It recently occurred to me that I don't know what to call a street sign in Latin. I know that a general word for "sign" is signum, but the dictionaries I consulted do not specify whether it applies to this kind of use as well. Perhaps a better English keyword is "plaque" than "sign", but at least Lewis and Short appear not to use this word.
So, what would be a good word for a street sign in Latin? Are there attestations of this use or something similar enough?