U.S. Route 231 in Alabama

U.S. Route 231
U.S. Route 231
	US 231 highlighted in red
Route information
	Maintained by ALDOT
Length	306.273 mi (492.899 km)
Existed	1926–present
Major junctions
South end	US 231 / SR 75 at Florida state line near Madrid
	; US 84 / US 84 Bus. in Dothan; US 29 in Troy; US 82 near Pike Road; I-85 in Montgomery; I-20 in Pell City; I-59 in Ashville; US 11 in Ashville; US 278 near Brooksville; ; I-565 / US 72 Alt. in Huntsville; US 72 in Huntsville;
North end	US 231 / US 431 at Tennessee state line near Hazel Green
Location
Country	United States
State	Alabama
Counties	Houston, Dale, Coffee, Pike, Montgomery, Elmore, Coosa, Talladega, Shelby, St. Clair, Blount, Cullman, Marshall, Morgan, Madison
Highway system
	United States Numbered Highway System; List; Special; Divided; Alabama State Highway System; Interstate; US; State;

U.S. Route 231 (US 231) in Alabama runs north–south up through the eastern half of Alabama for 306.273 miles (492.899 km). US 231 enters the state from Florida south of Madrid and exits into Tennessee, running councurrently with US 431 north of Hazel Green. US 231 passes through the major cities of Dothan, Troy, Montgomery, and Huntsville.

From the Florida state line to Wetumpka, US 231 is a major four-lane divided thoroughfare that connects Central Alabama to the Florida Gulf Coast and Panama City. Between Wetumpka and Arab, excluding its overlap with US 280 between Sylacauga and Harpersville as well as portions through major towns, the road is largely rural and two lanes. Between Arab and the Tennessee state line, the route returns to a four-lane divided highway; the route is upgraded to a limited-access freeway and adjoining frontage roads named Memorial Parkway within the city of Huntsville.

During its route through the state, US 231 runs concurrently with three state highways. Between the Florida state line and southern Dothan as well as between Huntsville and the Alabama state line, US 231 runs concurrent with unsigned State Route 1 (SR 1). Between northern Dothan and Huntsville, the route is overlaid with SR 53, which is unsigned along its portion with US 231 but does have a signed segment north of Huntsville. Finally, while bypassing Dothan, US 231 is overlaid with the signed SR 210).

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