There are a total of 21 Interstate Highways in Ohio, including both primary and auxiliary routes. With the exception of the

Ohio Turnpike The Ohio Turnpike, officially the James W. Shocknessy Ohio Turnpike, is a limited-access toll highway in the U.S. state of Ohio, serving as a primary corridor between Chicago and Pittsburgh. The road runs east–west in the northern section o ...

(which carries portions of

Interstate 76 Interstate 76 may refer to: Interstate Highways in the United States * Interstate 76 (Colorado–Nebraska) * Interstate 76 (Ohio–New Jersey), running through Pennsylvania Video gaming * ''Interstate '76 ''Interstate '76'' is a vehicular ...

(I-76),

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

, and I-90), all of the Interstate Highways are owned and maintained by the U.S. state of

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

through the

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

(ODOT); however, they were all built with money from the

U.S. federal government The federal government of the United States (U.S. federal government or U.S. government) is the national government of the United States, a federal republic located primarily in North America, composed of 50 states, a city within a fed ...

. 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 Great Lakes region, Great Lakes/Midwestern and Southeastern region of the United States. Its southern terminus is at an interchange with Interstate 64 in Kentucky, I-64 and ...

, 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 an American military officer and statesman who served as the 34th president of the United States from 1953 to 1961. During World War II, ...

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 for ...

, 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 - expre ...

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 state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

. 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 Columbus is a Latinized version of the Italian surname "''Colombo''". It most commonly refers to: * Christopher Columbus (1451-1506), the Italian explorer * Columbus, Ohio, capital of the U.S. state of Ohio Columbus may also refer to: Places ...

File:Overview of West Lancaster.jpg, I-71 near West Lancaster and

Octa The Orange County Transportation Authority (OCTA) is the transportation planning commission for Orange County, California in the Los Angeles metropolitan area. OCTA is responsible for funding and implementing transit and capital projects for ...

File:Lockland Ohio Canal.jpg, I-75 near the Lockland Miami and Erie Canal File:Brimfield Township, Portage County, Ohio.jpg, I-76 in Portage County File:I80Cuyahoga.JPG, I-80 over the Cuyahoga River

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 Cuyahoga River 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 the sixth-largest city in the U.S. state of Ohio and the county seat of Montgomery County. A small part of the city extends into Greene County. The 2020 U.S. census estimate put the city population at 137,644, while Greater Da ...

Business routes

References

External links

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

Ohio Maps