I fuckin love these yellow vests, every car in France must have vests, Under what circumstances do you wear these vests?

In a state of Emergency! These vests say "I'm in trouble, I need help" "I want to be seen" "I'm trying to act responsibly as I work to fix my problems" It's genius. Its the french equivalent of flying an American flag upside down (Doesn't work with the French flag lol)