Editing Tennessee (section)

===Roads===
{{further|List of Interstate Highways in Tennessee|List of U.S. Highways in Tennessee|List of state highways in Tennessee|Tennessee State Route System}}
[[File:I-40 near Nashville Int'l Airport.jpg|thumb|left|alt=Photograph of Interstate 40 in Nashville. Interstate 40 traverses Tennessee from east to west, and serve's the state's three largest cities.|[[Interstate 40 in Tennessee|Interstate 40]] traverses Tennessee from east to west, and serves the state's three largest cities.]]

Tennessee has {{convert|96,167|mi|km}} of roads, of which {{convert|14,109|mi|km}} are maintained by the state.<ref name=transoverview>{{cite web |url=https://www.tn.gov/tdot/about/transportation-system-overview.html |title=Transportation System Overview |author=<!--Not stated--> |website=tn.gov |publisher=Tennessee Department of Transportation|access-date=May 25, 2021}}</ref> Of the state's highways, {{convert|1,233|mi|km}} are part of the [[Interstate Highway System]]. Tennessee has no [[toll roads in the United States|tolled]] roads or bridges but has the sixth-highest mileage of [[high-occupancy vehicle lane|high-occupancy vehicle (HOV) lanes]], which are utilized on freeways in the congestion-prone Nashville and Memphis metropolitan areas.<ref>{{cite news |last=Hinds |first=Andrea |date=October 16, 2017 |title=3 Reasons HOV Lanes Are Effective in Washington (and Can Work in Tennessee Too) |url=https://rutherfordsource.com/3-reasons-hov-lanes-effective-washington-can-work-tennessee/ |work=Rutherford Source |location=Murfreesboro, Tennessee |access-date=May 25, 2021}}</ref>

[[Interstate 40 in Tennessee|Interstate 40]] (I-40) is the longest Interstate Highway in Tennessee, traversing the state for {{convert|455|mi|km}}.<ref name=fhwa>{{cite web |first = Kevin |last = Adderly |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table02.cfm |work = Route Log and Finder List |title = Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2015 |access-date = February 6, 2016 |date = December 31, 2015 |publisher = Federal Highway Administration |archive-date = July 3, 2017 |archive-url = https://web.archive.org/web/20170703182115/https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table02.cfm |url-status = live}}</ref> Known as "Tennessee's Main Street", I-40 serves the major cities of Memphis, Nashville, and Knoxville, and throughout its entire length in Tennessee, one can observe the diversity of the state's geography and landforms.<ref name=maertens/>{{sfn|Moore|1994|pp=xxiii–xl}} I-40's branch interstates include [[Interstate 240 (Tennessee)|I-240]] in Memphis; [[Interstate 440 (Tennessee)|I-440]] in Nashville; [[Interstate 840 (Tennessee)|I-840]] around Nashville; [[Pellissippi Parkway|I-140]] from Knoxville to [[Maryville, Tennessee|Maryville]]; and [[I-640]] in Knoxville. In a north–south orientation, from west to east, are interstates [[Interstate 55 in Tennessee|55]], which serves Memphis; [[Interstate 65 in Tennessee|65]], which passes through Nashville; [[Interstate 75 in Tennessee|75]], which serves Chattanooga and Knoxville; and [[Interstate 81 in Tennessee|81]], which begins east of Knoxville, and serves Bristol to the northeast. [[Interstate 24 in Tennessee|I-24]] is an east–west interstate that enters the state in Clarksville, passes through Nashville, and terminates in Chattanooga. [[U.S. Route 23 in Tennessee|I-26]], although technically an east–west interstate, begins in Kingsport and runs southwardly through [[Johnson City, Tennessee|Johnson City]] before exiting into North Carolina. [[Interstate 155 (Missouri-Tennessee)|I-155]] is a branch route of I-55 that serves the northwestern part of the state. [[Interstate 275 (Tennessee)|I-275]] is a short spur route in Knoxville. [[Interstate 269|I-269]] runs from [[Millington, Tennessee|Millington]] to [[Collierville, Tennessee|Collierville]], serving as an outer bypass of Memphis.<ref name=fhwa/><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>