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The Web Mapping applications and PDF maps below display the National Highway System (NHS) within the State of Ohio. The NHS is a network of strategic highway which include Interstates and other roads important to the nation's economy, defense, and mobility.
Mile Marker Maps. Maps that denote mile markers for state, federal, and interstate highways are available for all 88 counties in Ohio on the Transportation Information Mapping System (TIMS). On TIMS, select "Milepost Map" under "Map Type" and generate downloadable .PDF maps for any county in Ohio.
TIMS is ODOT's GIS mapping portal where you can discover information about Ohio's transportation system, create maps, and share information.
The state has 736 miles of navigable waterways; 265 miles along Lake Erie, 451 miles along the Ohio River, 11 miles along the Maumee River and 9 miles along the Cuyahoga River. Ohio’s Maritime Transportation System (MTS) is a key component of the state’s multimodal freight transportation system.
From new driveways on a highway to oversized loads traveling through Ohio, ODOT manages most permit applications electronically.
Ohio has more route miles than this, most of which comes from I-80 running concurrently with I-90 for 142.80 miles (229.81 km). The Interstate Highways in Ohio range in length from I-71 , at 248.15 miles (399.36 km), all the way down to I-471 , at 0.73 miles (1.17 km).
NATIONAL HIGHWAY SYSTEM National Highway System The National Highway System (NHS) consists of roadways important to the nation’s econ - omy, defense, and mobility. It includes the following subsystems of roadways (note that a specific highway route may be on more than one subsystem): • Interstate • Other Principal Arterials
