West
The first confirming marker for Interstate 12 west. I-12 was expanded to six lanes between I-10/59 and Exit 83 in 2012.
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U.S. 11 separates from I-59 at the town of Pearl River to the north. Continuing south, U.S. 11 passes through St. Joe and Alton ahead of the folded diamond interchange at Exit 83.
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Paralleling a Norfolk Southern Railroad line, U.S. 11 heads south from Exit 83 into Slidell along Front Street.
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Brownswitch Road stems 1.34 miles east from the exchange joining I-12 with U.S. 11 to a roundabout with LA 1091 (Robert Boulevard). U.S. 11 travels south to Downtown Slidell and then across Lake Pontchartrain on the Maestri Bridge.
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Northshore Boulevard stems 0.61 miles north from parallel U.S. 190 to the diamond interchange at Exit 80.
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Airport Road extends 2.21 miles north from Exit 80 to Slidell Municipal Airport (ASD).
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Interstate 12 crosses Liberty Bayou at this confirming marker.
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LA 434 connects with Interstate 12 north from the census designated place of Lacombe.
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North from I-12, LA 434 continues 5.7 miles to LA 36 at St. Tammany Corner.
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The diamond interchange (Exit 68) with LA 1088 opened to traffic in 2011.
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LA 1088 angles 9.75 miles southwest from LA 36 to LA 59 in Mandeville.
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LA 59 converges with Interstate 12 at Exit 65 north from Mandeville.
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LA 59 travels 8.38 miles north from U.S. 190 in Mandeville to a roundabout with LA 36 and LA 435 in the town of Abita Springs.
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The town of Abita Springs is home to the Abita Brewery, known around the state for the "TurboDog" and "Purple Haze" brews.1
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U.S. 190 parallels I-12 west from Slidell to Mandeville, where it turns north along a limited access expressway to Exit 63.
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U.S. 190 transitions into a six lane, commercial boulevard north to U.S. 190 Business and LA 21 east of Downtown Covington.
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U.S. 190 encircles Covington to the north while turning west toward Hammond.
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U.S. 190 north to LA 21 leads to the Washington Parish seat of Bogalusa.
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Exit 63 B departs I-12 west for U.S. 190 west. A directional cloverleaf interchange joins the two freeways.
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Causeway Boulevard extends south from U.S. 190/LA 22 at Mandeville to Lake Pontchartrain Causeway. The 24.16 mile long toll bridge leads to Metairie west of New Orleans.
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Supporting adjacent commercial development, Exit 60 to Pinnacle Parkway and E Brewster Road opened in 2009.
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A 52.03 mile long highway south from Mississippi Highway 35, LA 21 travels to Bogalusa, Sun, Covington and U.S. 190 in Madisonville.
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LA 21 south to U.S. 190 east across the Tchefuncte River leads to Fairview Riverside State Park.
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The diamond interchange (Exit 59) with LA 21 lines a commercial strip just north of the River Chase retail center.
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