Empty 18-Wheeler Flips on Bonnet Carré Bridge as 60 MPH Gusts Slam I-10

An empty tractor-trailer went over on its side atop the Bonnet Carré Spillway Bridge on I-10 West on Monday afternoon, as a line of severe thunderstorms pushed damaging straight-line winds across southeast Louisiana. The rollover happened around 2:40 p.m. near mile marker 212, right at the St. Charles and St. John the Baptist Parish line, and it shut down one of the region's busiest highway corridors for hours during the height of the storm.

The driver of the overturned truck suffered only minor injuries, according to WWL-TV, but Louisiana State Police closed westbound I-10 across the entire spillway for more than three hours as crews worked the scene. Traffic backed up for miles, stretching all the way to the I-310 split, before troopers reopened the bridge around 5:50 p.m. Video of the flipped truck also circulated nationally, with NBC News sharing footage of the rig on its side as the storm system moved through.

Storm Warnings Were Already in Effect

The crash unfolded while the National Weather Service in New Orleans had active severe thunderstorm warnings and a severe thunderstorm watch covering 12 southeast Louisiana parishes, per the same WWL-TV report. Forecasters had cautioned that the system could bring wind gusts up to 60 mph, heavy rain, and localized hail. The storm cluster was part of a broader system moving across southeast Louisiana and southern Mississippi under a Level 2 “Slight Risk” designation, and it knocked out power to thousands of Entergy customers, according to Newsradio WTAM 1100.

St. Charles Parish officials confirmed the overturned 18-wheeler was empty and carrying no cargo when the wind caught it, a detail WBRZ reports meteorologists and transport safety experts say makes high-profile commercial vehicles far more vulnerable to lateral gusts. Without cargo weighing it down, a large box trailer can act like a sail, catching crosswinds that a loaded truck would shrug off.

Second Truck Down on the Same Span in Weeks

This was not an isolated event on the Bonnet Carré corridor. Just 18 days earlier, on August 6, another box truck went off the same I-10 bridge near LaPlace and crashed into the swamp below, an incident that required a SWAT team to rappel down and rescue the trapped driver, as previously reported by WWL-TV. The back-to-back incidents have put fresh attention on how exposed the elevated roadway is during sudden wind events.

Opened in 1972, the I-10 Bonnet Carré Spillway Bridge stretches roughly 11 miles across Lake Pontchartrain, the spillway, and the surrounding wetlands, making it one of the longest elevated highway bridges in the country and a route that carries an estimated 50,000 vehicles a day, according to World Atlas. Because it runs entirely over open water and wetlands, the span offers no windbreaks or tree cover to shield vehicles from sudden lateral gusts.

Federal and State Rules Target High-Wind Driving

Federal Motor Carrier Safety Administration regulations require commercial drivers to use extreme caution in hazardous weather, reduce speed in high winds, and stop operating altogether if crosswinds make driving unsafe, according to a summary from Michigan Auto Law. The Louisiana Department of Transportation and Development also issues standing weather advisories warning that gusty, rapidly shifting winds pose severe hazards to high-profile vehicles such as box trucks, empty trailers, and buses, particularly on elevated bridges like the one over the spillway.

Investigators looking into commercial truck rollovers typically rely on electronic telematics data, vehicle weight records, and localized weather reports to determine whether speed, driver decisions, or environmental forces were the primary cause, per a legal analysis of the earlier August 6 crash. It remains an open question whether state transportation officials will consider new high-wind speed restrictions or travel advisories for empty commercial vehicles crossing the spillway bridge during active severe weather watches, following two such rollovers on the same span in less than a month.