Interstate 675 Ohio

Interstate 675 Ohio
Miamisburg, OH ↔ Spangler Road – Medway, OH•26.97 miles

Overview

Connecting I-75 in Miami Township with I-70 in Mad River Township, Interstate 675 forms an eastern bypass of Dayton to the south and east, providing part of a regional route south to Cincinnati and east to Springfield. The freeway loop also travels through the cities of Centerville, Kettering, Beavercreek and Fairborn and serves Wright-Patterson Air Force Base.

Mileage by State

Ohio26.97 mi

Data Sources

June 18, 2025 Ohio Department of Transportation (ODOT) Straight Line Diagrams. https://www.transportation.ohio.gov/programs/technical-services/tech-services-card-catalog/sld

History

The original proposed alignment for Interstate 675 called for it to loop back to I-75 in the vicinity of Northridge. It was later realigned to link with I-70 west of Springfield. Interstate 675 was approved by the American Association of State Highway and Transportation Officials (AASHTO) on June 23, 1969. The freeway was completed by 1989.

North End Interstate 70 Ohio State Route 4 ‐ Spangler Road – Medway, OH

Interstate 675 North at Interstate 70 Ohio State Route 4

I-675 north at I-70/SR 4 - Medway, OH

Exit 24 leaves Interstate 675 north for SR 444 to Holiday Valley and the village of Enon 1.25 miles south of I-70/SR 4. SR 4 overlaps with I-70 for six miles between freeway spurs to Wright-Patterson AFB and Springfield. Photo by Chris and Amber Lokken (05/10/08).

I-675 north at I-70/SR 4 - Medway, OH I-675 north at I-70/SR 4 - Medway, OH I-675 north at I-70/SR 4 - Medway, OH I-675 north at I-70/SR 4 - Medway, OH

Interstate 70 Ohio State Route 4 East at Interstate 675

I-70/SR 4 east at I-675 - Medway, OH

SR 4 combines with Interstate 70 east ahead of the cloverleaf interchange (Exit 44) with I-675 south and Spangler Road north. Photo by Steve Hanudel (08/20/05).

I-70/SR 4 east at I-675 - Medway, OH I-70/SR 4 east at I-675 - Medway, OH I-70/SR 4 east at I-675 - Medway, OH I-70/SR 4 east at I-675 - Medway, OH

Interstate 675 South at Interstate 70 Ohio State Route 4

I-675 south at I-70/SR 4 - Medway, OH

Spangler Road crosses the Mad River and transitions into Interstate 675 south at the cloverleaf interchange (Exit 26) with I-70/SR 4. Photo by Chris and Amber Lokken (05/10/08).

I-675 south at I-70/SR 4 - Medway, OH I-675 south at I-70/SR 4 - Medway, OH

South End Interstate 75 ‐ Miamisburg, OH

Interstate 675 South at Interstate 75

I-675 south at I-75 - Miamisburg, OH

I-675 narrows from six to four lanes at the parclo interchange (Exit 2) with SR 725. The freeway converges with I-75 south of Dayton Mall in 1.5 miles. Photo by Steve Hanudel (08/20/05).

I-675 south at I-75 - Miamisburg, OH I-675 south at I-75 - Miamisburg, OH I-675 south at I-75 - Miamisburg, OH I-675 south at I-75 - Miamisburg, OH

Interstate 75 North at Interstate 675

I-75 north at I-675 - Miamisburg, OH

Interstate 675 travels 17.2 miles north from I-75 to SR 844 (McClerron Memorial Skyway), a freeway spur north to Wright State University and Wright-Patterson Air Force Base. Photo by Eric Stuve (07/29/17).

I-75 north at I-675 - Miamisburg, OH I-75 north at I-675 - Miamisburg, OH I-75 north at I-675 - Miamisburg, OH I-75 north at I-675 - Miamisburg, OH I-75 north at I-675 - Miamisburg, OH

Interstate 75 South at Interstate 675

I-75 south at I-675 - Miamisburg, OH

Heading south through Miami Township, Interstate 75 meets SR 725 along a commercialized stretch west of Dayton Mall and north of I-675. Photo by Eric Stuve (05/14/17).

I-75 south at I-675 - Miamisburg, OH I-75 south at I-675 - Miamisburg, OH I-75 south at I-675 - Miamisburg, OH I-75 south at I-675 - Miamisburg, OH
Updated July 1, 2022