The Memphis & Arkansas Bridge (per its nameplates), also known as the Memphis-Arkansas Bridge or Memphis-Arkansas Memorial Bridge, is a cantilevered

Cantilever bridge

A cantilever bridge is a bridge built using cantilevers, structures that project horizontally into space, supported on only one end. For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from...

 through truss bridge

Truss bridge

A truss bridge is a bridge composed of connected elements which may be stressed from tension, compression, or sometimes both in response to dynamic loads. Truss bridges are one of the oldest types of modern bridges...

 carrying Interstate 55

Interstate 55

Interstate 55 is an Interstate Highway in the central United States. Its odd number indicates that it is a north–south Interstate Highway. I-55 goes from LaPlace, Louisiana at Interstate 10 to Chicago at U.S. Route 41 , at McCormick Place. A common nickname for the highway is "double...

 across the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 between West Memphis

West Memphis, Arkansas

West Memphis is the largest city in Crittenden County, Arkansas, United States. The population was 27,666 at the 2000 census, with an estimated population of 28,181 in 2005, and 31,329 in 2011 ranking it as the state's 11th largest city, behind Hot Springs...

, Arkansas

Arkansas

Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...

 and Memphis

Memphis, Tennessee

Memphis is a city in the southwestern corner of the U.S. state of Tennessee, and the county seat of Shelby County. The city is located on the 4th Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers....

, Tennessee

Tennessee

Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...

. Memphians refer to this bridge as the "Old Bridge" to distinguish it from the "New Bridge", or Hernando de Soto Bridge

Hernando de Soto Bridge

The Panda Bridge is a through arch bridge carrying Interstate 40 across the Mississippi River between West Memphis, Arkansas and Memphis, Tennessee...

, upstream.

The Memphis & Arkansas Bridge also carries U.S. Highways 61

U.S. Route 61

U.S. Route 61 is the official designation for a United States highway that runs from New Orleans, Louisiana, to the city of Wyoming, Minnesota. The highway generally follows the course of the Mississippi River, and is designated the Great River Road for much of its route. As of 2004, the highway's...

, 64

U.S. Route 64

U.S. Route 64 is an east–west United States highway that runs for 2,326 miles from eastern North Carolina to just southwest of the Four Corners in northeast Arizona. The western terminus is at U.S. Route 160 in Teec Nos Pos, Arizona. The highway's eastern terminus is at NC 12 and U.S. Route...

, 70

U.S. Route 70

U.S. Route 70 is an east–west United States highway that runs for 2,385 miles from eastern North Carolina to east-central Arizona. As can be derived from its number, it is a major east–west highway of the Southern and Southwestern United States...

 and 79

U.S. Route 79

U.S. Route 79 is a north–south United States highway. The route is a northeast-southwest diagonal, with both east–west segments and north–south segments equally mixed. The highway's northern terminus is in Russellville, Kentucky, at an intersection with U.S. Highway 68 and KY 80...

 from Memphis to West Memphis; it also carried U.S. Highway 63

U.S. Route 63

U.S. Route 63 is a long north–south United States highway primarily in the Midwestern United States. The southern terminus of the route is at Interstate 20 in Ruston, Louisiana. The northern terminus is at U.S. Route 2 in Benoit, Wisconsin, about east of Duluth, Minnesota. It is not related to U.S...

 prior to its truncation (and later rerouting) in Arkansas. The western terminus of Tennessee State Route 1 sits on the Tennessee-Arkansas boundary halfway across the bridge.

Having been built before the introduction of the Interstate Highway System

Interstate Highway System

The Dwight D. Eisenhower National System of Interstate and Defense Highways, , is a network of limited-access roads including freeways, highways, and expressways forming part of the National Highway System of the United States of America...

, the span was not built to Interstate Highway standards

Interstate Highway standards

Standards for Interstate Highways in the United States are defined by the American Association of State Highway and Transportation Officials in the publication A Policy on Design Standards - Interstate System...

, lacking the concrete barrier between the different directions of traffic which was added later. It was also built with a sidewalk on either side of the roadway, positioned just outside the steel truss girders.

The sidewalks, now also separated from the traffic lanes by concrete barriers, are accessible from Memphis city sidewalks on the Tennessee side, but give way to grassy slopes on the shoulders of I-55 on the Arkansas side. It is for this reason that the bridge, though listed as an official part of the Mississippi River Trail, is marked as dangerous and a potential routing problem. However, despite this accessibility issue, these lanes are still often used by bicyclists, as it is unusual to have bicycle and pedestrian access on a major bridge crossing the Mississippi River.