What is manchac swamp bridge?

The Manchac Swamp Bridge, also known as the I-55 Manchac Swamp Bridge, is a bridge in Louisiana that spans the Manchac Swamp, which is the largest wetland in the state. The bridge is a part of Interstate 55 and is located near Ponchatoula, between New Orleans and Baton Rouge.

The bridge was completed in 1979 and is one of the longest bridges in the United States, with a total length of 22.8 miles (36.7 km). It is a dual-span bridge that carries traffic in both directions over the swamp. The bridge is known for its scenic views of the wetlands below and is a popular spot for birdwatching and wildlife viewing.

The Manchac Swamp Bridge is a critical transportation link in the region, providing a connection between the two major cities of New Orleans and Baton Rouge. It also serves as an important hurricane evacuation route for residents of the area.

Overall, the Manchac Swamp Bridge is a well-known structure in Louisiana, both for its engineering feat and its natural beauty.