Are you an expert on sign meanings? I personally don't know much about Safety Sign meanings. I just know general signs like: NO smoking, school crossing signs, etc. I only know some basic traffic signs that's all and I don't have a driver's licence. I am not sure if I want to learn how to drive a car, you have to pay a lot of money these days to get have lessons and get a drive's licence in here. I prefer to use some money for travelling.
Besides safety signs, there are lots of signs on the street that you can see like: Traffic Signs, Parking Signs, Construction Signs, Road Signs, Street Signs, Caution Signs, and Danger Signs. There are hundreds more like these.
I would to share a few funny Street Signs that I found through Google search images. If you want to see more, just use the search engine and type in the keywords "funny street signs".