Louisiana Highway 433

From the west, LA 433 begins at a junction with U.S. Route 190 (US 190) near the North Shore Square mall and heads south. At this point, the roadway is also known as Thompson Road. After about two miles (3.2 km), the road crosses Bayou Liberty and turns eastward, becoming Bayou Liberty Road. As the road nears downtown Slidell, it crosses Bayou Bonfouca via a drawbridge and becomes a four-lane divided highway. Shortly thereafter, the road joins US 11 and heads southward for about a quarter of a mile before departing eastward along the Old Spanish Trail. LA 433 then intersects Interstate 10 via a diamond interchange (exit 263). Afterward it narrows to two lanes and winds through the swamps of southeast St. Tammany Parish. Heading southeastward, the highway is duly known as Rigolets Road and the Old Spanish Trail at this point. LA 433 ends at a junction with US 90 just north of the Rigolets.

LA 433 is an undivided, two-lane highway from US 190 to US 11. The route then widens to an undivided, five-lane roadway (with a middle turning lane) while concurrent with US 11. LA 433 narrows slightly to a divided, four-lane road from US 11 to just east of I-10. From just east of I-10 to its terminus at US 90, LA 433 is an undivided, two-lane highway.

The entire highway is in St. Tammany Parish.

Location	mi[1]	km	Destinations	Notes
​	0.0	0.0	US 190 (Gause Boulevard West)
Slidell	6.4	10.3	US 11 (Front Street)	West end of US 11 overlap
	6.7	10.8	US 11 (Pontchartrain Drive)	East end of US 11 overlap
	8.4– 8.6	13.5– 13.8	I-10 – New Orleans, Bay. St. Louis, MS	Exit 263 (I-10)
​	14.8	23.8	US 90 / South 5th Street
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

• LADOTD Official Control Section Map - District 62
  • Eastern St. Tammany Parish Highway Map
• Louisiana State Highway Log