U.S. Route 431 in Alabama

U.S. Route 431
U.S. Route 431
State Route 1
	usda-zoning US 431 highlighted in red
Route information
	Maintained by ALDOT
Length	352.958 mi (568.031 km)
Existed	January 1954–present
Major junctions
South end	; ; US 231 / US 231 Bus. / US 431 Bus. / SR 1 / SR 210 in Dothan
	US 80 in Phenix City; US 82 in Eufaula; I-85 / US 29 in Opelika; I-20 east of Oxford; US 78 in Oxford; US 278 in Gadsden; I-59 in Attalla; I-565 / US 72 / US 231 in Huntsville;
North end	US 231 / US 431 at the Tennessee state line
Location
Country	United States
State	Alabama
Counties	Houston, Henry, Barbour, Russell, Lee, Chambers, Randolph, Cleburne, Calhoun, Etowah, Marshall, Madison
Highway system
	United States Numbered Highway System; List; Special; Divided; Alabama State Highway System; Interstate; US; State;

U.S. Route 431 (US 431), internally designated by the Alabama Department of Transportation (ALDOT) as State Route 1 (SR 1), is a major north–south state highway across the eastern part of the U.S. state of Alabama. Although US 431's south end is in Dothan, SR 1 continues south for about 13 miles (21 km) along US 231 to the Florida state line.