I have posted an excerpt from this booklet before. Now you can have access to the whole thing! Some traffic regulations, you just have to shake your head at. https://louisianadigitallibrary.org/islandora/object/oplib-orv%3A15
Stuffed in one of the files of the Ouachita Parish Public Library was a booklet detailing the traffic regulations in Monroe in 1940. I found this page on turning signals a hoot! It was the law that when you had to stop to turn, you had to use one of these signals!