That means its zoned 20 ~ 35 Mph
Not in CA, most likely. Don’t see too many neighborhoods with limits over 25, especially near schools. Of course, it’s a far better idea to wreck the street (and home values) by installing stupid speed bumps to accomodate lazy parents and cat owners who are unfortunately clueless to the fact that roads are a means for people to get from point A to point B safely and efficiently, and not playgrounds for kids and animals.