Which is the longest bridge?
Pontchartrain lake road, or road, which consists of two parallel bridges that are of the longest bridges in the world and the total length.  in parallel with these pontchartrain bridges crossing the lake in southern Louisiana. The longest of the two bridges is 23.87 miles (38.42 km) long. Bridges supported by more than 9000 Huddling concrete. Bascule bridges feature extends over the channel 8 nautical miles (13 kilometers) south of the North Shore. The southern end of the road is in Metairie, Louisiana, a suburb of New Orleans. North ultimately is Mandeville, Louisiana.