Ohio State Route 170
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]
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| 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 | ||||
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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 | |
| 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 | |
| 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 | |
| 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 |
| 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 | |
| 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
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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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