Interstate 140 (Tennessee)

Interstate 140 (Tennessee)
Public domain · source
Name	Interstate 140 (Tennessee)
Route type	Auxiliary Interstate
Route number	140
Length mi	11.22
Established	1998
Terminus a	near Oak Ridge, Tennessee
Terminus b	near Alcoa, Tennessee
Counties	Anderson County, Tennessee; Blount County, Tennessee
Previous route	140
Next route	240

Interstate 140 (Tennessee) is an auxiliary Interstate Highway in eastern Tennessee serving as a connector between I‑40 near Oak Ridge, Tennessee and US 129 near Alcoa, Tennessee. The route provides access for commuters, freight, and traffic to McGhee Tyson Airport, Oak Ridge National Laboratory, and regional industrial parks, linking to corridors toward Knoxville, Tennessee and Maryville, Tennessee. It forms part of the broader Interstate Highway System network that integrates with regional routes such as Interstate 75 and long-distance arteries like Interstate 81.

Route description

Interstate 140 begins at an interchange with I‑40 near the western edge of Oak Ridge, Tennessee, providing downstream connections to nodes including Knoxville, Tennessee, Norris, Tennessee, Clinton, Tennessee, and Anderson County, Tennessee. The freeway advances southeast, crossing rural and suburban tracts adjacent to Radiation Laboratory (Oak Ridge), passing commercial zones and intersecting state routes that serve Roane County, Tennessee and nearby Morgan County, Tennessee. Major interchanges connect to arterial roads leading toward Oak Ridge National Laboratory, Y-12 National Security Complex, and research campuses associated with University of Tennessee, Knoxville. Continuing, I‑140 traverses a corridor bordering protected greenways and creek valleys that drain into the Tennessee River, then descends toward the McGhee Tyson Airport area where ramps allow movements for freight and passenger access to Alcoa, Tennessee and Blount County, Tennessee. The eastern terminus near US 129 provides onward travel to Gatlinburg, Tennessee, Pigeon Forge, Tennessee, and tourist corridors into the Great Smoky Mountains National Park via US 441. The alignment includes typical Interstate features: controlled access, grade separations, shoulders, and safety features consistent with standards set by the Federal Highway Administration.

History

Planning for the corridor that became I‑140 evolved from postwar transportation initiatives tied to industrial expansion in Oak Ridge, Tennessee and the rise of McGhee Tyson Airport as a regional hub. Studies involved regional planning bodies including the Tennessee Department of Transportation and federal partners such as the Federal Highway Administration and National Environmental Policy Act reviews. Initial construction phases were completed in the late 1990s, with earlier segments opening to traffic amid concurrent improvements to US Route 411 in Tennessee and SR 33. Extensions were timed to support access to Oak Ridge National Laboratory, Y-12 National Security Complex, and economic development projects championed by local authorities and chambers of commerce including the Knoxville Chamber of Commerce. Subsequent upgrades addressed interchange capacity near Alcoa, Tennessee and safety improvements influenced by design standards from the American Association of State Highway and Transportation Officials.

Exit list

The I‑140 exit list includes numbered interchanges providing access to regional routes and facilities: - Exit 1: Connection with I‑40 toward Nashville, Tennessee and Knoxville, Tennessee. - Exit 3: Local access to Oak Ridge, Tennessee municipal roads and industrial access roads serving Oak Ridge National Laboratory. - Exit 5: Interchange with state routes serving Clinton, Tennessee and Anderson County, Tennessee communities. - Exit 7: Ramps toward McGhee Tyson Airport and industrial parks near Alcoa, Tennessee. - Exit 11: Eastern terminus at US 129 with movements toward Maryville, Tennessee, Gatlinburg, Tennessee, and Great Smoky Mountains National Park.

Future plans and improvements

Planners at the Tennessee Department of Transportation and metropolitan planning organizations such as the Knoxville Regional Transportation Planning Organization have identified corridor improvements including interchange refinements, capacity widening, intelligent transportation system deployments, and truck-climbing lanes to support freight that serves logistics centers like regional distribution facilities associated with national carriers. Proposed projects are subject to environmental review under the National Environmental Policy Act and coordination with agencies including the Federal Aviation Administration for segments near McGhee Tyson Airport. Funding mechanisms may include federal aid authorized by legislation such as the Infrastructure Investment and Jobs Act and state transportation bonds administered through the Tennessee State Funding Board and county commissions in Anderson County, Tennessee and Blount County, Tennessee.

Traffic and usage

Traffic volumes on I‑140 reflect a mix of commuter flows to Knoxville, Tennessee, employee access to Oak Ridge National Laboratory, and freight movements connecting to I‑40 and US 129. Peak period congestion aligns with shifts at major employers like Oak Ridge Associated Universities and logistics centers serving manufacturers with ties to Alcoa USA. Traffic monitoring and planning use data sources from the Federal Highway Administration and state sensor networks; operational strategies draw on guidelines from the American Association of State Highway and Transportation Officials and traffic engineering research from institutions such as the University of Tennessee, Knoxville.

Environmental and community impact

Construction and subsequent operations of I‑140 prompted environmental assessments addressing wetlands, stream crossings, and wildlife habitat near the Tennessee River watershed and riparian corridors feeding the Great Smoky Mountains National Park region. Mitigation efforts involved reforestation, stormwater management following standards set by the Environmental Protection Agency, and noise abatement measures coordinated with local governments including the City of Oak Ridge, Tennessee and the City of Alcoa, Tennessee. Community engagement processes involved stakeholders such as neighborhood associations, economic development agencies, and conservation groups including regional chapters of the Sierra Club and local land trusts, balancing mobility needs with protections for cultural sites tied to the history of Oak Ridge and surrounding communities.

Category:Interstate Highways in Tennessee Category:Transportation in Anderson County, Tennessee Category:Transportation in Blount County, Tennessee