East Tennessee

===Roads===
[[File:Appalachian Corridor S, Grainger County, TN.jpg|thumb|upright=1.1|[[U.S. Route 25E]] serves as both Corridor S of the [[Appalachian Development Highway System]] and the [[East Tennessee Crossing Byway]].]]
[[Interstate 75 in Tennessee|Interstate 75]] (I-75) enters East Tennessee in Chattanooga, runs northeast to Knoxville, and then turns north, passing through the Cumberland Mountains into Kentucky. [[Interstate 40 in Tennessee|Interstate 40]] (I-40) traverses the region in an east to west alignment, passing through Knoxville. I-40 and I-75 run [[concurrency (road)|concurrent]] for nearly {{convert|20|mi|km}} in Knoxville and carry more than 210,000 [[annual average daily traffic|vehicles per day]] at their busiest point, the highest traffic volume in Tennessee. [[Interstate 81 in Tennessee|Interstate 81]] (I-81) begins about {{convert|35|mi|km}} east of Knoxville, and runs northeast to Bristol. [[U.S. Route 23 in Tennessee|Interstate 26]] (I-26), while technically an east–west route, begins in Kingsport, runs south to Johnson City, and enters North Carolina to the south, crossing the Blue Ridge Mountains. [[Interstate 24 in Tennessee|Interstate 24]] (I-24) terminates in Chattanooga, and connects the region to Nashville. In Knoxville, both I-40 and I-75 each have auxiliary routes: [[Pellissippi Parkway|I-140]], [[Interstate 640|I-640]], and [[Interstate 275 (Tennessee)|I-275]]. Several designated corridors of the [[Appalachian Development Highway System]] are located in the region, including Corridors B, F, J, K, S, and V, which provide [[Limited-access road|expressway]] connection to Interstate Highways.<ref name="ADHS">{{cite web |title=ADHS Approved Corridors and Termini |url=https://www.arc.gov/adhs-approved-corridors-and-termini/ |website=[[Appalachian Regional Commission]] |access-date=October 7, 2021}}</ref> Other major surface routes in East Tennessee which are part of the [[National Highway System (United States)|National Highway System]] (NHS) are [[List of U.S. Highways in Tennessee|U.S. Routes]] [[U.S. Route 11W|11W]], [[U.S. Route 19 in Tennessee|19]], [[U.S. Route 25E|25E]], [[U.S. Route 27 in Tennessee|27]], [[U.S. Route 64 in Tennessee|64]], [[U.S. Route 321|321]], and [[U.S. Route 411|411]].<ref name=tdotmap>{{cite map|title = 2020 Official Transportation Map|year = 2020 |url = https://www.tn.gov/content/dam/tn/tdot/maps/state-maps/2020_Transportation_Map.pdf|publisher = Tennessee Department of Transportation|access-date = June 4, 2020}}</ref><ref>{{cite map|title=National Highway System : Tennessee|url=https://www.fhwa.dot.gov/planning/national_highway_system/nhs_maps/tennessee/tn_tennessee.pdf|date=September 30, 2020|publisher=Federal Highway Administration|location=Washington, D.C.|access-date=June 5, 2021}}</ref>