Atchafalaya Basin Bridge, Road bridge in Louisiana, United States

The Atchafalaya Basin Bridge, also called the Louisiana Airborne Memorial Bridge, is a pair of parallel bridges carrying Interstate 10 over the Atchafalaya Basin between Baton Rouge and Lafayette. Its two reinforced concrete decks rise and fall in a long hump over the water, each resting on vertical concrete piers, with a low concrete barrier along the outer edge. The decks run parallel for most of their length but merge where they cross the Whiskey Bay Pilot Channel and the Atchafalaya River. Total length is 96,095 feet (29,290 m).

Construction began in 1971 and the bridge opened to the public in 1973, when it was the second longest bridge in the United States after the Lake Pontchartrain Causeway. On July 10, 1989, Act 793 renamed it the Louisiana Airborne Memorial Bridge, following a petition by the Acadiana Chapter of the 82nd Airborne Division Association.

The bridge's second name, Louisiana Airborne Memorial Bridge, was adopted on July 10, 1989, when the state legislature passed Act 793 after a petition by the Acadiana Chapter of the 82nd Airborne Division Association, founded in Lafayette in January 1980. The chapter raised funds for a monument to the division at the mile 121 visitor center, dedicated on October 20, 1990.

Trucks stay in the right lane with a speed limit of 55 mph, while other vehicles may use both lanes up to 60 mph. Drivers looking for rest stops should plan around the two exits at Whiskey Bay and Butte La Rose.

The bridge carries Interstate 10 and has only two exits, at Whiskey Bay (LA 975) and Butte La Rose (LA 3177), so a breakdown means a long wait in a sparsely inhabited basin. Public cameras watch the roadway at mile markers 121, 124.5, 127, 131.5 and 135.