U.S. Route 51orU.S. Highway 51 (US 51) is a major south–north United States highway that extends 1,277 miles (2,055 km) from the western suburbs of New Orleans, Louisiana, to within 150 feet (46 m) of the Wisconsin–Michigan state line. As most of the United States Numbered Highways ending with "1", it is a cross-country north–south route extending from the Gulf Coast region to the Great Lakes region. Much of the highway in northern Illinois and southern Wisconsin runs parallel to or is cosigned with Interstate 39 (I-39) and much of the route in several states also parallels the Illinois Central Railroad. From LaPlace, Louisiana, Mississippi, to Memphis, Tennessee, much of that portion of US 51 runs largely parallel or is concurrent with Interstate 55 (I-55). The highway's northern terminus is between Hurley, Wisconsin, and Ironwood, Michigan, where it ends with a roundaboutatUS 2. Its southern terminus is in Laplace, Louisiana, ending at US 61. US 51 is routed through the states of Louisiana, Mississippi, Tennessee, Kentucky, Illinois, and Wisconsin.
U.S. Route 51 | ||||
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US 51 highlighted in red
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| Route information | ||||
| Length | 1,277 mi[1] (2,055 km) | |||
| Existed | November 11, 1926 (1926-11-11)[2]–present | |||
| Major junctions | ||||
| South end |  US 61inLaPlace, LA | |||
| Major intersections |
 I-20inJackson, MS  I-40 / I-69inMemphis, TN I-57atCairo, IL I-64atRichview, IL I-70inVandalia, IL  I-55 / I-74inBloomington, IL I-80inLa Salle, IL I-90inCherry Valley, IL  I-39 / I-90 / I-94inDeForest, WI | |||
| North end |  US 2 near Hurley, WI | |||
| Location | ||||
| Country | United States | |||
| States | Louisiana, Mississippi, Tennessee, Kentucky, Illinois, Wisconsin | |||
| Highway system | ||||
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In addition to singing about US 61 on his album Highway 61 Revisited, musician Bob Dylan also commemorated US 51, covering the folk song "Highway 51 Blues", earlier recorded by both Curtis Jones and Tommy McClennan, on his eponymous album Bob Dylan. The North Mississippi Allstars also paid tribute to the highway in the title track of their album 51 Phantom.
In Memphis, Tennessee, all of US 51 south of South Parkway East was renamed from Bellevue Boulevard to Elvis Presley Boulevard on January 17, 1972. Graceland is located on this section of the highway, in the subdivision of Whitehaven.
In 2004, the six states that US 51 traverses banded together as the Explore Hwy 51 Coalition to help promote this "All-American Road". The group now offers visitor information for traveling the length of the road.[3]
US 51 begins at the intersection with US 61inLaplace and heads northeast. It intersects I-10 before running concurrently with I-55. Near the interchange with I-12, the route splits from I-55. It intersects US 190inHammond and remains running parallel with I-55 before entering Mississippi. In the 1930s, this highway was called Jefferson Davis Highway.[4]
US 51 enters Mississippi from LouisianainOsyka and runs parallel with I-55. It intersects US 98inMcComb and US 84 south of Brookhaven. Northwest of Crystal Springs, it runs concurrently with I-55 and then splits at the interchange with I-20inJackson. The highway then runs through Jackson, intersecting US 80. Outside Ridgeland, it passes under I-55 as it continues northeast. It continues through Canton, Pickens, Goodman, and Durant. The highway continues to run along I-55, intersecting US 82inWinona and US 278inBatesville. The route passes under I-69 before entering Tennessee.
The Mississippi section of US 51 is defined at Mississippi Code Annotated § 65-3-3.
US 51 enters Tennessee from Mississippi and travels through Memphis. It intersects I-55 and then I-240 before intersecting US 78. It then runs concurrently with US 79 before intersecting I-69. As it exits Memphis, it intersects I-40 and heads northeasterly. In Dyersburg, it runs concurrently with US 412 for a half a mile before intersecting I-155's eastern terminus. US 51 then continues northeasterly before entering Kentucky. US 51 between Memphis and Kentucky is planned on running concurrently with I-69.
US 51 enters Kentucky at Fulton, running concurrently with I-69 and continues northward through the towns of Clinton, Bardwell and Wickliffe to the Ohio River. The route intersects and runs concurrently with US 62 before separating from it in Cairo. Along the way it also intersects US 60. The route then enters Illinois before running concurrently with I-57.
