Editing Interstate 22 (section)

==Route description==
{{lengths table|length_ref=<ref name="fhwa" />}}
|-
|{{abbr|MS|Mississippi}}
|{{convert|106.00|mi|km|disp=table}}
|-
|{{abbr|AL|Alabama}}
|{{convert|96.22|mi|km|disp=table}}
|-
|Total
|{{convert|202.22|mi|km|disp=table}}
|}
[[File:I-22 End Sign at I-269 (25877100407).jpg|thumb|left|Western terminus of I-22 at I-269 in [[Byhalia, Mississippi]]]]
[[File:Int22eRoad-Int65ns-PossibleUnfinishedEnd (33269752022).jpg|thumb|left|Eastern terminus at I-65 in Birmingham, Alabama, {{As of|2016|lc=y}}. The freeway is planned to be extended east toward US&nbsp;31.]]
I-22 serves as a connection between Birmingham and suburban Memphis, filling in a gap in the [[Interstate Highway System]]. It also fills a gap that provides freeway passage between [[Atlanta]] and [[Oklahoma City]].<ref>{{cite web |title = Alabama Engineering Hall of Fame |url = https://engrhof.org/members/interstate-22-corridor-x/ |website = engrhof.org |access-date = March 18, 2023 }}</ref> It begins at an interchange with [[Interstate 269|I-269]] at [[Byhalia, Mississippi]], approximately {{convert|25|mi|km}} from downtown [[Memphis, Tennessee|Memphis]] and travels southeast across northern [[Mississippi]] and [[Alabama]], before ending at an interchange with [[Interstate 65 in Alabama|I-65]] approximately {{convert|5|mi|km|spell=in}} north of downtown [[Birmingham, Alabama]].{{cn|date=November 2024}}

===Mississippi===
[[File:Interstate 22 eastbound at Potts Camp, Mississippi.jpg|thumb|Eastbound I-22/US&nbsp;78 in [[Potts Camp, Mississippi]]]]
I-22 begins at a [[cloverleaf interchange]] with [[Interstate 269|I-269]] just west of [[Byhalia, Mississippi|Byhalia]] in [[DeSoto County, Mississippi|DeSoto County]] in northwestern [[Mississippi]] in the [[Memphis metropolitan area|far southeastern suburbs of Memphis]]. It is concurrent with [[U.S. Route 78 in Mississippi|US&nbsp;78]], which is a four-lane freeway through its entire length in Mississippi and the exit numbers for its overlap with I-22 remain based on its mileage. I-22/US&nbsp;78 then continues southeastward into [[Marshall County, Mississippi|Marshall County]] parallel to [[Mississippi Highway 178]] (MS&nbsp;178; the former alignment of US&nbsp;78) with latter route providing local access to small towns along the route. The first major community the freeway passes is [[Holly Springs, Mississippi|Holly Springs]], the county seat of Marshall County. I-22/US&nbsp;78 bypasses the city to the southwest; exits&nbsp;26 (Landfill Road) and 30 ([[Mississippi Highway 4|MS&nbsp;4]]/[[Mississippi Highway 7|MS&nbsp;7]]) provide access to the city. Continuing southeastward, the freeway than passes through the [[Holly Springs National Forest]] and into [[Benton County, Mississippi|Benton County]] passing near several small towns that are accessible through interchanges with or connecting to MS&nbsp;178. Upon exiting the forest into [[Union County, Mississippi|Union County]], I-22/US&nbsp;78 approaches the county seat of [[New Albany, Mississippi|New Albany]] before passing just southwest of it with four exits (60, 61, 63, and 64) providing direct access to the city. [[Mississippi Highway 30|MS&nbsp;30]] shares a brief concurrency with I-22/US&nbsp;78 between exits&nbsp;61 and 64 