Interstate 670 (Ohio)

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Interstate 670 marker

Interstate 670
Route information
Auxiliary route of I-70
Maintained by ODOT
Length: 10.43 mi[1] (16.79 km)
Existed: 1975 (by FHWA), 1976 (by ODOT),[citation needed], signed 1995, completed 2003 – present
Major junctions
West end: I-70 in Columbus
  I-71 in Columbus
East end: I-270 / US 62 near Gahanna
Highway system
SR 669 SR 670
View westbound at High Street

Interstate 670 (I-670) is an Interstate Highway in the U.S. state of Ohio that passes through downtown Columbus, connecting I-70 west of downtown with I-270 and US 62 near the eastern suburb of Gahanna. I-670 provides access to John Glenn Columbus International Airport, and intersects SR 315 and I-71 downtown. The section between SR 315 and I-71 is commonly referred to by locals as the "North Innerbelt", with the rest of the innerbelt consisting of SR 315 (west), I-70 (south), and I-71 (east and south).


In the late 1970s, the Ohio Department of Transportation was unable to complete the Spring-Sandusky interchange, linking both sections of the highway, due to budget shortfalls and environmental regulations, leaving I-670 the only uncompleted Interstate in Ohio. Two decades passed before work began on the last remaining section, bridging the gap between the two completed sections. Work on this section also included the High Street cap, a cut-and-cover bridge over the highway featuring shops and restaurants. I-670 was finally completed in 2003.[2]

Route description[edit]

West of I-71, I-670 passes around both sides of Fort Hayes with two two-way roadways. The south roadway carries the eastbound main lanes and the westbound entrance ramps from I-71 north and SR 3 (Cleveland Avenue), while the north roadway carries the westbound main lanes and the eastbound entrance from US 23 north (4th Street) and High Street.

Exit list[edit]

The entire route is in Franklin County.

Location mi[1] km Exit Destinations Notes
Columbus 0.00 0.00 I-70 west – Dayton Western terminus; I-70 east exit 96
0.46 0.74 1A US 33 west (Lower Scioto Greenway) Westbound exit and eastbound entrance
0.95 1.53 1B Grandview Avenue (CR 73) Signed as exit 1 eastbound
2.24 3.60 2A US 33 (Dublin Road) / SR 315 south Eastbound exit and westbound entrance; connection to SR 315 ramps via traffic signals and (for NB-WB traffic) a short stretch of US 33
2.42 3.89 SR 315 south Westbound exit and eastbound entrance
2.43 3.91 2B SR 315 north
3.14 5.05 3 CR 578 (Neil Avenue) / Goodale Street Goodale Street not signed eastbound
4 US 23 (Third Street / Fourth Street) / High Street – Convention Center Signed as exits 4A (south) and 4B (north) eastbound, 4A (north) and 4B (south) westbound; High Street not signed eastbound
4.33 6.97 4C SR 3 (Cleveland Avenue) / Leonard Avenue (CR 23) Westbound exit is part of exit 5
5 Spring Street – Downtown Westbound exit and eastbound entrance
I-71 – Cleveland, Cincinnati Signed as exits 5A (south) and 5B (north) eastbound; I-71 south exit 109A, north exits 109A-B
6.44 10.36 6 Leonard Avenue (CR 23)
7.56 12.17 7 US 62 west (5th Avenue) West end of US 62 overlap
9 Stelzer Road (CR 177) / Johnstown Road (CR 377) / Cassady Avenue (CR 96) – Airport Johnstown Road not signed westbound; Cassady Road not signed eastbound
Gahanna 10.43 16.79 I-270 – Cleveland, Wheeling Eastern terminus; east end of US 62 overlap; I-270 north exit 35, south exit 35A
US 62 east – Gahanna Continuation beyond I-270
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


Route map: Google

KML is from Wikidata
  1. ^ a b Ohio Department of Transportation, [1], 2013-06-03
  2. ^ "Spring-Sandusky". Retrieved 2016-06-16. [self-published source]