US 51 enters Illinois from Kentucky at the city of Cairo. The route heads northward to a village near Cairo called Mounds, and shares the pavement with I-57, following it for 24 miles (39 km) to Dongola, before splitting and heading north. The route remains two lanes from Dongola to just before Assumption with the exception of a 10-mile (16 km) section between Centralia and I-64.
North of Assumption, US 51 becomes an expressway to Decatur. In Decatur, US 51 follows I-72 to bypass town. US 51 leaves I-72 after eight miles (13 km), and heads north to Bloomington–Normal as an expressway. At Bloomington–Normal, US 51 follows I-74 for a mile, then I-55 for seven miles (11 km), before following I-39 for 140 miles (230 km).
US 51 follows I-39, intersecting I-80 and I-88 along the way. The highway also follows US 20 south of Rockford (while still following I-39). I-39/US 51 joins I-90, making US 51 one of the only toll roads in Illinois that is a U.S. Highway. US 51 exits I-39/I-90 just a mile south of the Wisconsin state line. US 51 follows Illinois Route 75 (IL 75) west to the intersection of IL 251, then turns north through South Beloit to enter Wisconsin.
In the state of Wisconsin, US 51 enters from IllinoisatBeloit. US 51 splits off from I-39/I-90 in South Beloit, Illinois, and continues northward through Janesville and Edgerton. In Edgerton, US 51 rejoins I-39/I-90 for 3.5 miles (5.6 km) before splitting off towards Stoughton and McFarland. US 51 runs almost parallel to I-39/I-90 through the eastern portion of Madison, crosses the Interstate in DeForest, and finally rejoins I-39 again at Portage. US 51 runs concurrently with I-39 until I-39's terminus in Wausau and continues on as a mixture of freeway and expressway until just north of the interchange with US 8. From there through Hazelhurst, US 51 is a two-lane road with sporadic three-lane sections (which were constructed in 2008). US 51 expands to four lanes, with a central fifth turn lane from Hazelhurst to Arbor Vitae; north of Arbor Vitae it returns to two lanes and continues to its northern end in Hurley, where it terminates at US 2.
US 61inLaPlace
I-10 in LaPlace I-55 northeast of LaPlace. The highways travel concurrently to Hammond.
US 190 in Hammond
US 98inMcComb
US 84 south of Brookhaven I-55inCrystal Springs. The highways travel concurrently to Jackson. 
I-20 / US 49 in Jackson. The highways travel concurrently through the city.
US 80 in Jackson
US 82inWinona
US 278inBatesville 
I-55 / Future I-69inMemphis
US 78 in Memphis
US 64 / US 70 / US 72 / US 79 in Memphis. US 51/US 64/US 70/US 79 travels concurrently through the city.
I-240 in Memphis I-40 in Memphis Future I-69 in Memphis
Future I-269inMillington
US 412inDyersburg. The highways travel concurrently through the city. 
Future I-69 / I-155 / US 412 in Dyersburg. I-69/US 51 travels concurrently to southwest of Troy.
US 45W northeast of Union City. The highways travel concurrently to South Fulton.
US 45 / US 45E in South Fulton Future I-69inFulton. The highways travel concurrently through the city.
US 62inBardwell. The highways travel concurrently to Cairo, Illinois.
US 60inWickliffe. The highways travel concurrently to Cairo, Illinois. I-57 in Cairo. The highways travel concurrently to near Dongola. I-64inRichview
US 50inSandoval. The highways travel concurrently through the village.
US 40inVandalia Township. The highways travel concurrently to Vandalia. I-70 in Vandalia
US 36inHarristown
I-72 in Harristown. The highways travel concurrently to Decatur. I-74inBloomington Township. The highways travel concurrently to northwest of Normal. I-55inBloomington. The highways travel concurrently to Normal.
US 150 in Bloomington I-39 / I-55 in Normal. I-39/US 51 travels concurrently to South Beloit.
US 24inEl Paso
US 6inLaSalle I-80 in LaSalle
US 52 on the Troy Grove–Ophir township line
US 34inMendota Township
US 30 on the Amboy–Franklin Grove township line
I-88inDement Township
US 20inRockford. The highways travel concurrently to Cherry Valley. I-90 in Cherry Valley. The highways travel concurrently to South Beloit.
US 14 in the Town of Janesville I-39 / I-90 in the Town of Albion. The highways travel concurrently through the town.
US 12 / US 18inMadison
US 151 in Madison I-39 / I-90 / I-94 in the Town of Burke I-39 in the Town of Fort Winnebago. The highways travel concurrently to the Town of Rib Mountain.
US 10inStevens Point. The highways travel concurrently to the Town of Hull.
US 8 in the Town of King US 2 in the Town of Kimball