with the latter exit being at [[Mississippi Highway 15|MS&nbsp;15]]. To the southeast of the city near the town of [[Sherman, Mississippi|Sherman]] in [[Pontotoc County, Mississippi|Pontotoc County]], I-22/US&nbsp;78 has a second brief concurrency with [[Mississippi Highway 9|MS&nbsp;9]] starting between the exits&nbsp;73 and 76. Exit&nbsp;73 is a six-ramp [[partial cloverleaf interchange]], the first non-diamond interchange on the freeway since its starting point at I-269, a distance of about {{convert|61.2|mi|km}}. I-22/US&nbsp;78 then enters [[Lee County, Mississippi|Lee County]] and passes north of [[Tupelo, Mississippi|Tupelo]], its county seat, with five exits (81, 82, 85, 86, and 87) connecting to the city, including an interchange with MS&nbsp;178 (exit&nbsp;81) northwest of Tupelo along with interchanges with the [[Natchez Trace Parkway]] (exit&nbsp;85) and [[U.S. Route 45|US&nbsp;45]]/[[Appalachian Development Highway System#Corridor V|Corridor&nbsp;V]] (exit&nbsp;86) north of the city with Corridor&nbsp;V becoming concurrent with I-22/US&nbsp;78. The freeway then turns eastward and has an interchange with [[Mississippi Highway 371|MS&nbsp;371]] north of [[Mooreville, Mississippi|Mooreville]] before crossing into [[Itawamba County, Mississippi|Itawamba County]]. I-22/US&nbsp;78/Corridor&nbsp;V then has an interchange with MS 178 (to [[Mississippi Highway 363|MS 363]]) in [[Peppertown, Mississippi|Peppertown]] before crossing the [[Tennessee–Tombigbee Waterway]] to its next interchange with South Adams Street (exit 104), which provides access to the community of [[Fulton, Mississippi|Fulton]], the county seat. [[Mississippi Highway 25|MS&nbsp;25]] becomes concurrent with I-22/US&nbsp;78/Corridor&nbsp;V and heads eastward along the route at the exit as well. A weigh station is also just beyond the exit. One exit later (108), MS&nbsp;25 and Corridor&nbsp;V branch off and head northward. I-22/US&nbsp;78 then turns east-southeastward with one final interchange (exit&nbsp;113) with [[Mississippi Highway 23|MS&nbsp;23]] south of [[Tremont, Mississippi|Tremont]] before crossing into [[Alabama]].{{cn|date=November 2024}}

===Alabama===
[[File:Corridor X shields along future Interstate 22 in Alabama.jpg|thumb|upright|Corridor&nbsp;X [[Appalachian Development Highway System|ADHS]] shields in [[Marion County, Alabama]], prior to its redesignation as I-22]]
Still a four-lane freeway, I-22/[[U.S. Route 78 in Alabama|US&nbsp;78]] (internally designated as [[Alabama State Route 4|State Route&nbsp;4]], or SR&nbsp;4) enters into northwestern [[Alabama]] northwest of [[Bexar, Alabama|Bexar]] in [[Marion County, Alabama|Marion County]] and heads east-southeastward. Its first interchange (exit&nbsp;3) is located just east of town at County Route&nbsp;33 (CR&nbsp;33). I-22/US&nbsp;78/SR&nbsp;4's next four exits (7, 11, 14, and 16) serve the city of [[Hamilton, Alabama|Hamilton]], the county seat. The freeway curls around the southwest side of the city. Exit&nbsp;7 gives I-22/US&nbsp;78/SR&nbsp;4 access to [[Alabama State Route 19|SR&nbsp;19]] and [[Alabama State Route 74|SR&nbsp;74]], exit&nbsp;11 is an interchange with [[Alabama State Route 17|SR&nbsp;17]] and exit&nbsp;16 is an interchange with [[U.S. Route 43|US&nbsp;43]]/[[U.S. Route 