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Interstate 12

Total length: 85 miles (137 km)
Western terminus: Baton Rouge, LA, at JCT I-10
Eastern terminus: Slidell, LA, at JCT I-10/I-59

States traversed & length in each:

• Louisiana — 85 miles (137 km)

Major cities along route:

• Baton Rouge, LA
• Hammond, LA

Junctions with non-related Interstates:

• Interstate 10: Western terminus in Baton Rouge, LA
• Interstate 55: Exit 38 in Hammond, LA
• Interstate 10: Eastern terminus in Slidell, LA
• Interstate 59: Eastern terminus in Slidell, LA

Related loops and spurs:

NONE

Length I’ve traveled: Entire length

Time zones:
Central — Entire length

Counties traversed:
Louisiana (Parishes) — East Baton Rouge, Livingston, Tangipahoa, St. Tammany

A quick hypertext drive: Interstate 12 largely serves as a through-traffic Interstate 10 bypass for traffic not needing to go through New Orleans. The entire route is flat, and outside of a short six-lane section in eastern Baton Rouge, I-12 carries four lanes and is otherwise non-descript. The interchange at the eastern terminus in Slidell allows eastbound I-12 traffic to follow a right-side ramp to westbound I-10 (back toward New Orleans); proceed straight to eastbound I-10 toward Mississippi; or follow a cloverleaf loop ramp to access northbound I-59, which also terminates at that interchange.

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