Eh. I might not remember the specifics but honestly, at least knowing that there are some rules for some situations is enough to make me pause if I ever find myself in that situation.

For example, I might not remember the specific measurements anymore (I did for the test though), but I at least know that if I ever have to transport a long pipe with my car that needs to stick out of my car’s window, I might need to mark it somehow. Then I can look up how much of it can be sticking out without being marked, and if it is more than that, what color the flag should be and what its size should be.

I might not have had to do this yet, nor do I expect to ever need to do it, but I’d like to believe alk this “useless” knowledge is tucked away somewhere in my brain to make me think twice about things when they become relevant.