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| US Highway 23 | |
|---|---|
| Country | USA |
| Type | US |
| Route | 23 |
| Length mi | 1,435 |
| Established | 1926 |
| Direction a | South |
| Terminus a | Florida state line near Jacksonville |
| Direction b | North |
| Terminus b | Mackinac Bridge vicinity, Michigan |
| States | Florida, Georgia, Tennessee, North Carolina, Virginia, Kentucky, Ohio, Michigan |
US Highway 23 is a north–south United States Numbered Highway running from the vicinity of Jacksonville north through the Appalachian region to northern Michigan. The route connects major urban centers, rural communities, and transportation hubs while paralleling or overlapping with Interstate corridors such as Interstate 75, Interstate 26, and Interstate 77. It has played roles in migration, commerce, and cultural routes associated with Appalachian identity, coal transport, and seasonal labor movements.
US Highway 23 traverses diverse landscapes and administrative jurisdictions including the coastal plain near Jacksonville, the Piedmont around Atlanta, the Appalachian foothills near Asheville, the Cumberland Plateau adjacent to Knoxville, and the Great Lakes region approaching Detroit. In Florida, the corridor connects to U.S. Route 1 and state highways around Duval County. In Georgia it intersects with Interstate 75, Interstate 85, and passes near Macon and Augusta. Across Tennessee, the road links to Interstate 40 and Interstate 81 near Knoxville and serves coal-producing counties connected to Appalachian Regional Commission initiatives. In North Carolina, US 23 runs adjacent to Blue Ridge Parkway approaches and joins corridors to Cherokee and Great Smoky Mountains National Park. Through Virginia, it connects to Interstate 81 and town centers such as Abingdon. In Kentucky, the highway parallels freight routes to Louisville and intersects with U.S. Route 60. In Ohio, it serves cities including Cincinnati, Columbus, and Toledo while crossing rail corridors of Norfolk Southern Railway and CSX Transportation. In Michigan, US 23 reaches the Straits of Mackinac approaches and provides access to ferries linking to Mackinac Island and the Upper Peninsula of Michigan.
Designated with the 1926 United States Numbered Highway System, US 23 replaced or incorporated segments of earlier auto trails that linked Jacksonville to northern industrial centers. Early alignments reflected routing priorities influenced by the Federal Aid Road Act of 1916 and later Federal-Aid Highway Act of 1921. During the Great Migration and subsequent labor movements, the corridor served migrant workers traveling between Appalachian Mountains communities and manufacturing hubs such as Detroit, Cleveland, and Pittsburgh. Mid‑20th century realignments paralleled construction of the Interstate Highway System under the Federal-Aid Highway Act of 1956, leading to concurrencies and bypasses near Atlanta, Knoxville, and Cincinnati. The route has intersected historical events including flood responses coordinated with agencies like the Federal Emergency Management Agency and transportation planning forums involving the American Association of State Highway and Transportation Officials.
Major intersections include nodes with national and regional corridors: the junction with U.S. Route 1 near Jacksonville, interchanges with Interstate 75 in Georgia and Ohio, an overlap with U.S. Route 129 near Gainesville, connections to Interstate 26 near Asheville and Johnson City, crossings of Interstate 40 in Tennessee and North Carolina, tie‑ins with Interstate 81 in Virginia, intersections with U.S. Route 60 in Kentucky, and links to Interstate 475 and Interstate 75 approaches to Toledo. In Michigan, principal nodes include access to Interstate 75 near Saginaw and approaches to the Mackinac Bridge, which connects to Interstate 75 on the Upper Peninsula of Michigan side.
The corridor has multiple auxiliary and concurrent designations, including overlaps with United States Routes such as U.S. Route 1, U.S. Route 129, U.S. Route 23 Business designations in urban centers, and temporary routings during construction managed by state departments like the Florida Department of Transportation, Georgia Department of Transportation, Tennessee Department of Transportation, North Carolina Department of Transportation, Virginia Department of Transportation, Kentucky Transportation Cabinet, Ohio Department of Transportation, and the Michigan Department of Transportation. The highway parallels freight lines of Norfolk Southern Railway and CSX Transportation and interfaces with regional transit authorities such as CARTA (Chattanooga Area Regional Transportation Authority) and metropolitan planning organizations like the Metropolitan Planning Organization (MPO) networks in Cincinnati, Columbus, and Detroit.
US 23 has influenced demographic flows, economic activity, and cultural exchange across the eastern United States. The route facilitated seasonal migration tied to industries in Detroit, Cleveland, and Akron and contributed to freight movement for sectors such as coal mined in Appalachia, textiles in North Carolina, and automotive in Michigan. It intersects with tourism assets including the Blue Ridge Parkway, Great Smoky Mountains National Park, and waterfronts in Lake Erie and Lake Huron regions, supporting leisure economies and small businesses. Transportation planning studies by organizations like the American Association of State Highway and Transportation Officials and regional Metropolitan Planning Organization (MPO) consortia have cited US 23 for safety improvements, economic development initiatives, and heritage corridor designations.
Planned projects include capacity upgrades, safety improvements, and interchange modernization coordinated among state agencies and federal programs such as the National Environmental Policy Act review processes and discretionary grant funding. Proposals involve widening segments in growth corridors near Columbus and Cincinnati, improving multimodal connections to ports on Lake Erie and Lake Michigan, and implementing pavement rehabilitation tied to Infrastructure Investment and Jobs Act allocations. Corridor studies by regional bodies and universities—partnering with entities like the Federal Highway Administration and state departments—address freight bottlenecks, bridge replacements, and resiliency measures against extreme weather events similar to responses to past incidents overseen by Federal Emergency Management Agency.
Category:United States Numbered Highways