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| Ohio State Route 310 | |
|---|---|
| State | OH |
| Type | SR |
| Route | 310 |
| Length mi | 11.5 |
| Direction a | South |
| Terminus a | U.S. Route 36 |
| Junction | Interstate 71 |
| Direction b | North |
| Terminus b | State Route 31 |
| Counties | Union County |
Ohio State Route 310 is a north–south state highway located entirely within Union County in the central part of Ohio. The route connects rural areas and small towns, providing links between U.S. Route 36, Interstate 71, and State Route 31 near Marysville and Plain City. It serves agricultural, residential, and commuter traffic between localities such as Magnetic Springs, North Lewisburg, and communities along Ohio State Route 4 and State Route 47.
Starting at its southern terminus near U.S. Route 36, the highway travels north through townships including Bowling Green Township and Jackson Township. The route crosses features such as the Blanchard River watershed and intersects county roads that connect to Ohio Wesleyan University-area corridors and commuter routes toward Columbus. Along its alignment the road passes farmland adjacent to properties associated with Union County Courthouse jurisdiction and provides access to local schools serving students from districts like Marysville Exempted Village Schools and Jonathan Alder Local School District. Northbound, the highway meets an interchange with Interstate 71 providing regional connections to Cincinnati, Cleveland, and Dayton. Approaching its northern terminus, the roadway skirts residential subdivisions tied to Plain City, Ohio commuting patterns before ending at State Route 31 near the Midwest agricultural corridors.
The corridor was originally established as part of early 20th-century county routes used during the expansion of state networks following legislation influenced by the Good Roads Movement and initiatives by the Ohio Department of Highways. Designation changes during the 1930s and 1950s reflected statewide renumbering similar to actions affecting U.S. Route 42 and State Route 4. The route saw improvements contemporaneous with federally funded programs under the Federal Aid Highway Act of 1956 which also shaped nearby interstates like Interstate 71. Local projects in the 1970s and 1990s paralleled developments in Union County, Ohio land use planning and the growth of Marysville, Ohio industrial facilities, including employment expansions linked to companies such as Honda of America Mfg., Inc. that influenced commuter demands. Maintenance history includes mill-and-overlay and bridge replacement projects coordinated with the Ohio Department of Transportation that mirror statewide preservation programs affecting routes like U.S. Route 23 and State Route 736.
The route's principal junctions include its southern terminus at U.S. Route 36, intersections with county arteries feeding into State Route 4 and State Route 47, an interchange with Interstate 71, and its northern terminus at State Route 31. Other important crossroads provide continuity to roads leading toward Marysville, Ohio, Plain City, Ohio, North Lewisburg, Ohio, Magnetic Springs, Ohio, and connections to regional corridors serving Union County Airport-area traffic and farm-to-market routes used for United States Department of Agriculture-classified produce transport.
Traffic volumes vary seasonally and diurnally, with commuter peaks reflecting shifts toward Columbus, Ohio employment centers and industrial employers in Marysville, Ohio such as Honda of America Mfg., Inc. and logistics operations linked to CSX Transportation and Norfolk Southern Railway corridors. Agricultural harvest periods increase heavy-vehicle counts related to operations overseen by United States Department of Agriculture offices and local Union County, Ohio cooperative services. Traffic monitoring and counts are conducted in patterns analogous to those on nearby state routes including SR 4 and U.S. 33, informing pavement management consistent with practices from the Ohio Department of Transportation and federal guidelines under the Federal Highway Administration.
Administrative responsibility lies with the Ohio Department of Transportation in coordination with Union County, Ohio officials for right-of-way issues and local permitting, following policies influenced by statutes such as the Ohio Revised Code. Routine maintenance tasks — snow removal, pavement preservation, signage, and bridge inspections — follow standards adopted from the American Association of State Highway and Transportation Officials and inspection regimes paralleling bridges on routes like U.S. 42. Capital projects have been funded through state transportation budgets and federal aid programs developed in partnership with entities like the Federal Highway Administration.
Proposed improvements have included safety upgrades, shoulder widening, and intersection realignments modeled after projects on nearby corridors such as SR 257 and SR 161. Proposals have been discussed in planning meetings involving Union County, Ohio commissioners, the Marysville-Union County Chamber of Commerce, and regional planning organizations similar to the Mid-Ohio Regional Planning Commission. Potential funding sources cited in planning documents include state capital appropriations, federal grant programs like those from the U.S. Department of Transportation, and local matching funds coordinated with township trustees across jurisdictions intersected by the highway.
Category:State highways in Ohio Category:Transportation in Union County, Ohio