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]

State Route 170 marker
State Route 170
Route information
Maintained by ODOT
Length36.64 mi[1] (58.97 km)
Existed1924–present
Major junctions
South end US 30 / SR 7 / SR 11 near Calcutta
Major intersections
North end US 62 in Youngstown
Location
CountryUnited States
StateOhio
CountiesColumbiana, Mahoning
Highway system
  • Ohio State Highway System
SR 169 SR 171
Intersection with State Route 154 in Negley

History

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In 1924, it became the original state highway where it routed from East Palestine to Petersburg. In 1931 the highway extended to East Liverpool along a previously unnumbered road. Later in 1962 it was extended to 1-mile (1.6 km) north of North Kingsville along previous route 90. The road was truncated at 3 miles (4.8 km) north of Poland in 1970.[3] In 2008, it extended 3 miles (4.8 km) to U.S. 62 in Youngstown along the former Route 625.[2][4]

Major junctions

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CountyLocationmikmDestinationsNotes
ColumbianaCalcutta0.000.00    US 30 / SR 7 / SR 11 / Substation RoadInterchange
Negley11.1817.99 
 
SR 154 east – Beaver Falls, PA
Southern end of SR 154 concurrency
11.2418.09 
 
SR 154 west – Lisbon
Northern end of SR 154 concurrency
East Palestine14.5723.45 
 
 
 
SR 46 north / SR 558 west (Main Street)
Southern terminus of SR 46; eastern terminus of SR 558
14.8223.85 
 
SR 165 east (Taggart Street)
Southern end of SR 165 concurrency
Unity Township16.7026.88 
 
SR 14 east / North Market Street
Southern end of SR 14 concurrency
17.2427.75 
 
 
 
SR 14 west / SR 165 west / Brookdale Avenue – Columbiana
Northern end of SR 14 / SR 165 concurrency
MahoningPetersburg21.2334.17 
 
SR 617 west (Garfield Road)
Southern end of SR 617 concurrency
21.3234.31 
 
  SR 617 east (Youngstown-Pittsburgh Road) / CR 8 (East Garfield Road)
Northern end of SR 617 concurrency
New Middletown26.0441.91 
 
  SR 630 east / CR 30 (East Calla Road)
Western terminus of SR 630
Poland30.3348.81 
 
SR 616 north (Water Street)
Southern terminus of SR 616
30.3948.91  US 224 (Center Road)
Youngstown33.5553.99  I-680 – Youngstown, PittsburghExit 9 (I-680)
35.3356.86  SR 7 (Market Street)
36.6458.97  US 62 (Canfield Road / Glenwood Avenue)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

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KML is from Wikidata
  1. ^ Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved April 30, 2010.
  2. ^ a b "Sign work, I-680 restrictions to be done today". The Vindicator. 2008-07-17. Retrieved 2009-05-12.
  3. ^ Route 170 by John Simpson[unreliable source] Archived March 7, 2008, at the Wayback Machine
  4. ^ "ODOT SLD: Mahoning County 2008 Updates". Ohio Department of Transportation. January 1, 2008. Retrieved 2009-02-18.[permanent dead link]