Louisiana Highway 309

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Louisiana Highway 309 marker

Louisiana Highway 309
Brule Guillot Road
Route information
Maintained by Louisiana DOTD
Length: 8.5 mi[1] (13.7 km)
Existed: 1955 renumbering – present
Major junctions
South end: LA 20 in Chacahoula
  US 90 in Chacahoula
North end: LA 1 west of Thibodaux
Parishes: Terrebonne, Lafourche
Highway system
  • Louisiana Highway System
LA 308 I‑310

Louisiana Highway 309 (LA 309) is a state highway in Louisiana that serves Terrebonne and Lafourche Parishes. It spans 8.5 miles (13.7 km) in a north-south direction along Brule Guillot Road between Chacahoula and a point west of Thibodaux.[1]

Route description[edit]

From the south, LA 309 begins at a junction with LA 20 in an area of unincorporated Terrebonne Parish east of Gibson known as Chacahoula. Proceeding northward, LA 309 immediately crosses the BNSF/Union Pacific Railroad tracks at grade and passes underneath the elevated U.S. 90 (future corridor of I-49). (LA 20 intersects U.S. 90 just east of LA 309's southern terminus.) LA 309 crosses into Lafourche Parish and continues through uninhabited swamp for roughly half of its route. It then encounters a transition to farmland and residential subdivisions as it approaches the outskirts of Thibodaux.

About 1.5 miles from its northern terminus, LA 309 intersects LA 3107 (Talbot Avenue). In an area known as Brule west of Thibodaux, LA 309 reaches its end at an intersection with LA 1 which runs alongside Bayou Lafourche.

Major intersections[edit]

Parish Location Mile[1] km Destinations Notes
Terrebonne Chacahoula 0.0 0.0 LA 20 – Gibson, Thibodaux Southern terminus
Lafourche   3.8 6.1 Bridge over Phillips Canal
Brule 7.0 11.3 LA 3107 (Talbot Avenue) Western terminus of LA 3107
8.5 13.7 LA 1 – Napoleonville, Thibodaux Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


External links[edit]

Route map: Google / Bing