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| Ohio State Route 306 | |
|---|---|
| State | OH |
| Type | SR |
| Route | 306 |
| Length mi | 22.04 |
| Established | 1932 |
| Direction a | South |
| Terminus a | Streetsboro |
| Direction b | North |
| Terminus b | Mentor |
| Counties | Portage County, Lake County |
Ohio State Route 306 is a north–south state highway in northeastern Ohio, connecting suburban and exurban communities between Streetsboro and Mentor. The route serves as a connector among regional corridors such as Interstate 480, U.S. Route 322, and U.S. Route 20, and it traverses parts of Kirtland and Hudson adjacent townships. The highway runs through Portage County and Lake County and functions as part of commuting patterns for the Cleveland metropolitan area and the Akron metropolitan area.
The southern terminus is at an interchange near Streetsboro where it intersects state and federal routes close to Portage County Airport. From there the roadway heads north through suburban neighborhoods and intersects county routes serving Aurora and Solon suburbs near the Cuyahoga River headwaters. The corridor passes near recreational and institutional landmarks including Mosquito Lake State Park service roads, local parks in Kirtland, and cultural sites proximate to James A. Garfield National Historic Site and Western Reserve Academy. Mid-route, the highway crosses former rail corridors associated with the Baltimore and Ohio Railroad and runs parallel to sections of Conneaut Creek tributaries. Approaching Mentor, the route intersects arterials that provide access to Lake Erie shoreline communities, commercial districts around Great Lakes Mall and regional institutions such as Lakeland Community College.
The designation was assigned during early 20th-century state highway numbering reforms that also affected routes like U.S. Route 20 and State Route 14. Initial alignment changes paralleled regional development tied to the Erie Railroad and the expansion of the National Road corridor. Post-World War II suburbanization driven by industries headquartered in Cleveland and Akron led to incremental widening projects similar to improvements on State Route 8 and U.S. Route 422. Federal programs such as the Federal-Aid Highway Act of 1956 influenced interchange construction at nearby interstates like Interstate 480. Local transportation plans coordinated by entities including the Ohio Department of Transportation and regional planning commissions revised the route's intersections to accommodate traffic growth and to interface with county-maintained roads in Lake County and Portage County.
Major junctions along the corridor provide connections with national and state networks. Notable intersections include crossings or interchanges with U.S. Route 322, Interstate 480, U.S. Route 20, and multiple county routes that lead to municipalities such as Hudson, Aurora, and Concord Township. Each intersection links to regional corridors used by freight traffic from terminals historically served by the Pennsylvania Railroad and passenger movements toward hubs such as Cleveland Hopkins International Airport. Local access points tie the highway to municipal streets providing ingress to downtowns like Mentor-on-the-Lake and civic sites including Lake County Courthouse.
Traffic volumes vary from moderate suburban commuter flows near Streetsboro and Mentor to lighter rural counts in sections abutting preserved wetlands and parkland. Peak-hour patterns reflect commuter demand toward employment centers in Cleveland, Akron, and Youngstown with modal interactions involving local bus routes operated by regional transit agencies and paratransit services tied to institutions like Laketran and area human services. Freight movements use the route as a complementary link between state routes and interstate ramps serving distribution centers for companies headquartered in Cleveland Clinic supply chains and manufacturing sites historically associated with Timken Company supply networks. Safety audits have referenced crash clusters similar to those studied on adjacent corridors such as State Route 44.
Planned improvements are driven by regional mobility plans developed by metropolitan planning organizations and the Ohio Department of Transportation to address capacity, safety, and multimodal needs. Proposals include targeted resurfacing projects, intersection realignments inspired by modern roundabout applications seen on State Route 82, and enhanced bicycle and pedestrian facilities consistent with Complete Streets initiatives adopted by nearby municipalities like Hudson and Kirtland. Potential coordination with federal grant programs such as those administered under recent Infrastructure Investment and Jobs Act appropriations could fund upgrades to drainage, signal systems, and interchange ramps connecting to Interstate 480 and U.S. Route 20. Local stakeholders including county commissioners, chambers of commerce for Portage County and Lake County, and preservation groups near historic sites will influence project priorities.