one-way street, which leads to SR 20. The routes continue north across the Tennessee River again and enter Limestone County. The routes lose US 31 at a Directional-T Interchange (road) and continue east to I-65. I-565 begins at this point. US 72 Alt. continues along I-565 to Huntsville, and this is the end of SR 20. Old SR 20, (also known as old highway 20) starts at the I-65 and I-565 interchange, it follows the same route as I-565 until the exit at Mooresville, and at exit 7 also follows the same route as Madison Boulevard, and is the original road section that once served by SR 20, it ends after 5.8 miles (9.4 kilometers) at exit 13 at the 3 way intersection with Governors west. History SR 20 was started when Alabama renumbered SR 41 with a statewide renumbering in 1929. The original route passed from US 72 at Muscle Shoals to US 31 at Decatur. This portion was named the Joe Wheeler Highway, and markers commemorating this are still located on East (Decatur at Railroad/Church Streets) and West (Tuscumbia-Old Lee Highway) ends. In 1931, SR 20 replaced SR 2 following US 72 west to the Mississippi state line west of Margerum, and in 1936 it was extended east to Huntsville. 1957 saw many changes to SR 20. It was replaced again by SR 2 along US 72 to the Mississippi state line, and, in turn, SR 20 replaced SR 2 traveling north to Florence and northwest of Florence to the Tennessee state line, forming a route popularly known as New Savannah Highway. SR 20 was also realigned to a much more direct route between Decatur and Huntsville, bypassing the town of Madison. Beginning in the early 1980s, the eastern terminus of SR 20 began retreating to the west. The original terminus was at Clinton Avenue and US 231/US 431 in downtown Huntsville. With the construction of I-565 in the early 1990s along the route of SR 20 east of I-65, SR 20 was slowly pulled back to its current terminus at the junction of I-65 and becomes I-565. Major intersections Historic routes Several sections of Old Highway 20 still exist: Lauderdale County Road 200 through Sullivans Crossroads, Central Heights, Lovelace and McGee Town, known as Old Savannah Highway. Lauderdale County Road 14 from McGee Town to Florence Colbert County Road 22 through Leighton. Jefferson Street through Courtland Old