U.S. Route 431 in Alabama

U.S. Route 431
State Route 1
US 431 highlighted in red
Route information
Maintained by ALDOT
Length	352.958 mi[1] (568.031 km)
Existed	January 1954[2]–present
Major junctions
South end	US 231 / US 231 Bus. / US 431 Bus. / SR 1 / SR 210 in Dothan
Major intersections	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 US 231 in Huntsville I-565 / US 72 Alt. in Huntsville US 72 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
← I-422 → I-459
← SR 959 SR 1 → SR 2

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.