Alabama State Route 20

State Route 20
Route information
Maintained by ALDOT
Length	73.978 mi[1] (119.056 km)
Major junctions
West end	SR 69 northwest of Florence
Major intersections	Natchez Trace Parkway northwest of Florence US 43 / US 72 / SR 13 / SR 17 at Florence US 72 Alt. / SR 157 at Muscle Shoals SR 67 at Decatur US 31 at Decatur
East end	I-65 / I-565 / US 72 Alt. at Mooresville
Location
Country	United States
State	Alabama
Counties	Lauderdale, Colbert, Lawrence, Morgan, Limestone
Highway system
Alabama State Highway System Interstate US State
← I-20 → SR 21

State Route 20 (SR 20) is a 73.978-mile-long (119.056 km) state highway in the northern part of the U.S. state of Alabama. It travels from the Tennessee state line, where it continues as Tennessee State Route 69, northwest of Florence, east to Interstate 65 (I-65), east of Decatur. It crosses the Tennessee River at Florence (with US 43, US 72, SR 17, and SR 157) and also at Decatur (with US 31 and US 72 Alt.)

US 72 Alt. follows SR 20 from the intersection with US 72 at Muscle Shoals to I-65 east of Decatur, the entire stretch being four-laned.