Louisiana Highway 20
|Maintained by Louisiana DOTD|
|Length:||36.6 mi (58.9 km)|
|Existed:||1955 renumbering – present|
|West end:||LA 182 in Gibson|
|LA 3127 in North Vacherie|
|East end:||LA 18 in North Vacherie|
|Parishes:||Terrebonne, Lafourche, St. James|
From the south, LA 20 begins at LA 182 in the northwest Terrebonne Parish town of Gibson. The road parallels then intersects U.S. 90 (Future I-49) at two locations (Exits 189 & 194) as it heads northeastward, where it intersects LA 24 in Schriever. LA 20 turns due north and intersects LA 1[disambiguation needed] in Thibodaux as it continues northward. The road then passes through Chackbay before it enters St. James Parish. LA 20 runs northward through South Vacherie and ends at an intersection with LA 18 in North Vacherie.
In 1972, LA 20 was routed off of Jackson Street in downtown Thibodaux and onto parallel Canal Boulevard, a four-lane, largely residential thoroughfare. The extension of Canal Boulevard north of Bayou Lafourche was to be opened soon, bypassing St. Patrick Street. The route change was opposed by Thibodaux's mayor, Warren Harang, and the Louisiana Department of Highways agreed to keep truck traffic routed via Jackson Street, which was retained as LA 20 Spur. By the late 1990s, LA 20 was routed back onto Jackson Street, reinstating a short concurrency with LA 1 from St. Mary Street to West 1st Street and utilizing LA 308 to connect with North Canal Boulevard.
In Vacherie, LA 20 originally turned east along LA 18 and crossed the Mississippi River by ferry to Lutcher. It then followed what is now LA 3274 to a terminus at US 61 (Airline Highway). The ferry service was replaced by the newly-opened Gramercy Bridge (or Veterans Memorial Bridge) in May 1995, and LA 20 was truncated to its present terminus in Vacherie two years later.
||Gibson||0.0||0.0||LA 182 (Bayou Black Drive)||Western terminus|
|0.6||1.0||Bridge over Tiger Bayou|
|1.2||1.9||US 90 – Morgan City, New Orleans||Exit 189 (U.S. 90)|
|1.7||2.7||Bridge over Tiger Bayou|
|Chacahoula||5.6||9.0||LA 309 north (Brule Guillot Road)||Southern terminus of LA 309|
|5.9||9.5||US 90 – Morgan City, New Orleans||Exit 194 (U.S. 90)|
||No major junctions|
||Schriever||12.5||20.1||LA 24 east (Main Street, Park Avenue) – Houma||Interchange;
Western terminus of LA 24
|12.7||20.4||BNSF/Union Pacific Railroad overpass|
|13.7||22.0||LA 3185 (Elizabeth Street)||Southeastern terminus of LA 3185|
|14.8||23.8||LA 648 (Percy Brown Road)||Southwestern terminus of LA 648|
||Thibodaux||15.1||24.3||LA 3107 (Talbot Avenue)||Eastern terminus of LA 3107|
|16.4||26.4||LA 1 north (St. Mary Street) – Napoleonville||West end of LA 1 concurrency|
|16.5||26.6||LA 1 south (West 1st Street) – Raceland||East end of LA 1 concurrency|
|16.5||26.6||St. Patrick Bridge over Bayou Lafourche|
|16.6||26.7||LA 308 north (Bayou Road) – Napoleonville||West end of LA 308 concurrency|
|16.9||27.2||LA 308 south (Bayou Road) – Raceland||East end of LA 308 concurrency|
|Chackbay||22.7||36.5||LA 304||Northeastern terminus of LA 304|
|24.2||38.9||Bridge over Grand Bayou|
|27.7||44.6||LA 307 south – Kraemer||Northern terminus of LA 307|
|Lafourche-St. James line
||Chackbay-South Vacherie line||28.9||46.5||Bridge over Bayou Chevreuil|
||South Vacherie||31.6||50.9||LA 643 east – Lac Des Allemands||Western terminus of LA 643|
|32.0||51.5||LA 644 east||Western terminus of LA 644|
|North Vacherie||33.9||54.6||LA 3127 – Donaldsonville, Boutte|
|36.6||58.9||LA 18 (River Road) – Donaldsonville, Luling / Mississippi River Bridge||Eastern terminus|
- Microsoft. Bing Maps – Map of LA 20 (Map). Cartography by Nokia. http://www.bing.com/maps/default.aspx?mapurl=http://en.wikipedia.org/w/index.php?title=Template:Attached_KML/Louisiana_Highway_20&action=raw. Retrieved November 5, 2012.
- "Truck traffic route changed in Thibodaux". Morning Advocate (Baton Rouge). December 29, 1972. p. 16A.
- Louisiana Department of Highways (1953). Lafourche Parish (North Section) (Map). Cartography by Department of Highways Traffic and Planning Section (January 1, 1958 ed.).
- Louisiana Department of Highways (1976). Louisiana (Map). Cartography by Louisiana Department of Highways.
- Shearer Publishing (1997). The Roads of Louisiana (Map). Cartography by Shearer. p. 75.
- Louisiana Department of Transportation and Development (1998). Lafourche Parish (West Section) (Map). Cartography by Office of Planning and Programming.
- "Act No. 40, House Bill No. 311". State-Times (Baton Rouge). June 18, 1955. p. 3B–4B.
- Louisiana Department of Highways (1953). St. James Parish (Map). Cartography by Department of Highways Traffic and Planning Section (January 1, 1958 ed.).
- Bell, Rhonda; Hyman, Vicki (May 5, 1995). "St. John, St. James link open". The Times-Picayune (New Orleans). p. A1.
- Louisiana Department of Transportation and Development (1999). St. James Parish (Map). Cartography by Office of Planning and Programming.