Marching traffic cones join 6t’9 Social Aid & Pleasure Club’s Halloween parade 

From NOLA.com:

Marching traffic cones join 6t’9 Social Aid & Pleasure Club’s Halloween parade 

https://www.nola.com/entertainment_life/festivals/article_b2b07e66-53bb-11ed-997e-3b0984f7aea3.html