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| State Route 73 (Ohio) | |
|---|---|
| State | OH |
| Route | 73 |
| Type | SR |
| Length mi | 158.3 |
| Established | 1924 |
| Direction a | West |
| Terminus a | Cincinnati |
| Junctions | Hamilton County; Clermont County; Warren County; Clinton County; Fayette County; Madison County; Franklin County; Pickaway County; Fairfield County; Hocking County; Jackson County |
| Direction b | East |
| Terminus b | Jackson |
State Route 73 (Ohio) is an east–west highway traversing southern and central parts of the U.S. state of Ohio. The route connects the metropolitan area of Cincinnati with the Appalachian foothills near Jackson, passing through a mix of suburban, agricultural, and small urban communities. It serves as a regional arterial linking county seats, industrial parks, and state routes across multiple counties.
State Route 73 begins near Cincinnati and proceeds eastward through Hamilton County, intersecting major corridors including I-275 and U.S. Route 27, before entering Clermont County near Bethel. Continuing into Warren County, it passes through Morrow-adjacent areas and crosses Interstate 71 near South Lebanon and Mason, providing access to regional destinations such as Kings Island and Lebanon.
Further east, the route moves into Clinton County and serves Wilmington and nearby industrial areas including facilities associated with Humana, General Electric, and distribution centers tied to Procter & Gamble and Amazon. In Fayette County it approaches Washington Court House, and in Madison County it intersects with U.S. Route 42 and provides local access to London.
Entering Franklin County, the highway skirts southern suburbs of Columbus and crosses routes such as I-270 near communities with ties to The Ohio State University research parks and John Glenn International Airport-related corridors. Moving southeast, SR 73 traverses Pickaway County and Fairfield County near Lancaster and the Ohio University regional outreach centers before entering Hocking County and the more rugged terrain approaching Jackson County.
Throughout its course the highway intersects or parallels numerous state and U.S. routes, including US 22, US 23, SR 104, SR 256 and SR 56, forming part of a network that links to statewide corridors like I-70 and I-71.
The corridor that became SR 73 traces early 20th-century alignments established during the formation of Ohio's numbered highway system in 1924, reflecting transportation priorities during the Automobile Age and the expansion of regional commerce. Over subsequent decades, improvements paralleled developments such as the New Deal infrastructure programs and post-World War II suburbanization linked to Cincinnati and Columbus growth.
Major realignments occurred to bypass downtowns and to connect with new interstates; for example, modifications were made in response to construction of I-71 and I-70; expansions to four lanes in suburban stretches responded to traffic from destinations like Kings Island and distribution activity tied to corporations such as Kroger and Walmart. Bridge replacements and safety upgrades have been funded through state-level initiatives linked to the Ohio Department of Transportation and federal programs like the Federal Highway Administration grants post-dating the MAP-21 era.
Preservation and rerouting efforts have involved local governments including the Clermont County Board of Commissioners, Warren County Commission, and municipal authorities in communities such as Wilmington, Washington Court House, and Jackson. Historic alignments remain visible near former business districts and community landmarks tied to Ohio's canal era, coal mining heritage, and agricultural fairs like the Jackson County Fair.
The route links with numerous major roads and facilities: - Western terminus near Cincinnati: connections to local arterials and I-275. - Intersection with US 27 and access to Clermont County, Warren County. - Crossings at I-71 and US 22 serving Lebanon and Morrow-area. - Junctions with US 35 near Washington Court House. - Interchange at I-270 in the Columbus periphery. - Eastern terminus at Jackson linking to regional state routes and county roads.
Traffic volumes vary from busy commuter and freight corridors near Cincinnati and Columbus suburbs—attracting daily commuters to employment centers like Procter & Gamble, Honda USA, and logistics hubs—to lower-volume rural segments serving agricultural communities and small towns such as Bethel and Lancaster. Seasonal peaks occur around events at venues like Kings Island and county fairs including the Jackson County Fair, while truck traffic is influenced by distribution centers operated by companies such as Amazon and UPS.
Safety data and congestion studies conducted by the Ohio Department of Transportation and regional planning organizations like the Mid-Ohio Regional Planning Commission and Southwest Ohio Regional Transit Authority inform pavement preservation, intersection improvements, and multimodal planning including connections with regional transit and park-and-ride facilities.
Planned projects include intersection upgrades, pavement rehabilitation, and bridge replacements funded through state transportation plans and federal programs influenced by legislation such as Infrastructure Investment and Jobs Act. Local initiatives by county commissions and metropolitan planning organizations aim to improve safety near schools and industrial parks, enhance bicycle and pedestrian accommodations in suburban nodes associated with The Ohio State University outreach sites, and optimize freight movements serving logistics centers related to national firms like Walmart, FedEx, and Kroger.
Proposals under consideration include corridor studies to evaluate capacity increases, roundabout installations at congested junctions modeled after projects in ODOT districts, and access-management measures near growing suburbs of Columbus and Cincinnati. Coordination with economic development agencies such as JobsOhio and local chambers of commerce is intended to align transportation investments with regional growth objectives.
Category:State highways in Ohio Category:Transportation in Hamilton County, Ohio Category:Transportation in Jackson County, Ohio