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State highway in Alabama, United States From Wikipedia, the free encyclopedia
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.)
State Route 20 | ||||
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| Route information | ||||
| Maintained by ALDOT | ||||
| Length | 73.978 mi[1] (119.056 km) | |||
| Major junctions | ||||
| West end |  SR 69 northwest of Florence | |||
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| 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 | ||||
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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.
SR 20 begins in Waterloo at the Tennessee state line. It junctions with the Natchez Trace Parkway and enters Florence. In Florence, the route junctions with SR 133. It continues south to parallel the Tennessee River, heading east for just a mile as Coffee Road before junctioning with US 72 and US 43 at a Parclo. It crosses the Tennessee River with the two routes, SR 17, and SR 13. This is a quintuple concurrency.
The routes enter Colbert County and Tuscumbia. The routes junction with SR 184. They pass by a few restaurants and a Planet Pepsi building near this junction. The routes reach Muscle Shoals. Here, US 43/SR 17/SR 13 and US 72 turn to the south and west respectively, while SR 20 turns east with U.S. 72 Alt. The two routes junction with SR 133 again and SR 157. This is the southern terminus of SR 133 and the continuation of SR 157. The two routes split off at Leighton. SR 157 continues south to Moulton and Cullman along the right-of-way. US 72 Alt. and SR 20 turn to the direct east/west and eventually enter Lawrence County.
The routes enter Town Creek and junction with AL-101. The routes continue to Courtland and then junction with SR 33. This stretch of road is mostly flat. The routes continue east to the Morgan County line and enter Trinity.
The stretch between here and SR 67 is well known for containing multiple industrial plants, such as 3M and Nucor. The routes junction with SR 67 and gain the Corridor V name. The routes pass through Decatur, junctioning with US 31. This junction is limited because there is no direct connection between US 31 north and SR 20 west. Traffic making that connection must use a short side road onto a short 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.
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. Origional sections of SR 20 can be found in the town of Mooresville, with an unusually wide two way road that is clearly visible from aerial views. The old section becomes a divided highway before eventually merging into an access road that parallels I565 up to Greenbrier.[2]
| County | Location | mi[1] | km | Destinations | Notes |
|---|---|---|---|---|---|
| Lauderdale | | 0.000 | 0.000 |  SR 69 north – Savannah | Tennessee state line |
| | 7.645 | 12.303 | Natchez Trace Parkway | Interchange | |
| | 17.162 | 27.620 |      SR 133 south (Cox Creek Parkway) to US 43 north / US 72 east – Athens, Joe Wheeler State Park | ||
| Florence | 22.048 | 35.483 |   US 43 north / US 72 east / SR 13 north / SR 17 north (SR 2 east) – Port of Florence | Western end of US 43/US 72/SR 2/SR 13/SR 17 concurrency; interchange | |
| Tennessee River | 22.795 | 36.685 | O'Neal Bridge | ||
| Colbert | Sheffield–Muscle Shoals line | 24.475 | 39.389 |  SR 184 east (Second Street) – Muscle Shoals, Sheffield | |
| Tuscumbia–Muscle Shoals line | 27.803 | 44.745 |  US 43 south / SR 13 south / SR 17 south / US 72 west (SR 2) – Corinth | Eastern end of US 43/US 72 concurrency; western end of US 72 Alt. concurrency | |
| | 29.870 | 48.071 |     SR 133 north / SR 157 north (Wilson Dam Road) / CR 57 south – Airport | Western end of SR 157 concurrency | |
| | 32.189 | 51.803 | SR 157 south – Moulton, Cullman | Eastern end of SR 157 concurrency; no left turn westbound | |
| Lawrence | Town Creek | 43.103 | 69.368 |  SR 101 – Lexington, Hatton, Wheeler Dam, Joe Wheeler State Park | |
| Courtland | 50.609 | 81.447 |  SR 33 south – Moulton, Courtland Historic District | ||
| Morgan | | 65.780 | 105.863 |  SR 67 south (Beltline Road) | |
| Decatur | 69.147 | 111.281 |  US 31 south (6th Avenue / SR 3) – Hartselle | Western end of US 31/SR 3 concurrency | |
| Morgan Limestone | 68.484 | 110.214 | Steamboat Bill Memorial Bridges over Tennessee River | ||
| Limestone | 72.130 | 116.082 | US 31 north (SR 3) – Athens, Calhoun Community College | Eastern end of US 31/SR 3 concurrency; interchange | |
| 73.135 | 117.699 |    CR 3 north (Bibb Garrett Lane) / CR 113 south (Mitchell Road) | Future business district in northern Decatur, possibly future I565 exit | ||
| Limestone | Decatur–Huntsville line | 73.978 | 119.056 | I-65 – Nashville, Birmingham I-565 east / US 72 Alt. east – Huntsville | Eastern terminus and signed as exits 1A (south) and 1B (north); I-65 north exit 340, south exit 340A-B |
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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Several sections of Old Highway 20 still exist:
Corridor V is part of the Appalachian Development Highway System and follows the path of SR 20 between Decatur and the eastern Terminus at I-65.
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