Louisiana Highway 20 (LA 20) is a state highway that serves Terrebonne Parish, Lafourche Parish, and St. James Parish. It spans a total of 39.07 miles as a two lane, undivided road.
Route description
From the south, LA 20 begins at an exit from U.S. Highway 90 in northwest Terrebonne Parish and heads northeastward, where it intersects LA 24 in Schriever and turns due north. LA 20 intersects LA 1 in Thibodaux as it continues northward. LA 20 then passes through Chackbay before it enters St. James Parish. LA 20 runs northward through South Vacherie and dead ends at an intersection with LA 18 in North Vacherie.