State Route 115 (US 129) Alcoa Highway Improvements

Blount and Knox Counties


The proposed improvements for State Route 115 (US 129/Alcoa Highway) in Blount and Knox Counties follow the existing alignment and consist of widening the existing roadway to six lanes (three lanes in each direction), except for the section between Singleton Station Road and SR 333 (Topside Road) in Blount County, which will be widened to accommodate three travel lanes in each direction and two auxiliary lanes.  Seven interchanges and a center median barrier will be constructed or reconstructed along the route. In Knox County, two new interchanges will be constructed at Topside Road and Maloney Road and two interchanges will be reconstructed at SR 168 (John Sevier Highway) and Cherokee Trail. In Blount County, three new interchanges will be constructed at SR 333 (Topside Road), Hillside Drive and Singleton Station Road. Frontage/collector roads are also proposed at select locations along the route to provide access to properties and local roadways.

Purpose and Need

State Route 115 (US 129/Alcoa Highway) is an urban principal arterial roadway, which is on the National Highway System. It is responsible for moving traffic efficiently throughout the region, particularly between the City of Alcoa and the City of Knoxville.

The proposed projects are intended to address transportation needs, which have been identified through coordination with local officials, agencies and the public. Those transportation needs are as follows:

  • Increase the capacity of Alcoa Highway and the level of service
  • Correct roadway deficiencies
  • Reduce crashes/improve safety

Proposed Design

Due to the significant size of the project, the proposed improvements will be separated into four smaller sections or phases.

Blount County:

  • from SR 162 (Pellissippi Parkway) to north of Little River

Knox County: