State Route 1 (SR 1): Designated along US 431, running from the Florida state line to the Tennessee state line.
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State Route 2 (SR 2): Follows US 72 across the northern part of the state, from the Mississippi state line to the Georgia state line.
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State Route 3 (SR 3): Coincides with US 31, running from the Gulf Coast to the Tennessee state line.
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State Route 4 (SR 4): Aligns with US 78, from the Mississippi state line through Birmingham, into Georgia.
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State Route 5 (SR 5): Runs from the Gulf Coast northward through Thomasville and Jasper, ending near the Tennessee state line.
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State Route 6 (SR 6): Follows US 82 across the state, from the Mississippi state line to the Georgia state line.
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State Route 7 (SR 7): Coincides with US 11, from the Mississippi state line to the Georgia state line.
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State Route 8 (SR 8): Aligns with US 80, from the Mississippi state line to the Georgia state line.
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State Route 9 (SR 9): Runs from the Florida state line northward through Montgomery and Auburn, into Georgia.
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State Route 10 (SR 10): Traverses the southern part of the state, from the Mississippi state line through Greenville and Troy, into Georgia.
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State Route 13 (SR 13): Extends from Mobile northward through Tuscaloosa and Jasper, ending near the Tennessee state line.
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State Route 14 (SR 14): Runs from the Mississippi state line eastward through Selma and Montgomery, ending near Auburn.
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State Route 15 (SR 15): Coincides with US 29, from the Florida state line through Andalusia and Tuskegee, into Georgia.
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State Route 16 (SR 16): Aligns with US 90, from the Mississippi state line through Mobile, into Florida.
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State Route 17 (SR 17): Runs from the Mississippi state line northward through Vernon and Hamilton, ending near Florence.
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State Route 18 (SR 18): Traverses the western part of the state, from the Mississippi state line through Fayette, ending near Oakman.
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State Route 19 (SR 19): Extends from the Mississippi state line northward through Red Bay, ending near Vina.
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State Route 20 (SR 20): Coincides with US 72 Alternate, from the Mississippi state line through Florence and Decatur, ending near Huntsville.
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State Route 21 (SR 21): Runs from the Florida state line northward through Atmore and Montgomery, ending near Piedmont.
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State Route 22 (SR 22): Traverses the central part of the state, from the Mississippi state line through Selma and Alexander City, ending near Roanoke.
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State Route 23 (SR 23): Extends from the Florida state line northward through Ashford, ending near Dothan.
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State Route 24 (SR 24): Runs from the Mississippi state line eastward through Russellville and Moulton, ending near Decatur.
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State Route 25 (SR 25): Traverses the central part of the state, from the Mississippi state line through Greensboro and Montevallo, ending near Leeds.
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