NEW ORLEANS (WGNO) — The Bonnet Carre Spillway has reopened after dense fog led to hours-long closures. On Wednesday, Dec. 18 around 3:15 a.m., Department of Transportation and Development officials began diverting traffic to Interstate 310 South due to the closure. Dense fog likely again tonight Drivers are also encouraged to take an alternate route for their morning commute as congestion continues to back up. Around 6:30 a.m., DOTD reopened lanes but closed soon after. At 7:58 a.m., DOTD officials reported a reopening at mile marker 220 with minimal congestion. Causeway Police also enforced a rolling convoy for the southbound bridge also due to the fog. Speed limits will be determined by visibility. This is a result of a multi-car pileup on the Causeway that left dozens injured. Stay up to date with the latest news, weather and sports by downloading the WGNO app on the Apple or Google Play stores and by subscribing to the WGNO newsletter. Latest Posts US Postal Service warns of 'smishing,' other holiday scams: What to know Tips for celebrating the holidays with someone who has dementia Young Americans richer than ever, sense ‘economic fragility’: Report Baton Rouge $1M Mega Millions winner misses $4M by skipping $1 megaplier Video: Stolen ambulance collides with police car in Tennessee