State Route 18 (SR 18) is a 61.591-mile-long (99.121 km) state highway in northwest Alabama.

Quick Facts State Route 18, Route information ...

State Route 18
Route information
Maintained by ALDOT
Length	61.591 mi[1] (99.121 km)
Major junctions
West end	MS 12 at the Mississippi state line west of Vernon
Major intersections	SR 17 at Vernon US 43 / SR 171 at Fayette SR 107 at Fayette
East end	SR 69 at Oakman
Location
Country	United States
State	Alabama
Counties	Lamar, Fayette, Walker
Highway system
Alabama State Highway System Interstate US State
← SR 17 → SR 19

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SR 18 begins at the Mississippi state line near Vernon. In Vernon, it junctions with SR 17. It continues on its curvy route east, then southeast to the Fayette County line.

It then junctions with SR 107. It turns south and junctions with SR 96 west. It then junctions with US 43 north and SR 171. It continues southeast with US 43 south. It makes an unusual curve south in Stough. It turns east again and junctions with SR 13. SR 13 continues north independently and continues south with US 43 at this junction. It does not maintain a concurrency past this point. The route passes through Berry and maintains a concurrency with CR 63. After this concurrency ends, SR 18 continues east on its own route. It passes through hilly terrain and crosses into Walker County.

After continuing through hilly terrain for multiple more miles, the route ends in Oakman, just south of Jasper, at SR 69. SR 69 continues north on SR 18's right-of-way at this point and continues south at a new right-of-way.

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