There are a total of 21 Interstate Highways in Ohio, including both primary and auxiliary routes. With the exception of the Ohio Turnpike (which carries portions of Interstate 76 (I-76),

I-80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one of the ori ...

, and

I-90 Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at . It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain states, Mountain West, Great Pla ...

), all of the

Interstate Highways The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National H ...

are owned and maintained by the U.S. state of

Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...

through the

Ohio Department of Transportation The Ohio Department of Transportation (ODOT; ) is the administrative department of the government of Ohio, Ohio state government responsible for developing and maintaining all state and U.S. roadways outside of municipalities and all List of In ...

(ODOT); however, they were all built with money from the U.S. federal government. The road miles of these 21 Interstates add up to a total of . Ohio has more route miles than this, most of which comes from I-80 running concurrently with I-90 for . The Interstate Highways in Ohio range in length from

I-71 Interstate 71 (I-71) is a north–south Interstate Highway in the midwestern and Southeastern United States, southeastern regions of the United States. Its southern terminus is at an interchange with Interstate 64, I-64 and Interstate 65, ...

, at , all the way down to I-471, at . As of 2019, out of all the states, Ohio has the fifth-largest Interstate Highway System. Ohio also has the fifth-largest traffic volume and the third-largest quantity of truck traffic. Ohio ranks second in the nation in terms of the number of bridges for its Interstates.

History

On June 29, 1956, President

Dwight D. Eisenhower Dwight David "Ike" Eisenhower (born David Dwight Eisenhower; October 14, 1890 – March 28, 1969) was the 34th president of the United States, serving from 1953 to 1961. During World War II, he was Supreme Commander of the Allied Expeditionar ...

signed the

Federal Aid Highway Act of 1956 The Federal-Aid Highway Act of 1956, also known as the National Interstate and Defense Highways Act, was enacted on June 29, 1956, when President Dwight D. Eisenhower signed the bill into law. With an original authorization of $25 billion (e ...

, which called for the construction of up to of Interstate Highways. Of that, up to were to be built in Ohio. The same year, Ohio passed a law which raised the state's

speed limit Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, express ...

to , and in 1957, Ohio began the construction of its Interstate Highway allotment. By 1958, Ohio had spent more money on its Interstate Highways than either New York or

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. Ohio had completed the construction of of pavement by 1960, by 1962, and by 1970. By the end of 1971, Ohio had only of Interstate still to build. On September 19, 2003, Ohio finally finished the originally planned Interstate Highway System.

Primary Interstates

File:I-71 I-70 Columbus OH (crop).jpg, I-70 at the I-71 interchange near Columbus File:Overview of West Lancaster.jpg, I-71 near West Lancaster and Octa File:Lockland Ohio Canal.jpg, I-75 near the Lockland

Miami and Erie Canal The Miami and Erie Canal was a canal that ran from Cincinnati, Ohio, Cincinnati to Toledo, Ohio, Toledo, Ohio, creating a water route between the Ohio River and Lake Erie. Construction on the canal began in 1825 and was completed in 1845 at a co ...

File:Brimfield Township, Portage County, Ohio.jpg, I-76 in Portage County File:I80Cuyahoga.JPG, I-80 over the

Cuyahoga River The Cuyahoga River (see ) is a river located in Northeast Ohio that bisects the City of Cleveland and feeds into Lake Erie. As Cleveland emerged as a major manufacturing center, the river became heavily affected by industrial pollution, so mu ...

Auxiliary Interstates

File:I-270 at SR-161 cloverleaf 1995.jpg, Cloverleaf interchange between I-270 and SR-161 File:Interstate 80 over the Cuyahoga River.jpg, A picture of the I-271 bridge over the

File:I275 in Sharonville.jpg, I-275 in the Sharonville neighborhood File:Double interchange on I675.jpg, The I-675 double interchange southeast of

Dayton Dayton () is a city in Montgomery County, Ohio, United States, and its county seat. It is the List of cities in Ohio, sixth-most populous city in Ohio, with a population of 137,644 at the 2020 United States census, 2020 census. The Dayton metro ...

Business routes

References

External links

{{Commons category, Interstate Highways in Ohio
Ohio Interstate Exit Guide

Ohio Maps