| Ohio Department of Transportation: Official website. |
| The Unofficial Ohio State Highways Web Site: Route log including former routings. |
| Cincinnati Roads: Contains video clips of various examples. |
| Cincinnati-Transit.net: Contains details on transit, including bridges and major highways. |
| David Smith's Columbus Roads: Includes photographs, lane diagrams, and an opinion page. |
| Duck Creek Road: Overview of this and other area streets in Cincinnati which were altered to accommodate the construction of Interstate 71. |
| Innerbelt Integration Initiative: A group advocating the completion of Akron's Innerbelt freeway (State Route 59). Site includes background and video clips of the facility. |
| Lake Erie Circle Tour Online: Part of the Great Lakes Circle Tours. |
| North South Transportation Initiative: Plan involving I-75 and other modes of transportation between the area north of Dayton and Northern Kentucky. Includes maps, FAQ, and feedback option. |
| Ohio Route One: Discusses the 1960s routing of this route. |
| Ohio State Route 66 Internet Tour: A guide to this road following the western boundary. |
| Ohio Turnpike Commission: Official page. Includes Turnpike toll rates and construction information. |
| The Ohio Construction Information Association: OCIA services include research for anyone seeking data on the infrastructure, construction issues, multimodal transportation planning, and water and sewer issues. |
| The Ohio Regional Road Pages: Coverage of each region of the state including photographs, history, and links. |
| The Road Home: Covers topics from the southwest part of the state, primarily around Dayton. |
| Toledo's Highways and Byways: Articles and photographs from the two-state region. |
Classical
