Interstate 20 (I-20) is a part of the Interstate Highway System that spans 1,539.38 miles (2,477.39 km) from Reeves County, Texas, to Florence, South Carolina.^[2] Within the state of Louisiana, the highway travels 189.84 miles (305.52 km) from the Texas state line west of Greenwood to the Mississippi River,^[1] which it crosses into Vicksburg, Mississippi.

Quick Facts Route information, Length ...

Interstate 20
I-20 highlighted in red
Route information
Maintained by Louisiana DOTD
Length	189.844 mi[1][lower-alpha 1] (305.524 km)
Existed	1960–present
NHS	Entire route
Major junctions
West end	I-20 at Texas state line west of Greenwood, LA
Major intersections	US 79 in Greenwood I-220 / LA 3132 in Shreveport I-49 in Shreveport US 71 in Shreveport–Bossier City I-220 / LA 1267 in Bossier City Future I-69 near Haughton US 63 / US 167 in Ruston US 165 in Monroe US 425 in Rayville US 65 in Tallulah
East end	I-20 / US 80 at Mississippi state line west of Vicksburg, MS
Location
Country	United States
State	Louisiana
Parishes	Caddo, Bossier, Webster, Bienville, Lincoln, Ouachita, Richland, Madison
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Louisiana State Highway System Interstate US State Scenic
← LA 19 → LA 20

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I-20 traverses the northern portion of the state, serving the metropolitan areas of Shreveport–Bossier City and Monroe, as well as the smaller cities of Minden and Ruston. It entirely parallels the older U.S. Highway 80 (US 80) corridor through Louisiana. The route is mirrored by I-10, which traverses the southern portion of the state. The two are connected by I-49, the state's major north–south Interstate Highway.

I-20 enters Louisiana about 20 miles (32 km) east of Marshall, Texas, near Waskom. I-20 passes through Greenwood to the north of town, where US 80/US 79 serve as the main east–west highway. I-20 enters Shreveport about 5 miles (8.0 km) east of Greenwood. I-20 intersects I-220 (the north Shreveport bypass) and Louisiana Highway 3132 (LA 3132, the south Shreveport bypass) on the westside of the city. On the way to Downtown Shreveport, I-20 intersects US 171 and serves as the current northern terminus of I-49.

As I-20 leaves Shreveport, it passes through Bossier City where it shares an overlap with US 71. I-20 passes north of Barksdale AFB where it intersects I-220 with no access to the northern terminus of LA 1267 and heads east toward Monroe. On its way to Monroe, I-20 traverses mainly rural, hilly terrain as it passes through the towns of; Minden, Arcadia, Grambling, Ruston (where it intersects US 167), and West Monroe.

I-20 passes through Monroe, where it intersects US 165. East of Monroe, I-20 enters flatter terrain as it passes through Rayville, Delhi, and Tallulah. About 15 miles (24 km) east of Tallulah, I-20 crosses over the Mississippi River into Vicksburg, Mississippi.