Route 84 is a highway in the Missouri

Missouri

Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

 bootheel. It starts at the 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...

 state line west of Kennett

Kennett, Missouri

Kennett is a city in Dunklin County, Missouri, United States. The population was 11,260 at the 2000 census, but a 2008 estimate indicates a 4.9% decrease in population to 10,707. Kennett is the county seat of Dunklin County...

 and ends at Interstate 155

Interstate 155 (Missouri-Tennessee)

Interstate 155 is an east–west spur beginning in far southeast Missouri. The western terminus is south of Hayti, Missouri at Interstate 55, exits 17A and exit 17B . The route proceeds east to the Tennessee border, where it crosses over the Mississippi River...

/U.S. Route 412 south of Caruthersville

Caruthersville, Missouri

Caruthersville is the most populous city and county seat of Pemiscot County, located along the Mississippi River in the bootheel of southeastern Missouri in the United States. The population was 6,760 at the 2000 census.-History:...

.

Route description

Arkansas Highway 90 crosses into Missouri at Kennett

Kennett, Missouri

Kennett is a city in Dunklin County, Missouri, United States. The population was 11,260 at the 2000 census, but a 2008 estimate indicates a 4.9% decrease in population to 10,707. Kennett is the county seat of Dunklin County...

 and proceeds eastward. It crosses through the center of the city, passing north of the Kennett Memorial Airfield. Roughly 5 miles into its course, Route 84 becomes concurrent

Concurrency (road)

A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different highway, motorway, or other route numbers...

 with US 412

U.S. Route 412

U.S. Route 412 is an east–west United States highway, first commissioned in 1982. Its route number is a "violation" of the usual AASHTO numbering scheme, as it comes nowhere near its implied "parent", US 12. U.S...

. The two highways serve as the southern terminus of Route 25 and, in Bragg City

Bragg City, Missouri

Bragg City is a city in Pemiscot County, Missouri, United States. The population was 189 at the 2000 census.-Geography:Bragg City is located at .According to the United States Census Bureau, the town has a total area of , all land.-Demographics:...

, parallel the southern border of the Little River Conservation Area. The roads remain concurrent until Hayti

Hayti, Missouri

Hayti is a city in Pemiscot County, Missouri, United States. The population was 3,207 at the 2000 census.In 1955, a small earthquake broke windows in the village.- Geography :Hayti is located at ....

, when US 412 splits off to the southeast. Route 84 intersects a concurrency between US 61 and I-55

Interstate 55 in Missouri

In the U.S. state of Missouri, Interstate 55 runs from the Arkansas state line to the Poplar Street Bridge over the Mississippi River in St. Louis.-Route description:...

 as it also turns towards the southeast.

As the highway approaches the Missouri River

Missouri River

The Missouri River flows through the central United States, and is a tributary of the Mississippi River. It is the longest river in North America and drains the third largest area, though only the thirteenth largest by discharge. The Missouri's watershed encompasses most of the American Great...

 and enters Caruthersville

Caruthersville, Missouri

Caruthersville is the most populous city and county seat of Pemiscot County, located along the Mississippi River in the bootheel of southeastern Missouri in the United States. The population was 6,760 at the 2000 census.-History:...

, it turns southward. It ultimately ends at I-155

Interstate 155 (Missouri-Tennessee)

Interstate 155 is an east–west spur beginning in far southeast Missouri. The western terminus is south of Hayti, Missouri at Interstate 55, exits 17A and exit 17B . The route proceeds east to the Tennessee border, where it crosses over the Mississippi River...

/US 412. Route 84's 30.1-mile path is located entirely within the Bootheel

Bootheel

The Missouri Bootheel is the southeasternmost part of the state of Missouri, extending south of 36°30’ north latitude, so called because its shape in relation to the rest of the state resembles the heel of a boot. Strictly speaking, it is composed of the counties of Dunklin, New Madrid, and Pemiscot...

 region and spans two counties: Dunklin

Dunklin County, Missouri

Dunklin County is a county located in the Bootheel of Southeast Missouri in the United States. As of the 2000 U.S. Census, the county's population was 33,155. A 2008 estimate, however, showed the population to be 31,454. The largest city and county seat is Kennett...

 and Pemiscot

Pemiscot County, Missouri

Pemiscot County is a county located in the Bootheel in Southeast Missouri in the United States. As of the 2000 U.S. Census, the county's population was 20,047. A 2008 estimate, however, showed the population to be 18,515. The largest city and county seat is Caruthersville...

.

History

Between 1976 and 1977, the east end of Route 84 was extended slightly to meet I-155. US 412, and by extension its concurrency with Route 84, came into being in the area by 1986.