Ohio State Route 170

State Route 170
Route information
	Maintained by ODOT
Length	36.64 mi[1] (58.97 km)
Existed	1924–present
Major junctions
South end	US 30 / SR 7 / SR 11 near Calcutta
	I-680 in Youngstown
North end	US 62 in Youngstown
Location
Counties	Columbiana, Mahoning
Highway system

State Route 170 (SR 170) is a north–south running state route located in Mahoning and Columbiana counties in northeast Ohio. It runs within a few miles of the Pennsylvania border for much of its route as it passes through the eastern parts of the two counties. The southern terminus is at an interchange with U.S. 30, State Route 7, and State Route 11 near Calcutta, and the northern at U.S. 62 in Youngstown. ODOT extended the northern terminus from the previous point of Interstate 680, changing signs on July 16 and 17, 2008.[2]

Intersection with State Route 154 in Negley

History

1924 – Original state highway.[3]
1924 – Originally routed from East Palestine to Petersburg.[3]
1931 – Extended to East Liverpool along previous unnumbered road.[3]
1962 – Extended to 1-mile (1.6 km) north of North Kingsville along previous route 90.[3]
1970 – Truncated at 3 miles (4.8 km) north of Poland.[3]
2008 – Extended 3 miles (4.8 km) to U.S. 62 in Youngstown along the former Route 625.[2][4]

Major junctions

County	Location	mi	km	Destinations	Notes
Columbiana	Calcutta	0.00	0.00	US 30 / SR 7 / SR 11 / Substation Road	Interchange
	Negley	11.18	17.99	SR 154 east – Beaver Falls, PA	Southern end of SR 154 concurrency
	Negley	11.24	18.09	SR 154 west – Lisbon	Northern end of SR 154 concurrency
	East Palestine	14.57	23.45	SR 46 north / SR 558 west (Main Street)	Southern terminus of SR 46; eastern terminus of SR 558
	East Palestine	14.82	23.85	SR 165 east (Taggart Street)	Southern end of SR 165 concurrency
	Unity Township	16.70	26.88	SR 14 east / North Market Street	Southern end of SR 14 concurrency
	Unity Township	17.24	27.75	SR 14 west / SR 165 west / Brookdale Avenue – Columbiana	Northern end of SR 14 / SR 165 concurrency
Mahoning	Petersburg	21.23	34.17	SR 617 west (Garfield Road)	Southern end of SR 617 concurrency
	Petersburg	21.32	34.31	SR 617 east (Youngstown-Pittsburgh Road) / CR 8 (East Garfield Road)	Northern end of SR 617 concurrency
	New Middletown	26.04	41.91	SR 630 east / CR 30 (East Calla Road)	Western terminus of SR 630
	Poland	30.33	48.81	SR 616 north (Water Street)	Southern terminus of SR 616
	Poland	30.39	48.91	US 224 (Center Road)
	Youngstown	33.55	53.99	I-680 – Youngstown, Pittsburgh	Exit 9 (I-680)
		35.33	56.86	SR 7 (Market Street)
		36.64	58.97	US 62 (Canfield Road / Glenwood Avenue)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus

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References

Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved April 30, 2010.
"Sign work, I-680 restrictions to be done today". The Vindicator. 2008-07-17. Retrieved 2009-05-12.
Route 170 by John Simpson Archived March 7, 2008, at the Wayback Machine
"ODOT SLD: Mahoning County 2008 Updates". Ohio Department of Transportation. January 1, 2008. Retrieved 2009-02-18.

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[sld-1] Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved April 30, 2010.

[vindy-2] "Sign work, I-680 restrictions to be done today". The Vindicator. 2008-07-17. Retrieved 2009-05-12.

[system-3] Route 170 by John Simpson Archived March 7, 2008, at the Wayback Machine

[SLD2008Changes-4] "ODOT SLD: Mahoning County 2008 Updates". Ohio Department of Transportation. January 1, 2008. Retrieved 2009-02-18.