Interstate 20
Interstate 20
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Interstate 20

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Interstate 20

Interstate 20 (I‑20) is a major east–west Interstate Highway in the Southern United States. I-20 runs 1,539 miles (2,477 km) beginning at an interchange with I-10 in Reeves County, Texas, 40 miles (64 km) east of Van Horn, Texas, and ending at an interchange with I-95 in Florence, South Carolina. Between Texas and South Carolina, I-20 runs through northern Louisiana, Mississippi, Alabama, and Georgia. The major cities that I-20 connects to include Dallas-Fort Worth, Texas; Shreveport, Louisiana; Jackson, Mississippi; Birmingham, Alabama; Atlanta, Georgia; and Columbia, South Carolina.

From its terminus at I-95, the highway continues about two miles (3.2 km) eastward into the city of Florence as I-20 Business (I-20 Bus.).

I-20 runs from Texas to South Carolina serving major southern economic hubs such as Dallas–Fort Worth and Atlanta.

I-20 begins in western Reeves County at a fork with I-10. From there, the highway travels east-northeastward through Odessa, Midland, and Abilene before turning eastward toward the Dallas–Fort Worth metroplex. The La Entrada al Pacífico corridor runs along I-20 between US Route 385 (US 385) and Farm to Market Road 1788 (FM 1788). Between Monahans and I-10, I-20 has an 80-mile-per-hour (130 km/h) speed limit.

From the highway's opening in the 1960s through 1977, I-20 originally went through the heart of the metroplex via the Dallas–Fort Worth Turnpike. This old route is now signed I-30 (Dallas–Fort Worth Turnpike and from US 80/I-30 intersection at Mesquite to Downtown Dallas), US 80 (former stretch between I-635 and Terrell), and Spur 557 (bypass around Terrell). In 1977, I-20 was rerouted to go through the southern sections of Fort Worth, Arlington, Grand Prairie, Dallas, and Mesquite. It split off from the old route initially at I-820 in west Fort Worth the later on at its current junction near Aledo in Parker County. It rejoins the old route near Terrell. Part of I-20 in Dallas used to be signed as I-635 and shares the Lyndon B. Johnson Freeway name with the remainder of I-635. Parts on the south side of Fort Worth were originally signed as I-820.

I-20 continues eastward from Terrell, bypassing Tyler, Longview, and Marshall before crossing the Louisiana border near Waskom.

In Louisiana, I-20 roughly parallels US 80 through the northern part of the state.

Entering the state from near Waskom, Texas, the highway immediately enters the Shreveport–Bossier City metropolitan area, intersecting I-49 near downtown Shreveport and passing close to Barksdale Air Force Base in Bossier City.

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