Interstate 12 (I-12) is an intrastate Interstate Highway located entirely within the US state of Louisiana. It spans a total of 85.59 miles (137.74 km) in an east–west direction from I-10 in Baton Rouge to an interchange with both I-10 and I-59 in Slidell. Along the way, it passes through the city of Hammond, where it intersects I-55 and US Route 51 (US 51). It also serves the cities of Ponchatoula and Denham Springs, as well as the St. Tammany Parish cities of Covington and Mandeville.
Western terminus in Baton Rouge
I-12's eastbound exit to LA 1249, which leads to the communities of Baptist and Pumpkin Center
At the bottom of I-12's eastbound ramp to LA 59, travelers also find a shield for the unrelated I-59, some 20 miles (32 km) farther east
Interstate 10 in Louisiana
Interstate 10 (I-10), a major transcontinental Interstate Highway in the Southern United States, runs across the southern part of Louisiana for 274.42 miles (441.64 km) from Texas to Mississippi. It passes through Lake Charles, Lafayette, and Baton Rouge, dips south of Lake Pontchartrain to serve the New Orleans metropolitan area, then crosses Lake Pontchartrain and leaves the state.
I-10 running west of New Orleans, spanning the Bonnet Carre Spillway at Lake Pontchartrain
I-10 eastbound passing over Lake Charles/Calcasieu River near Lake Charles
Until around 1960, I-10 and I-59 would have split near the present I-510 interchange in eastern New Orleans.
Atchafalaya Swamp Freeway in Iberville Parish
