The New Orleans Vehicle Attack Barriers Were Being Replaced, so some of them weren't working at the time

 https://www.newsweek.com/new-orleans-vehicle-attack-barriers-replacement-2008442

While its a good idea to have such safety barriers, there should have been some temporary ones installed while the repairs were being made.

https://www.msn.com/en-us/news/us/new-orleans-was-partway-through-replacing-its-street-barriers-leaving-a-fatal-opening/ar-AA1wR1Dq

https://www.nbcnews.com/news/us-news/new-orleans-barriers-prevent-car-attacks-didnt-use-new-years-rcna186012

https://abcnews.go.com/US/wireStory/new-orleans-barriers-prevent-vehicle-attacks-process-replaced-117255317

https://www.cnn.com/2025/01/03/us/bourbon-street-barricades-new-orleans/index.html

https://thedigitallabyrinth.blogspot.com/search?q=New+Orleans

https://thedigitallabyrinth.blogspot.com/search?q=Suspects+in+Las+Vegas+explosion+and+New+Orleans+attack+served+at+the+same+Army+base