List of Interstate Highways in Ohio - Auxiliary Highway List

Auxiliary Highway List

A list of the auxiliary interstate routes in Ohio.

Highway Location Major cities served Length (mi) Length (km) Description References
I-270 Franklin County Columbus 54.97 88.47 I-270 is a large loop around Columbus, Ohio. On its east side and again on its west side, I-270 intersects with I-70. On both its northern and its southern sides, I-270 intersects I-71. I-670 intersects I-270 on its northeastern side.
I-271 Medina, Summit, and Cuyahoga counties Cleveland 46.06 74.13 I-271 begins south of Cleveland and curves counterclockwise around Cleveland. It starts at an intersection with I-71 and travels east until it reaches I-77. It then begins curving north to become concurrent with I-480 for 3.1 miles (5.0 km), which comes in from the southeast. I-271 and I-480 continue almost due north until I-480 splits off again to the west. I-271 then continues north until it terminates at I-90
I-275 Hamilton and Clermont counties Cincinnati 55.97 90.07 I-275 enters Ohio from the south in the Cincinnati area, and it travels counterclockwise around Cincinnati. Northeast of Cincinnati, it intersects I-71, which crosses it from the northeast. North of Cincinnati, it intersects I-75. It then becomes concurrent with I-74, which joins it from the south, for around 2.7 miles (4.3 km). I-74 then leaves to the northeast, and I-275 continues southwest until it passes out of Cincinnati on Ohio's western border.
I-277 Summit County Akron 4.14 6.66 I-277 starts at the SR-224 and I-77 intersection south of Akron and heads west. It then interstects I-76 which comes from the north, and the road continues as I-76.
I-280 Lucas and Wood counties Toledo 12.41 19.97 I-280 starts south of Toledo at its southern terminus, an intersection with the I-80 and I-90 combined highway. It heads north, curving slightly to the west, and ends by merging with I-75.
I-470 Belmont County Wheeling 6.69 10.77 I-470 enters Ohio at its eastern border with West Virginia near Wheeling and heads west. It then merges with I-70.
I-471 Hamilton County Cincinnati .73 1.17 I-471 enters Ohio south of Cincinnati, and travels northwest until it reaches its terminus at I-71.
I-475 Lucas County Toledo 20.37 32.78 I-475 is a semicircle around the western half of Toledo. It branches off of I-75 north of Toledo and heads west. It becomes concurrent with SR-23, which comes in from the north, and the two head south together. They cross the I-80 and I-90 combined highway, but they do not have an intersection. I-475 then curves back to the east, and terminates at a merge with I-75 south of Toledo.
I-480 Portage, Summit, Cuyahoga, and Lorain counties Cleveland, Elyria, and Lorain 41.77 67.22 I-480 branches off of I-80 and heads northwest. It then becomes concurrent with I-271 for 3.1 miles (5.0 km) and heads north. I-480 then branches off to the west again, where it intersects I-77. After I-77, I-480 intersects I-71 before finally terminating at another intersection with I-80.
I-490 Cuyahoga County Cleveland 2.43 3.91 I-490 starts at an intersection with East 55th Street and heads west to intersect I-77. It then continues until it reaches an intersection with I-90 and I-71. I-71 comes in from the south and changes designation to I-90 when it leaves the interchange. I-490 comes in from the east, and the road leaves the interchange designated as I-90.
I-670 Franklin County Columbus 9.37 15.08 I-670 branches off of I-270 west of Columbus and heads west into Columbus. It intersects I-71 before terminating at I-70.
I-675 Montogmery, Greene, and Clark counties Dayton 26.53 42.70 I-675 forms a quarter-circle around the southeastern quadrant of Dayton. I-675 branches off of I-75 and heads east. It then curves north, then back to the east, and finally back to the north again. It terminates at its interchange with I-70.
I-680 Mahoning County Warren and Youngstown 16.43 26.44 I-680 branches off of I-76 and heads north into Youngstown. It then curves to the northwest, and terminates at an interchange with I-80.

  • Cloverleaf interchange between I-270 and SR-161

  • A picture of the I-271 bridge over the Cuyahoga River

  • I-275 in the Sharonville neighborhood

  • The I-675 double interchange southeast of Dayton

Read more about this topic:  List Of Interstate Highways In Ohio

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