U.S. Department of Transportation, Federal Highway Administration, and Tennessee Department of Transportation, Draft Environmental Impact Statement, Pellissippi Parkway Extension (SR 162), From SR 33 (Old Knoxville Highway) to US 321/SR 73/Lamar Alexander Parkway, Blount County, Tennessee, April 2010 Plans call for extending the highway eastward about 4 miles to U.S. Route 321 (Tennessee State Route 73) in Blount County.