278|US&nbsp;278]]/[[Alabama State Route 171|SR&nbsp;171]]. The final exit also provides access to the community of [[Guin, Alabama|Guin]]. I-22/US&nbsp;78 then passes south of [[Brilliant, Alabama|Brilliant]] which is accessible by interchanges with [[Alabama State Route 44|SR&nbsp;44]] (exit&nbsp;26, which also serves the town of [[Twin, Alabama|Twin]] and the city of Guin) and [[Alabama State Route 129|SR&nbsp;129]] (exit&nbsp;30, which also serves the community of [[Winfield, Alabama|Winfield]]). An interchange with [[Alabama State Route 233|SR&nbsp;233]] (exit&nbsp;34) serves the community of [[Glen Allen, Alabama|Glen Allen]] before I-22/US&nbsp;78/SR&nbsp;4 crosses into [[Walker County, Alabama|Walker County]]. Its next interchange, [[Alabama State Route 13|SR&nbsp;13]] (exit&nbsp;39), serves the communities of [[Eldridge, Alabama|Eldridge]] and [[Natural Bridge, Alabama|Natural Bridge]]. [[Carbon Hill, Alabama|Carbon Hill]] is served by CR&nbsp;11 (exit&nbsp;46, which also serves [[Nauvoo, Alabama|Nauvoo]]) and [[Alabama State Route 118|SR&nbsp;118]] (exit&nbsp;52; former [[U.S. Route 78 Alternate (Carbon Hill–Jasper, Alabama)|US&nbsp;78 Alternate]]). I-22/US&nbsp;78/SR&nbsp;4 then widens to six lanes and has an unsigned interchange (exit&nbsp;53) with future [[Alabama State Route 102|SR&nbsp;102]]. I-22/US&nbsp;78/SR&nbsp;4 then passes just south of [[Jasper, Alabama|Jasper]], the county seat, which is served by four exits (57, 61, 63, and 65) with SR&nbsp;118, [[Alabama State Route 69|SR&nbsp;69]], [[Alabama State Route 269|SR&nbsp;269]], and Industrial Parkway. The freeway narrows to four lanes at exit&nbsp;57 but expands back to six lanes at exit&nbsp;63. The next three exits (70, 72, and 78) serve [[Cordova, Alabama|Cordova]], [[Parrish, Alabama|Parrish]], [[Dora, Alabama|Dora]], [[Sumiton, Alabama|Sumiton]], [[Wyatt, Alabama|Wyatt]], and [[Quinton, Alabama|Quinton]]. I-22/US&nbsp;78/SR&nbsp;4 then enters [[Jefferson County, Alabama|Jefferson County]] and has an interchange with CR&nbsp;45 (exit&nbsp;81), which serves [[West Jefferson, Alabama|West Jefferson]]. Its next interchange is with [[Alabama State Route 5|SR&nbsp;5]] (exit&nbsp;85); the exit marks the end of the concurrency with US&nbsp;78/SR&nbsp;4 which branches off and becomes concurrent with SR&nbsp;5 south, which serves as a local road for [[Graysville, Alabama|Graysville]] and the [[Birmingham metropolitan area, Alabama|northwestern suburbs of Birmingham]]. Between exits&nbsp;85 and 87 (CR&nbsp;112) is the future site of the interchange with [[Interstate 222|I-222]] (exit&nbsp;86), which would connect I-22 to the proposed [[Interstate 422|I-422]] (Corridor&nbsp;X-1/Birmingham Northern Beltline). I-22 than passes through [[Coalburg, Alabama|Coalburg]] before ending at an interchange with [[Interstate 65 in Alabama|I-65]] (unsigned exits&nbsp;95A and 95B) approximately {{convert|5|mi|km|spell=in}} north of downtown Birmingham. Ramp stubs for an additional interchange (future exit&nbsp;95C) just beyond I-65 to [[U.S. Route 31 in Alabama|US&nbsp;31]] have been made, but construction on this won't begin until at least 2030.<ref name="Projects">[https://cpmsapps.dot.state.al.us/OfficeEngineer/ProjectReports/RuralRpts/Rural37.pdf Project reports] state.al.us</ref>