown, Pittsburgh	split into 46A and 46B
	South Huntingdon Township	8026	23	49	Smithton (State Route 3031; State Route 3059)
		8028	24	51	Pennsylvania Route 31 - Mt. Pleasant; West Newton (State Route 3061)	split into 51A and 51B
		8030	25	53	Yukon (State Route 3010)
	Sewickley Township	8032	25A	54	Madison (State Route 3014; State Route 3037)
	New Stanton	8034	26A	57A	Hunker (State Route 3089)	westbound exit and eastbound entrance
		8034	26B	57B	New Stanton (State Route 3093)	Exit 57 eastbound
		8036		58 75	Interstate 76 (Pennsylvania Turnpike) - Pittsburgh; Harrisburg	Continue straight for PA 66/US 119 - Delmont, Greensburg. New Stanton Exit on the PA Turnpike
Toll Plaza
joins follows exit numbers
Westmoreland	Donegal		9	91	Route 31 to Route 711 - Ligonier, Uniontown
Somerset	Somerset		10	110	Route 601 to US 219 - Johnstown, Somerset
Bedford	Bedford		11	146	US 220 Business to Interstate 99/US 220
	East Providence Twp		12	161	Eastbound US 30 to Interstate 70 east - Baltimore, Washington, DC	I-70 joins US 30 briefly
					Westbound Interstate 76 (Pennsylvania Turnpike) - Philadelphia, Harrisburg
Toll Plaza
separates from
Bedford	East Providence Twp		28	147	US 30 east - Breezewood, PA	US 30 is at-grade with I-70; follow east to
Fulton		8001	29	149	South Breezewood; to U.S. Route 30 west - Everett (State Route 2035)	no westbound entrance
	Brush Creek Twp	8014	30	151	Pennsylvania Route 915 - Crystal Spring (State Route 3017; State Route 3023)
		8008	31	156	Pennsylvania Route 643 - Town Hill (State Route 3017)
	Union Twp	8006	32	163	Pennsylvania Route 731 south - Amaranth (State Route 3007)
	Bethel Twp	8004	33	168	U.S. Route 522 north - Warfordsville (State Route 3014)	US 522 joins eastbound and leaves westbound
Interstate 70 and US 522 continue into Maryland

[edit] References

1. ^ Route Log - Main Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 1
2. ^ National System of Interstate Highways, August 2, 1947
3. ^ Official Route Numbering for the National System of Interstate and Defense Highways, August 14, 1957
4. ^ Ask the Rambler, Was I-76 Numbered to Honor Philadelphia for Independence Day, 1776?